Modified gold nanoparticle vectors: A biocompatible intracellular delivery system for pancreatic islet cell transplantation.

Surgery. 2010 Aug 25;

Authors: Vega RA, Wang Y, Harvat T, Wang S, Qi M, Adewola AF, Lee D, Benedetti E, Oberholzer J

BACKGROUND: Islet transplantation is an emerging therapy for type 1 diabetes mellitus with variable success. Molecular therapeutics is a promising approach to improve islet graft function and transplant outcomes. Traditional delivery vectors, however, have poor cell penetration and generally lead to compromised islet function. Modified gold nanoparticles represent a potential alternative in that they are taken up into cells efficiently and have unique binding properties. The objective of this study was to investigate whether gold nanoparticles can transfect islets uniformly without compromising cellular function. METHODS: Cy5-oligonucleotide-conjugated gold nanoparticle islet transfection was evaluated using confocal microscopy and flow cytometry. Isolated mice and human islets were transfected and evaluated for mitochondrial potential changes, calcium influx, and insulin secretion in response to glucose challenge and in vivo graft function. RESULTS: Highly efficient gold nanoparticle uptake was observed. Transfected islets demonstrated normal mitochondrial function, calcium influx, and insulin release when stimulated by glucose. These islets produced a 100% diabetes cure rate after transplantation. Intraperitoneal glucose tolerance test demonstrated similar graft function as controls. CONCLUSION: We describe the development of a modified gold nanoparticle approach that allows for the efficient and nontoxic transfection of not only single cells but also more complex tissue architectures, such as pancreatic islets, both in vitro and in vivo.

PMID: 20800254 [PubMed - as supplied by publisher]

Recurrent hyperparathyroidism and forearm parathyromatosis after total parathyroidectomy.

Surgery. 2010 Aug 25;

Authors: Melck AL, Carty SE, Seethala RR, Armstrong MJ, Stang MT, Ogilvie JB, Yip L

BACKGROUND: In multiple endocrine neoplasia type I and renal failure, the type of initial parathyroidectomy for hyperparathyroidism may influence the operative risks and development of recurrence. We compared subtotal parathyroidectomy with total parathyroidectomy and immediate forearm autotransplantation (TPFA) in a large series with long-term follow-up. METHODS: The data of patients treated from 1977 to 2009 by initial or reoperative TPFA or subtotal parathyroidectomy were examined for outcomes including the interval to sites and tissue patterns of recurrence. RESULTS: Permanent hypoparathyroidism was rare and uninfluenced by disease type. Neither initial procedure nor underlying disease affected the mean time to reoperation for recurrent hyperparathyroidism. In renal failure, reoperation was more common after TPFA than subtotal parathyroidectomy (5/19, 26% vs 11/193, 6%; P = .008). Twelve patients required forearm reoperation after TPFA, which was often complicated by parathyromatosis (7/12, 58%). Further reoperative forearm surgery was more likely after explant excision than after en bloc resection (7/11 vs 0/8; P = .01) and occurred sooner in renal failure than in multiple endocrine neoplasia type I (mean 4.4 vs 9 years; P = .04). Permanent hypoparathyroidism was rare and uninfluenced by disease type. CONCLUSION: Because of frequent recurrence, TPFA should be abandoned as a treatment of renal hyperparathyroidism. In multiple endocrine neoplasia type I, subtotal parathyroidectomy has similar outcomes to TPFA. Forearm autotransplantation can be complicated by parathyromatosis, and surgeons should be prepared for reoperative en bloc resection.

PMID: 20800255 [PubMed - as supplied by publisher]

Surveillance after surgical treatment of melanoma: Futility of routine chest radiography.

Surgery. 2010 Aug 26;

Authors: Brown RE, Stromberg AJ, Hagendoorn LJ, Hulsewede DY, Ross MI, Noyes RD, Goydos JS, Urist MM, Edwards MJ, Scoggins CR, McMasters KM, Martin RC

BACKGROUND: Current recommendations by the National Comprehensive Cancer Network and other groups suggest that follow-up of cutaneous melanoma may include chest radiography (CXR) at 6- to 12-month intervals. The aim of this study was to determine the clinical efficacy of routine CXR for recurrence surveillance in melanoma. METHODS: Post hoc analysis was performed on data from a prospective, randomized, multi-institutional study on melanoma >/=1.0 mm in Breslow thickness. All patients underwent excision of the primary melanoma and sentinel node biopsy with completion lymphadenectomy for positive sentinel nodes. Yearly CXR and clinical assessments were obtained during follow-up. Results of routine CXR were compared with clinical disease states over the course of the study. RESULTS: A total of 1,235 patients were included in the analysis over a median follow-up of 74 months (range, 12-138). Overall, 210 patients (17.0%) had a recurrence, most commonly local or in-transit. Review of CXR results showed that 4,218 CXR were obtained in 1,235 patients either before, or in the absence of, initial recurrence. To date, 88% (n = 3,722) CXR are associated with no evidence of recurrence. Of CXR associated with recurrence, only 7.7% (n = 38) of surveillance CXR were read as “abnormal.” Overall, 99% (n = 4,180) of CXR were read as either “normal” or found to be falsely positive (read as “abnormal,” but without evidence of recurrence on investigation). Only 0.9% (n = 38) of all CXR obtained were true positives (“abnormal” CXR, with confirmed first known recurrence). Among these 38 patients with true positive CXR, 35 revealed widely disseminated disease (multiorgan or bilateral pulmonary metastases); only 3 (0.2%) had isolated pulmonary metastases amenable to resection. Sensitivity and specificity for surveillance CXR in detecting initial recurrence were 7.7% and 96.5%, respectively. CONCLUSION: The routine use of surveillance CXR provides no clinically useful information in the follow-up of patients with melanoma. CXR does not detect recurrence at levels sufficient to justify its routine use and, therefore, cannot be recommended as part of the standard surveillance regimen for these patients.

PMID: 20800862 [PubMed - as supplied by publisher]

Parathyroidectomy for hypercalcemic crisis: 40 years’ experience and long-term outcomes.

Surgery. 2010 Aug 26;

Authors: Cannon J, Lew JI, Solórzano CC

BACKGROUND: Hypercalcemic crisis is a serious and potentially life-threatening complication of markedly increased serum calcium concentrations most commonly due to severe primary sporadic hyperparathyroidism (HPT). METHODS: A review of 1,310 consecutive patients with severe sporadic HPT who underwent parathyroidectomy at a single institution from April 1970 through July 2009 was performed. Of this series, 88 patients were treated operatively for hypercalcemic crisis associated with signs and symptoms of acute calcium intoxication and/or serum calcium concentrations >/=14 mg/dL (3.5 mmol/L). Clinical presentation, laboratory values, operative success, operative failure, and disease recurrence were compared to noncrisis patients. RESULTS: Preoperative calcium and parathyroid hormone (PTH) concentrations were significantly greater among patients with hypercalcemic crisis. Crisis patients had a greater incidence of mental status changes, fatigue, ectopic glands, and pancreatitis. Postoperatively, calcium and PTH levels were similar. Overall, crisis patients had a lesser rate of operative success compared to noncrisis patients (92% vs 97%). With the advent of intraoperative PTH monitoring-guided focused parathyroidectomy in 1993, success rates equalized (95% vs 97%). There was no difference in disease recurrence. Overall follow-up was 59 months. CONCLUSION: Hypercalcemic crisis patients are appropriately treated by expeditious parathyroidectomy, but overall have slightly lesser rates of initial operative success than noncrisis patients. Long-term results reveal similar serum calcium, PTH concentrations, and recurrence rates at a mean follow-up of nearly 5 years.

PMID: 20800863 [PubMed - as supplied by publisher]

Impact of anastomotic leak on outcomes after transhiatal esophagectomy.

Surgery. 2010 Aug 26;

Authors: Schuchert MJ, Abbas G, Nason KS, Pennathur A, Awais O, Santana M, Pereira R, Oostdyk A, Luketich JD, Landreneau RJ

BACKGROUND: The development of anastomotic leaks and/or strictures can be associated with considerable morbidity and impairment of quality of life. In the current study, we evaluated the outcomes of patients who developed anastomotic complications after esophagectomy to elucidate the impact of these events on morbidity, mortality, and subsequent need for dilation. METHODS: We analyzed retrospectively the clinical course of 235 patients who underwent transhiatal esophagectomy for cancer from 2001 to 2009. Patients with confirmed anastomotic leaks were identified and classified with the following scale: class 1: Radiographic leak only, no intervention; class 2: leak requiring opening of the wound, cervical and/or percutaneous drainage; class 3: disruption of anastomosis (10-50% circumference) with perianastomotic abscess requiring video-assisted thoracoscopic surgery or thoracotomy; and class 4: gastric tip necrosis with anastomotic separation (>50% circumference). RESULTS: Anastomotic leaks were encountered in 30 patients (13%). Anastomotic leaks were associated with greater morbidity (70% vs 47%; P = .02) and stricture formation (57% vs 19%; P = .0001). Mortality was not different. Increasing leak class was associated with an increased need for postoperative anastomotic dilations (P = .016). CONCLUSION: Anastomotic integrity after esophagectomy has a substantial impact on perioperative course and long-term swallowing. A more formal radiographic and endoscopic leak classification system seems justified.

PMID: 20800864 [PubMed - as supplied by publisher]

FAST scan: Is it worth doing in hemodynamically stable blunt trauma patients?

Surgery. 2010 Aug 26;

Authors: Natarajan B, Gupta PK, Cemaj S, Sorensen M, Hatzoudis GI, Forse RA

BACKGROUND: During the last decade, focused assessment with sonography for trauma increasingly has become the initial diagnostic modality of choice in trauma patients. It is still questionable, however, whether its use results in the underdiagnosis of intra-abdominal injury. It also remains doubtful whether a positive focused assessment with sonography for trauma affects clinical decision making in hemodynamically stable blunt trauma patients as evidenced through abdominal computerized tomography use. The aim of this study was to evaluate the results of focused assessment with sonography for trauma in hemodynamically stable blunt trauma patients and to determine its role in the diagnostic evaluation of these patients. METHODS: We reviewed our prospectively maintained trauma database. In trauma patients at our institute, focused assessment with sonography for trauma examinations are performed by surgery residents and are considered positive when free intra-abdominal fluid is visualized. Abdominal computerized tomography, diagnostic peritoneal lavage, or exploratory laparotomy findings were used as confirmation of intra-abdominal injury. RESULTS: In our 7-year study period, 2,980 trauma patients were evaluated at our institute, of which 2,130 patients underwent a focused assessment with sonography for trauma. In all, 18 patients had an inconclusive focused assessment with sonography for trauma, whereas 7 patients died on arrival, leaving 2,105 patients for our analysis. A total 88 true positive focused assessment with sonography for trauma were conducted. All hemodynamically stable blunt trauma patients who had a positive focused assessment with sonography for trauma (70/88) were confirmed by computerized tomography. Patients who underwent exploratory laparotomy directly (17/88) or diagnostic peritoneal lavage (1/88) as confirmation either had penetrating trauma or became hemodynamically unstable. A total of 1,894 true negative focused assessments with sonography for trauma scans were conducted, with 1,201 confirmed by computerized tomography and the rest by observation. In all, 118 false negative focused assessment with sonography for trauma were performed, of which 44 (37.3%) subsequently required exploratory laparotomy. Five patients had false positive focused assessment with sonography for trauma scans. Focused assessment with sonography for trauma scan had an overall sensitivity of 43%, a specificity of 99%, and positive and negative predictive values of 95% and 94%, respectively. Accuracy was 94.1%. In the hemodynamically stable blunt trauma group, there were 60 patients with true positive focused assessment with sonography for trauma examinations and 87 patients with false negative focused assessment with sonography for trauma examinations. In this group of patients, focused assessment with sonography for trauma had a sensitivity of 41%, specificity of 99%, and positive and negative predictive values of 94% and 95%, respectively. The overall accuracy was 95%. CONCLUSION: Given the low sensitivity, a negative focused assessment with sonography for trauma without confirmation by computerized tomography may result in missed intra-abdominal injuries. It is also observed in all focused assessment with sonography for trauma positive hemodynamically stable blunt trauma patients, confirmation is preferred through the use of a computerized tomography for better understanding of the intra-abdominal injuries and to decide on operative versus no-operative management. Thus, the use of focused assessment with sonography for trauma in hemodynamically stable blunt trauma patients seems not worthwhile. It should be reserved for hemodynamically unstable patients with blunt trauma.

PMID: 20800865 [PubMed - as supplied by publisher]

Banding in Bangkok, CABG in Calcutta: the United States physician and the growing field of medical tourism.

Surgery. 2010 Sep;148(3):597-601

Authors: Weiss EM, Spataro PF, Kodner IJ, Keune JD

PMID: 20803843 [PubMed - in process]

Pancreatic surgery: Evolution at a high-volume center.

Surgery. 2010 Aug 24;

Authors: Ziegler KM, Nakeeb A, Pitt HA, Schmidt CM, Bishop SN, Moreno J, Matos JM, Zyromski NJ, House MG, Madura JA, Howard TJ, Lillemoe KD

BACKGROUND: Advances in imaging, minimally invasive techniques, and regionalization have changed pancreatic surgery. Therefore, the aims of this report are to determine whether the pancreatic operations or the spectrum of disease have evolved at a high-volume center. METHODS: From 1996 through 2009, 2,004 pancreatic operations were performed at Indiana University Hospital. The operations, pathology, and outcomes for 1996-2003 were compared with 2004-2009. RESULTS: In 2004-2009, more operations/year were performed (215 vs 89; P < .01) and patients were older (58.8 years vs 55.8 years; P < .01). In recent years, more pancreatoduodenectomies (55.0% vs 50.4%) and fewer pancreatojejunostomies (6.2% vs 12.6%) and Beger/Frey procedures (2.6% vs 4.8%) were performed (P < .05). In 2004-2009, pylorus preservation (81.1% vs 64.4%), laparoscopic distal pancreatectomy (33.9% vs 0%), and splenic preservation (25.3% vs 2.2%) were carried out more frequently (P < .001). Pathology review revealed more tumors (68.8% vs 60.4%) and less pancreatitis (29.2% vs 34.4%; P < .01). Thirty-day mortality improved from 2.5% to 1.8%. CONCLUSION: At a high-volume pancreatic surgery center, the number and age of the patients, the percentage of pancreatic resections, preservation of the pylorus and spleen as well as laparoscopic procedures, and the percentage of patients with tumors all have increased, whereas the outcomes continued to improve.

PMID: 20797743 [PubMed - as supplied by publisher]

Industrial relations with academic health care and professional medical associations: What’s all the fuss? Who cares anyway?

Surgery. 2010 Aug 24;

Authors: Turnipseed W

PMID: 20797744 [PubMed - as supplied by publisher]

Comparison of outcomes after laparoscopic versus open appendectomy for acute appendicitis at 222 ACS NSQIP hospitals.

Surgery. 2010 Aug 24;

Authors: Ingraham AM, Cohen ME, Bilimoria KY, Pritts TA, Ko CY, Esposito TJ

BACKGROUND: The benefit of laparoscopic (LA) versus open (OA) appendectomy, particularly for complicated appendicitis, remains unclear. Our objectives were to assess 30-day outcomes after LA versus OA for acute appendicitis and complicated appendicitis, determine the incidence of specific outcomes after appendectomy, and examine factors influencing the utilization and duration of the operative approach with multi-institutional clinical data. METHODS: Using the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database (2005-2008), patients were identified who underwent emergency appendectomy for acute appendicitis at 222 participating hospitals. Regression models, which included propensity score adjustment to minimize the influence of treatment selection bias, were constructed. Models assessed the association between surgical approach (LA vs OA) and risk-adjusted overall morbidity, surgical site infection (SSI), serious morbidity, and serious morbidity/mortality, as well as individual complications in patients with acute appendicitis and complicated appendicitis. The relationships between operative approach, operative duration, and extended duration of stay with hospital academic affiliation were also examined. RESULTS: Of 32,683 patients, 24,969 (76.4%) underwent LA and 7,714 (23.6%) underwent OA. Patients who underwent OA were significantly older with more comorbidities compared with those who underwent LA. Patients treated with LA were less likely to experience an overall morbidity (4.5% vs 8.8%; odds ratio [OR], 0.60; 95% confidence interval [CI], 0.54-0.68) or a SSI (3.3% vs 6.7%; OR, 0.57; 95% CI, 0.50-0.65) but not a serious morbidity (2.6% vs 4.2%; OR, 0.86; 95% CI, 0.74-1.01) or a serious morbidity/mortality (2.6% vs 4.3%; OR, 0.87; 95% CI, 0.74-1.01) compared with those who underwent OA. All patients treated with LA were significantly less likely to develop individual infectious complications except for organ space SSI. Among patients with complicated appendicitis, organ space SSI was significantly more common after laparoscopic appendectomy (6.3% vs 4.8%; OR, 1.35; 95% CI, 1.05-1.73). For all patients with acute appendicitis, those treated at academic-affiliated versus community hospitals were equally likely to undergo LA versus OA (77.0% vs 77.3%; P = .58). Operative duration at academic centers was significantly longer for both LA and OA (LA, 47 vs 38 minutes [P < .0001]; OA, 49 vs 44 minutes [P < .0001]). Median duration of stay after LA was 1 day at both academic-affiliated and community hospitals. CONCLUSION: Within ACS NSQIP hospitals, LA is associated with lower overall morbidity in selected patients. However, patients with complicated appendicitis may have a greater risk of organ space SSI after LA. Academic affiliation does not seem to influence the operative approach. However, LA is associated with similar durations of stay but slightly greater operative times than OA at academic versus community hospitals.

PMID: 20797745 [PubMed - as supplied by publisher]

Impact of standardized trauma documentation to the hospital’s bottom line.

Surgery. 2010 Aug 24;

Authors: Barnes SL, Waterman M, Macintyre D, Coughenour J, Kessel J

BACKGROUND: The dichotomy between clinical and hospital revenue generation for trauma care is well established. Many trauma programs require hospital support for fiscal survival. We evaluated the impact of standardized clinical documentation to the hospital’s bottom line at our trauma center. METHODS: Standardized documentation templates for evaluation and management were created with a focus on accuracy and efficiency. Documentation was completed jointly by residents and faculty following standard guidelines of linkage. Trauma service characteristics, case mix index, reimbursement rate, payer distribution, hospital charges, cost, and payments were compared before and after standardization. Professional revenue was not evaluated. Analysis was performed using a commercially available spreadsheet computer application. RESULTS: A 24% increase in the hospital’s net income for trauma care, constituting $1.45 million, was realized despite a 12% decrease in patient volume. Admission profitability increased by 42%. Collection rates and payer mix were unchanged. Increases in both injury severity score and case mix index were seen (P < .05) after implementation of the program. Length of stay was decreased significantly. CONCLUSION: An effective standardized documentation strategy for trauma care results in significant fiscal gains in hospital reimbursement.

PMID: 20797746 [PubMed - as supplied by publisher]

Clinical framework to guide operative decision making in disconnected left pancreatic remnant (DLPR) following acute or chronic pancreatitis.

Surgery. 2010 Aug 24;

Authors: Murage KP, Ball CG, Zyromski NJ, Nakeeb A, Ocampo C, Sandrasegaran K, Howard TJ

BACKGROUND: Disconnected left pancreatic remnant (DLPR) presents clinically as a pancreatic fistula, pseudocyst, or obstructive pancreatitis. Optimal operative treatment, either distal pancreatectomy (DP) or internal drainage (ID), remains unknown. This paper critically evaluates our operative experience in patients with DLPR. METHODS: A retrospective analysis of a consecutive case series from a single, high-volume institution was carried out. A total of 76 patients with radiographic-confirmed DLPR (computed tomography + endoscopic retrograde cholangiopancreatography or magnetic resonance cholangiopancreatography) who had operations between November 1995 and September 2008 were included. Pancreas preservation (the use of ID) was our default unless anatomic, physiologic, or technical factors precluded it. Follow-up to July 2009 was done (median follow-up, 22 months). Standard statistical methodology was used (P < .05 = statistical significance). RESULTS: The mean age of this cohort was 52 years (range, 18-85); 57% of the patients were male. A total of 59 (73%) had acute pancreatitis, whereas 17 (22%) had chronic pancreatitis. Presentation was pseudocyst in 53%, pancreatic fistula in 34%, and obstructive pancreatitis in 13%. Resection (DP) and drainage (ID) options were utilized equally for each clinical presentation as follows: pseudocyst, 60/40; pancreatic fistula, 50/50; or obstructive pancreatitis, 50/50. The strongest driver for DP (92%) was a small pancreatic remnant and splenic vein thrombosis. In contrast, large pancreatic remnants had ID 70% of the time. No differences in short- or long-term outcomes between DP or ID options were identified. CONCLUSION: Using anatomic, physiologic, and technical factors to guide operative choice in DLPR, we report a 74% success rate with DP and an 82% success rate with ID at a median follow-up of 22 months. A pancreatic remnant size >6 cm favored ID options over resection.

PMID: 20797747 [PubMed - as supplied by publisher]

Robotic distal pancreatectomy: Cost effective?

Surgery. 2010 Aug 24;

Authors: Waters JA, Canal DF, Wiebke EA, Dumas RP, Beane JD, Aguilar-Saavedra JR, Ball CG, House MG, Zyromski NJ, Nakeeb A, Pitt HA, Lillemoe KD, Schmidt CM

BACKGROUND: Minimally invasive techniques and even robotics in pancreaticobiliary surgery are being used increasingly. Cost-effectiveness is a practical burden associated with the introduction of surgical innovation. This study compares the costs and the outcomes of open, laparoscopic, and robotic distal pancreatectomies. We hypothesized that robotic distal pancreatectomy is cost-effective. METHODS: Between August 2008 and August 2009, 77 distal pancreatectomies were performed at a single academic medical center. A retrospective analysis of prospectively collected data on demographics, short-term outcomes, and direct cost was performed. RESULTS: Thirty-two open distal pancreatectomies, 28 laparoscopic distal pancreatectomies, and 17 robotic distal pancreatectomies were performed. Age, American Society of Anesthesia preoperative risk score, and specimen length were similar. Indications for laparoscopic distal pancreatectomies and robotic distal pancreatectomies included more cystic neoplasms (49%) and fewer malignancies (29%) versus open distal pancreatectomies (16% and 47%). Spleen preservation occurred in 65% robotic distal pancreatectomies versus 12% and 29% in open distal pancreatectomies and laparoscopic distal pancreatectomies (P < .05). The operative time averaged 298 minutes in robotic distal pancreatectomies versus 245 and 222 minutes in open distal pancreatectomies and laparoscopic distal pancreatectomies (P < .05). Blood loss and morbidity were similar with no mortality. The length of stay was 4 days in robotic distal pancreatectomies versus 8 and 6 in open distal pancreatectomies and laparoscopic distal pancreatectomies (P < .05). The total cost was $10,588 in robotic distal pancreatectomies versus $16,059 and $12,986 in open distal pancreatectomies and laparoscopic distal pancreatectomies. CONCLUSION: These data suggest direct hospital costs are comparable among all groups. They suggest a shorter length of stay in robotic versus laparoscopic or open approaches. Finally, spleen and vessel preservation rates may improve with a robotic approach at the expense of increased operative time. In summary, robotic distal pancreatectomy is safe and cost effective in selected cases.

PMID: 20797748 [PubMed - as supplied by publisher]

Pancreatic cyst aspiration analysis for cystic neoplasms: Mucin or carcinoembryonic antigen-Which is better?

Surgery. 2010 Aug 24;

Authors: Morris-Stiff G, Lentz G, Chalikonda S, Johnson M, Biscotti C, Stevens T, Matthew Walsh R

BACKGROUND: Differentiation between the various pathologies presenting as a cystic pancreatic lesion is clinically important but often challenging. We have previously advocated the performance of endoscopic ultrasound (EUS) with aspiration and determination of mucin and carcinoembryonic antigen (CEA) content. We sought to report the results of this ongoing protocol and determine the relative importance of cyst fluid mucin and CEA for the diagnostic process. METHODS: The institutions prospectively maintained pancreatic cyst database was accessed to identify patients who had undergone pancreatic EUS and cyst aspiration as part of their evaluation. Only those patients who had subsequently undergone resection were selected, with histopathology being the gold standard for comparison. RESULTS: From January 2000 to July 2009, 174 patients with pancreatic cystic disease underwent surgery, 121 of whom had an EUS with aspiration attempted at our institution with specimens sent for mucin and CEA. Based on histopathology, 86 mucinous lesions were identified, including 44 cystadenomas, 34 intraductal papillary mucinous neoplasms, 7 mucinous adenocarcinomas, and 1 intraductal oncocytic papillary neoplasm; 42 were nonmucinous lesions. The median cyst CEA levels were significantly higher in the mucinous lesions group at 850 versus 2 ng/mL (P = .001). The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), positive diagnostic likelihood ratio, and negative diagnostic likelihood ratio (NDLR) were calculated respectively for mucin alone (0.80, 0.40, 0.61, 0.63, 1.33, 0.68); CEA alone (0.93, 0.43, 0.51, 0.91, 1.63, 0.16); cytology alone (0.38, 0.9, 0.92, 0.31, 3.67, 0.69); mucin or CEA (0.83, 0.65, 0.87, 0.57, 2.51, 0.26); mucin or CEA or cytology (0.92, 0.52, 0.86, 0.68, 1.91, 0.15); mucin plus CEA (0.96, 0.34, 0.25, 0.97, 1.45, 0.12); mucin plus cytology (0.25, 0.97, 0.96, 0.29,7.25, 0.78); CEA plus cytology (0.12, 1.00, 1.00, 0.26, infinity, 0.88); and mucin plus CEA plus cytology (0.08, 1.00, 1.00, 0.25, infinity, 0.92). CONCLUSION: Assessment of cyst mucin and CEA are complementary, with the best profile obtained when both markers are determined along with cytology. This combination provides a good sensitivity, PPV, and NDLR, as well as reasonable PPV and PDNR.

PMID: 20797749 [PubMed - as supplied by publisher]

Multicenter analysis of diaphragm pacing in tetraplegics with cardiac pacemakers: Positive implications for ventilator weaning in intensive care units.

Surgery. 2010 Aug 24;

Authors: Onders RP, Khansarinia S, Weiser T, Chin C, Hungness E, Soper N, Dehoyos A, Cole T, Ducko C

BACKGROUND: Diaphragm pacing (DP) can replace mechanical ventilation in tetraplegics and in trials has assisted respiration in amyotrophic lateral sclerosis patients. This report describes results of DP in patients with cardiac pacemakers. METHODS: Prospective, single-center and multicenter, nonrandomized, controlled, interventional protocols under U.S. Food and Drug Administration and/or institutional review board approval were evaluated. Patients underwent laparoscopic diaphragm motor point mapping to identify optimal electrode site for implantation. With diaphragm conditioning, patients were weaned from their ventilator. Perioperative and long-term assessments between the cardiac pacemakers and DP were analyzed for any device-to-device interactions. RESULTS: Over 300 subjects were implanted from 2000 to 2010. Twenty tetraplegics with cardiac pacemakers and DP were analyzed from 6 sites. Subjects ranged from 19 to 61 years old with DP implantation 6 months to 24 years postinjury. There were no immediate or long-term device to device interactions. All patients achieved diaphragm-paced tidal volumes exceeding their basal requirements and, after conditioning, all patients could go >4 hours without mechanical ventilators; 71% could go 24 hours continuously. CONCLUSION: DP can be safely implanted in tetraplegics having cardiac pacemakers. Applications for temporary use of DP to maintain diaphragm type 1 muscle fiber and improve posterior lobe ventilation may benefit complex critical care patients.

PMID: 20797750 [PubMed - as supplied by publisher]

Expression of the Sonic Hedgehog pathway molecules in synchronous follicular adenoma and papillary carcinoma of the thyroid gland in predicting malignancy.

Surgery. 2010 Aug 24;

Authors: Nelson KK, Gattuso P, Xu X, Prinz RA

BACKGROUND: Recent studies have shown that the Sonic Hedgehog pathway plays an important role in tumorigenesis and cancer proliferation. The Sonic Hedgehog pathway is required for normal thyroid gland development, but when activated as a result of gene mutation or overexpression, it may stimulate thyroid tumor cell proliferation. This study determines whether 3 molecules, Patched, Smoothened, and Sonic Hedgehog, involved in the Sonic Hedgehog pathway are overexpressed equally in synchronous follicular thyroid adenoma and papillary thyroid carcinoma. METHODS: Eighteen patients with synchronous follicular thyroid adenoma and papillary thyroid carcinoma underwent thyroidectomy. Immunohistochemistry was performed on the paraffin-embedded tissue to detect expression of Patched, Smoothened, and Sonic Hedgehog in both tumor types. The expression in these neoplasms was graded by 2 observers. RESULTS: Five patients had insufficient tumor tissue and were removed from the analysis. Patched expression was detected in 5 of 13 (38%) follicular adenomas and 5 of 12 (42%) papillary carcinomas. Smoothened was expressed in 4 of 13 (31%) follicular adenomas and 3 of 13 (23%) papillary carcinomas. Sonic Hedgehog was expressed in 4 of 13 (31%) follicular adenomas and 11 of 13 (85%) papillary carcinomas. CONCLUSION: Expression of the 3 molecules involved in the Sonic Hedgehog pathway was similar in follicular thyroid adenoma, but Sonic Hedgehog expression was a more sensitive indicator of malignancy in papillary thyroid carcinoma. The Sonic Hedgehog molecule may become a diagnostic marker when the cytologic or histologic features are not characteristic of a papillary carcinoma. Greater understanding of the Sonic Hedgehog pathway may provide molecular methods for preventing or treating papillary thyroid carcinoma.

PMID: 20797751 [PubMed - as supplied by publisher]

Related Articles

Prophylactic total gastrectomy for individuals with germline CDH1 mutation.

Surgery. 2010 Aug 16;

Authors: Pandalai PK, Lauwers GY, Chung DC, Patel D, Yoon SS

BACKGROUND: Germline mutation of the CDH1 gene, which encodes for the E-cadherin adhesion protein, is rare but confers an estimated lifetime risk of hereditary diffuse gastric cancer of 87%. Fewer than 100 prophylactic total gastrectomies have been reported for this condition. METHODS: Patients with germline CDH1 mutation who underwent multidisciplinary counseling followed by prophylactic total gastrectomy were reviewed. RESULTS: Ten patients (6 male, 4 female) with a median age of 42 years (range, 26-51) underwent prophylactic total gastrectomy between 2006 and 2009. Of the 6 families represented, there were 4 missense, 1 frameshift, and 1 splice site mutation. Median time from genetic testing to surgery was 3 months (range, 1-7). All patients had an upper endoscopy before surgery, identifying only 1 patient with a focus of diffuse gastric cancer. After prophylactic total gastrectomy, extensive pathologic analysis demonstrated that 9 patients had up to 77 foci of noninvasive cancer, and 2 of these patients had 4-12 foci of T1 invasive cancer. Median operative time was 213 minutes; there were no anastomotic leaks, and the length of stay was 7-8 days. One patient had a complication within 30 days (pulmonary embolism), and 3 patients had late complications (2 small bowel obstructions and 1 anastomotic stricture). Median weight loss at 6 months was 19%. CONCLUSION: The majority of patients with germline CDH1 mutation have foci of noninvasive or invasive gastric cancer by middle age. Serial upper endoscopies provide inadequate screening. Prophylactic total gastrectomy is the procedure of choice for definitive treatment.

PMID: 20719348 [PubMed - as supplied by publisher]

Related Articles

Different patterns of cancer incidence among African American and Caucasian renal allograft recipients.

Surgery. 2010 Aug 16;

Authors: Gruber SA, Singh A, Mehta K, Morawski K, West MS, Doshi MD

BACKGROUND: Little data are available regarding cancer incidence in separately analyzed African American renal allograft recipients, with no study examining in detail the incidence and relative distribution of individual post-transplant malignancies versus those occurring in Caucasians. METHODS: We compared the incidence of non-skin cancer occurring in 495 African Americans transplanted at our center from 1984 to 2007 and followed through June 2009 with that occurring in 11,155 patients in the Canadian Organ Replacement Registry transplanted from 1981 to 1998 and followed through December 1999, of which 97% were Caucasian. RESULTS: Despite a shorter follow-up, the overall incidence of non-skin cancer, as well as that of prostate, renal cell, pancreatic, and esophageal cancer, was significantly higher in the African American group. Cancers of the prostate and pancreas comprised a significantly higher fraction of neoplasms occurring in the African American group, whereas lip cancer did so in the Canadian Organ Replacement Registry group. CONCLUSION: In our pilot study, the overall incidence of non-skin cancers was higher in African American versus Caucasian renal allograft recipients, reflecting a significantly different relative distribution of cancer types that follows cancer incidence trends by race in the general population in several but not all cases. If verified in subsequent studies, these findings have important implications with regard to the need for transplant programs to tailor cancer education and pretransplant and post-transplant surveillance appropriately to the African American patient.

PMID: 20719349 [PubMed - as supplied by publisher]

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A statewide consortium of surgical care: A longitudinal investigation of vascular operative procedures at 16 hospitals.

Surgery. 2010 Aug 16;

Authors: Henke PK, Kubus J, Englesbe MJ, Harbaugh C, Campbell DA

BACKGROUND: Regional surgical quality improvement consortiums are becoming more common. Herein we have reported the effectiveness of a statewide consortium focusing on open vascular operative procedures. METHODS: The statewide Michigan Surgical Quality Consortium was established in 2005 with 16 hospitals that report cases of vascular open operative intervention, in a sampling manner consistent with the private sector National Surgical Quality Improvement Program. Data are abstracted by onsite trained nurses using defined and validated pre-, peri-, and postoperative variables with 30-day follow-up. Outpatient and emergent cases were excluded. We compared outcomes over the course of the consortium (era I, April 2005-March 2007; era II, April 2007-March 2008) via univariate and multivariate techniques. RESULTS: Era I (n = 2,453) and era II (n = 3,409) cases were similar in age (mean, 68 years), gender (61% male), relative value units (mean, 21), and distribution of Current Procedural Terminology codes. Duration of stay and operative time decreased by 15% and 11%, respectively, when comparing era I with era II (P < .001). Mortality at 30 days was not different between eras I and II (2.7% vs 2.5%; P = NS), but morbidity was decreased (15.8% vs 13.8%; P = .02). Specific decreases were noted in sepsis and pulmonary, but not cardiac or renal, complications. When evaluating both eras, modifiable variables (able to be altered by the surgeon) for morbidity included increased length of operation (odds ratio [OR], 1.004; 95% confidence interval [CI], 1.003-1.005; P < .0001), hypertension (OR, 1.46; 95% CI, 1.03-2.1; P = .03), and blood transfusion (OR, 2.8; 95% CI, 2.04-3.88; P < .0001). However, anemic patients (11%; hematocrit <30) who were transfused were less likely to suffer morbidity (OR, 56; 95% CI, 0.47-0.67; P < .0001) than those transfused who were not anemic. The absolute 2% reduction in complications led to a $172 cost savings for the payers per patient in era II compared with era I. CONCLUSION: A statewide quality-of-care consortium with timely feedback of data was associated with decreased morbidity over a relatively short follow-up period in vascular patients. Focusing on best processes in real-world practice, such as appropriate transfusion and length of operation, may further improve vascular surgical outcomes.

PMID: 20719350 [PubMed - as supplied by publisher]

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Progressive postinjury thrombocytosis is associated with thromboembolic complications.

Surgery. 2010 Aug 16;

Authors: Kashuk JL, Moore EE, Johnson JL, Biffl WL, Burlew CC, Barnett C, Sauaia A

BACKGROUND: Our previous investigation demonstrated that despite routine chemoprophylaxis, thrombelastography, which is a comprehensive test measuring the viscoelastic properties of blood, identified a hypercoagulable state in a cohort of critically ill surgical patients that was associated with thromboemobolic events. Furthermore, because thrombelastography allows for the comprehensive assessment of coagulation status, this work suggested that platelet hyperactivity is a component of the hypercoagulable state. We hypothesized that progressive postinjury thrombocytosis contributes to a hypercoagulable state that is associated with thrombelastography. METHODS: One thousand four hundred and forty severely injured patients surviving >48 h were entered into a database prospectively over 12 years. The variables that were evaluated in associated with thrombocytosis (platelet count >450,000) included age, Injury Severity Score, packed red blood cell transfusions in 12 h, and thromboemobolic complications (TE) (deep venous thrombosis, pulmonary embolus, mesenteric thrombosis, stroke, and arterial thrombosis). The time frame for the development of thrombocytosis was assessed at greater or less than 7 days postinjury. Logistic regression was used to identify the independent variables predictive of thrombocytosis and to adjust the association of thrombocytosis with TE for other risk factors. C-statistic was used to assess the discriminative power of thrombocytosis for prediction of TE. RESULTS: The mean age was 37.4 +/- 0.4 years. The Injury Severity Score was 29.3 +/- 0.3, and mean red blood cell transfusions in 12 h was 4.4 +/- 0.2 units. Injury via blunt force occurred in 76% of patients, and 72% of patients were male. Thrombocytosis was identified in 447 (31%) patients and was noted almost exclusively >7 days postinjury (98%). TE developed in 35 (8%) of the 447 patients with thrombocytosis, compared with 45 (4.5%) of the remaining 993 patients who did not develop thrombocytosis. Persistent thrombocytosis >7 days was associated with TE (P > .0001). Logistic regression analysis indicated that when adjusted for intensive care unit duration of stay, transfusions, age, and Injury Severity Score, patients with sustained thrombocytosis more than 3 days were noted to have a 1.4 x increased risk of TE (odds ratio, 1.12; 95% confidence interval, 1.04-1.2; P = .002; C-statistic = 0.82). CONCLUSION: Persistent thrombocytosis in critically injured patients receiving routine chemoprophylaxis is associated with thrombotic complications. Subsequent investigation is warranted to differentiate enzymatic from platelet hypercoagulability to ascertain the role of antiplatelet therapy for prevention of TE.

PMID: 20719351 [PubMed - as supplied by publisher]

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Intestinal malrotation: Varied clinical presentation from infancy through adulthood.

Surgery. 2010 Aug 16;

Authors: Nehra D, Goldstein AM

BACKGROUND: The purpose of this study was to determine the incidence and clinical presentation of intestinal malrotation from infancy through adulthood by examining the experience of a single institution caring for patients of all ages with this condition. METHODS: We conducted a retrospective review on all patients diagnosed with intestinal malrotation at Massachusetts General Hospital between 1992 and 2009. Patient demographics, clinical history, diagnostic tests, operative procedures, and outcome variables were recorded. Patients were divided into 3 age groups: infants (<1 year), children (1-18 years), and adults (18 years). RESULTS: We identified 170 patients, of whom 31% were infants, 21% were children, and 48% were adults. Infants nearly always presented with emesis (93%), whereas adults most commonly presented with abdominal pain (87%), and less often with emesis (37%) or nausea (31%). The incidence of volvulus declined with age, from 37% to 22% to 12%, in each of the 3 age groups, respectively. Although infants were most often diagnosed within hours or days of symptom onset, 59% of children and 32% of adults experienced symptoms for years before diagnosis. Upper gastrointestinal series was the most common imaging study performed in infants and children, but was replaced by abdominal computed tomography in adults. All infants and children underwent a Ladd’s procedure, compared with only 61% of adults. The majority of patients experienced resolution of symptoms after operative intervention, although this decreased slightly with age. CONCLUSION: Intestinal malrotation can occur in patients of any age and, in contrast with traditional teaching, nearly half of these patients may present during adulthood. An increased awareness of this entity and an understanding of its varied presentation at different ages may reduce time to diagnosis and improve patient outcome.

PMID: 20719352 [PubMed - as supplied by publisher]

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Postoperative parathyroid hormone testing decreases symptomatic hypocalcemia and associated emergency room visits after total thyroidectomy.

Surgery. 2010 Aug 17;

Authors: Youngwirth L, Benavidez J, Sippel R, Chen H

BACKGROUND: Symptomatic hypocalcemia, the most common complication of total thyroidectomy, can lead to postoperative emergency room visits for laboratory testing and intravenous calcium infusion. A method to identify patients reliably at risk for postoperative hypocalcemia could allow prophylactic treatment to avoid this. We hypothesized that quick parathyroid hormone testing within 4 hours of thyroidectomy and a protocol to treat parathyroid-hormone-deficient patients would reduce symptomatic hypocalcemia, eliminating the need for emergency room visits. METHODS: After January 1, 2006, 271 consecutive patients underwent total thyroidectomy with postoperative parathyroid hormone testing (group 1). Patients with parathyroid hormone levels <10 pg/mL were treated according to a newly instituted protocol with 0.25-ug calcitriol twice daily and 2-6 g of calcium carbonate daily for 1 week. Patients with parathyroid hormone levels >/=10 pg/mL were treated with calcium only. Group 2 consisted of 100 consecutive patients who underwent total thyroidectomy prior to 2006 without parathyroid hormone testing and were treated according to surgeon preference and serum calcium levels. RESULTS: Patients in the 2 groups were similar with regard to age, sex, and thyroiditis. However, patients in group 1, who had parathyroid hormone testing, had greater postoperative calcium levels (P < .005). Also, patients in group 2 had a higher incidence of malignancy (P = .04). Importantly, patients in group 1 had a lesser incidence of symptomatic hypocalcemia (7% vs 17%; P = .005). Furthermore, the number of patients who made visits to the emergency room was less in patients who had parathyroid hormone testing compared with those who did not (1.8% vs 8.0%; P = .008). CONCLUSION: Postoperative parathyroid hormone testing reliably identifies patients at risk for hypocalcemia after thyroid surgery. Moreover, parathyroid hormone testing and calcitriol administration to patients at risk decreases the incidence of hypocalcemia and associated emergency room visits after total thyroidectomy. Therefore, patients with postoperative serum parathyroid hormone levels <10 pg/mL after thyroid surgery should be treated with calcitriol and calcium to prevent symptomatic hypocalcemia.

PMID: 20723956 [PubMed - as supplied by publisher]

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Exogenous high-mobility group box 1 improves myocardial recovery after acute global ischemia/reperfusion injury.

Surgery. 2010 Aug 17;

Authors: Abarbanell AM, Hartley JA, Herrmann JL, Weil BR, Wang Y, Manukyan MC, Poynter JA, Meldrum DR

BACKGROUND: High-mobility group box 1 (HMGB1) is a mediator of inflammation with dose-dependent effects. In the setting of regional myocardial infarction, a high-dose HMGB1 treatment decreases myocardial function, whereas low-dose HMGB1 improves function; however, it is unknown what role HMGB1 has in the setting of global ischemia/reperfusion (I/R) injury. We hypothesized that a low-dose HMGB1 treatment would improve myocardial functional recovery and decrease infarct size after global I/R injury in association with increased levels of cardioprotective paracrine factors and decreased inflammation. METHODS: Adult rat hearts were isolated and perfused using the Langendorff method and were subjected to global I/R and treatment with either the vehicle, 200-ng HMGB1, or 1-mug HMGB1. The treatment was administered during 1 min at the start of reperfusion, and myocardial function was measured for 60 min of reperfusion. At the end of reperfusion, the hearts were sectioned and incubated in triphenyltetrazolium chloride to assess myocardial infarct size or homogenized to measure levels of inflammatory cytokines and growth factors. RESULTS: Postischemic treatment with 200-ng HMGB1 significantly improved myocardial functional recovery after global I/R in association with decreased infarct size and decreased interleukin-1 (IL-1), IL-6, IL-10, and vascular endothelial growth factor (VEGF) levels. In addition, 1-mug HMGB1 decreased myocardial inflammation but did not result in subsequent improvement in functional recovery. CONCLUSION: In the setting of global I/R, 200-ng postischemic HMGB1 treatment improves myocardial function and decreases infarct size in association with suppressed myocardial inflammation. These results suggest a potential role for exogenous HMGB1therapy in the acute postischemic period.

PMID: 20723957 [PubMed - as supplied by publisher]

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Two-stage brachial-basilic transposition fistula provides superior patency rates for dialysis access in a safety-net population.

Surgery. 2010 Aug 17;

Authors: Gonzalez E, Kashuk JL, Moore EE, Linas S, Sauaia A

BACKGROUND: Guidelines of the National Kidney Foundation recommending aggressive pursuit of autogenous fistulae for dialysis access in lieu of prosthetic arteriovenous grafts have stimulated a renewed interest in transposed brachial-basilic fistulae as an alternative technique for upper arm access in patients who may not be candidates for a lower arm radial-cephalic or forearm brachial-cephalic fistula. We hypothesized that in our safety-net population, where radial-cephalic and brachial-cephalic often are not possible, brachial-basilic would provide patency rates superior to arteriovenous grafts and equivalent to radial-cephalic and brachial-cephalic fistulae. METHODS: We analyzed retrospectively our most recent 2.5-year experience with dialysis access procedures at our metropolitan safety-net hospital. Procedures were grouped as follows: radial-cephalic, brachial-cephalic, brachial-basilic, and arteriovenous grafts. The access outcomes measured were primary failure, time to use, need for intervention, and primary as well as secondary patency. Differences in age, sex, race, renal function (Modification of Diet in Renal Disease), baseline diagnoses (diabetes mellitus, hypertension, coronary artery disease, and peripheral vascular disease), as well as the number of previous accesses, were adjusted in the analysis. Logistic regression was used to identify independent predictors of primary failure, and Kaplan-Meier plots assessed differences in primary patency rates. A log of the time variables was used to approximate normal distribution. RESULTS: In all, 193 patients were included in this study as follows: radial-cephalic, 75 (39%) patients; brachial-cephalic, 35 (18%) patients; brachial-basilic, 33 (17%) patients; and arteriovenous grafts, 50 (26%) patients. Primary patency means differed marginally between groups (P = .08), and when grafts were excluded from the analysis, no difference was found between primary patency in all autogenous fistula techniques (P = .88). Kaplan-Meier plots showed that when analyzing the first 35 weeks, a significantly lower primary patency among graft recipients early after the procedure was noted, and a higher performance of BB after 20 weeks was noted (log-rank P = .05, Wilcoxon P = .004). Furthermore, secondary patency did not vary significantly between groups (P = .62). Radial-cephalic were more likely to fail primarily when compared with the other access groups (P = .03), and in a univariate analysis, underlying hypertension was associated with a lower risk of primary failure (P = .01) compared with other diagnoses. A logistic regression stepwise selection showed that the underlying diagnoses of peripheral vascular disease, diabetes mellitus, or coronary artery disease were associated with a greater risk of primary failure compared with those with HTN (P = .001; odds ratio, 4.05; 95% confidence interval, 1.71-9.59), as well as the presence of a previously failed access (P = .04; odds ratio, 2.39; 95% confidence interval, 1.08-5.67). CONCLUSION: In a safety-net population, our results suggest that 2-stage brachial-basilic transposition fistulae provide patency rates equivalent to brachial-cephalic and radial-cephalic fistulae and superior to grafts. Although 2 procedures are required, brachial-basilic fistulae provide a reliable access and should be considered the next choice when radial-cephalic and/or brachial-cephalic are not possible.

PMID: 20723958 [PubMed - as supplied by publisher]

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Early gastric cancer with signet-ring cell histologic type: Risk factors of lymph node metastasis and indications of endoscopic surgery.

Surgery. 2010 Aug 19;

Authors: Tong JH, Sun Z, Wang ZN, Zhao YH, Huang BJ, Li K, Xu Y, Xu HM

BACKGROUND: To clarify the biologic behavior of the early signet-ring cell cancers (SRCs) by comparing the clinicopathologic features and the incidence of lymph node metastasis between different histologic types of early gastric cancer (EGC) and to propose the indications of endoscopic surgery for SRCs. METHODS: Clinicopathologic features and the incidence of lymph node metastasis of 422 EGCs were retrospectively reviewed and compared according to the histologic type. RESULTS: Clinicopathologic features, incidence of node metastasis, prognosis, as well as the incidence of recurrence for SRCs, were similar to those of differentiated cancers (DCs), however, significantly different from those of undifferentiated cancers (UDCs). Tumor size, histologic type, lymphatic and/or blood vessel invasion (LBVI), and depth of invasion were independent factors predicting node metastasis for EGCs. For DCs and SRCs with mucosal invasion and </=2 cm in diameter without LBVI, no metastatic lymph node was detected (95% CI, 0-5.0). Also, for DCs and SRCs with mucosal invasion and >2 cm in diameter without LBVI, or with submucosal invasion and </=2 cm in diameter without LBVI, no metastatic lymph node was detected (95% CI, 0-3.0). CONCLUSION: Clinicopathologic features of SRCs were similar with DCs, but different from other UDCs. Consequently, the treatment strategy for SRCs might be similar with that for DCs. According to the incidence of node metastasis, we propose SRCs with mucosal invasion without LBVI, or with submucosal invasion and </=2 cm in diameter without LBVI, might be suitable for endoscopic surgery.

PMID: 20727560 [PubMed - as supplied by publisher]

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Development of a novel method of progressive temporary abdominal closure.

Surgery. 2010 Aug 19;

Authors: Goodman MD, Pritts TA, Tsuei BJ

BACKGROUND: This paper describes our experience with a novel method of temporary abdominal closure that permits frequent reassessment of the abdominal contents and progressive reapproximation of the fascial edges without compromising definitive fascial closure outcomes. METHODS: We developed a novel method of temporary abdominal closure, which we have named the frequent assessment temporary abdominal closure (FASTAC). The records of patients who underwent planned relaparotomy during 5 years were reviewed. The data collected included patient demographics, indication for operation, number of operations, duration of temporary abdominal closure placement, hospital duration of stay, method of definitive abdominal closure, and subsequent ventral hernia repair. RESULTS: One hundred and thirty-three patients underwent 308 temporary abdominal closure placements, including 16 patients who had a FASTAC placed for open abdomen management. FASTAC remained in place for a significantly greater time with more frequent reassessment. Fascial closure techniques were not different in FASTAC patients. FASTAC patients had a significantly greater duration of stay, which suggests selective placement in a more complicated patient population. The materials for frequent assessment temporary abdominal closure cost only $38 compared with $350 for a large piece of Silastic. CONCLUSION: FASTAC is a novel, cost-effective method of temporary abdominal closure that allows for frequent bedside intra-abdominal surveillance, maintains abdominal domain, and does not compromise abdominal closure outcomes in the management of the open abdomen.

PMID: 20727561 [PubMed - as supplied by publisher]

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Antiplatelet agents, warfarin, and epidemic intracranial hemorrhage.

Surgery. 2010 Aug 19;

Authors: Siracuse JJ, Robich MP, Gautum S, Kasper EM, Moorman DW, Hauser CJ

BACKGROUND: Atrial fibrillation prophylaxis with warfarin and strong antiplatelet agent use in cardiovascular diseases has increased the incidence of anticoagulation in the elderly. We studied traumatic intracranial hemorrhage (TICH) in patients >/=55 years of age on anticoagulation and antiplatelet agents in a stable population. METHODS: We used a Level 1 Trauma Center registry study comparing TICH in patients on anticoagulation drugs during the index periods 1999 to 2000 (T1) and 2007 to 2008 (T2). RESULTS: A total of 526 TICH patients were seen in T1 and T2 (age, 77.6 vs 77.5 years; not significant [NS]), with the rate doubling from 6.2% to 12.3% of all trauma activations (P < .01). There was no increase in atrial fibrillation, warfarin use, or CHADS(2) scores in atrial fibrillation patients on anticoagulation therapy. TICH in patients taking antiplatelet agents increased 5-fold (2.2 % vs 10.3%; P < .01). Overall TICH mortality rate was the same (12.4% vs 12.2%, NS). TICH mortality among patients on therapeutic warfarin was greater in T1 (26%; P < .05), but mortality was similar to TICH in patients not on anticoagulants in T2 (19% vs 12.2%, NS), suggesting treatment improved. Prevalence and mortality of TICH in patients on antiplatelet agents were similar to TICH in patients on warfarin. CONCLUSION: TICH in patients on anticoagulants is epidemic in patients >/=55 years of age. Despite national trends, our well-served population has not seen an increase in warfarin use for atrial fibrillation. Instead, use of antiplatelet agents has increased and is associated with an increased incidence of TICH.

PMID: 20727562 [PubMed - as supplied by publisher]

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Collateral damage: The effect of patient complications on the surgeon’s psyche.

Surgery. 2010 Aug 19;

Authors: Patel AM, Ingalls NK, Mansour MA, Sherman S, Davis AT, Chung MH

BACKGROUND: The effect of patient complications on physicians is not well understood. Our objective was to determine the impact of a surgeon’s complication(s) on his/her emotional state and job performance. METHODS: An anonymous survey was distributed to Midwest Surgical Society members and attending surgeons within the Grand Rapids, Michigan, community. RESULTS: There were 123 respondents (30.5% response rate). For the majority of participants, the first complication that had a significant emotional impact on them occurred during residency (51.2%). Most respondents reported this did not impair their professional functioning (77.2%). If a major complication was first experienced after residency, this had a greater likelihood of causing impairment (P < .05). Surgeons primarily dealt with the emotional impact by discussing it with a surgical partner (87.8%). Alcohol or other substance use increased in 6.5% of those surveyed. Most respondents (58.5%) felt it was difficult to handle the emotional effects of complications throughout their careers and this did not improve with experience. CONCLUSION: The majority of surgeons agreed that it was difficult to handle the emotional effects of complications throughout their careers. Efforts should be made to increase awareness of unrecognized emotional effects of patient complications and improve access to support systems for surgeons.

PMID: 20727563 [PubMed - as supplied by publisher]

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Gastroesophageal reflux disease after lung transplantation: Pathophysiology and implications for treatment.

Surgery. 2010 Aug 19;

Authors: Davis CS, Shankaran V, Kovacs EJ, Gagermeier J, Dilling D, Alex CG, Love RB, Sinacore J, Fisichella PM

BACKGROUND: Gastroesophageal reflux disease (GERD) is thought to be a risk factor for the development or progression of chronic rejection after lung transplantation. However, the prevalence of GERD and its risk factors, including esophageal dysmotility, hiatal hernia and delayed gastric emptying after lung transplantation, are still unknown. In addition, the prevalence of Barrett’s esophagus, a known complication of GERD, has not been determined in these patients. The purpose of this study was to determine the prevalence and extent of GERD, as well as the frequency of these risk factors and complications of GERD in lung transplant patients. METHODS: Thirty-five consecutive patients underwent a combination of esophageal function testing, upper endoscopy, barium swallow, and gastric emptying scan after lung transplantation. RESULTS: In this patient population, the prevalence of GERD was 51% and 22% in those who had been retransplanted. Of patients with GERD,36% had ineffective esophageal motility (IEM), compared with 6% of patients without GERD (P = .037). No patient demonstrated hiatal hernia on barium swallow. The prevalence of delayed gastric emptying was 36%. The prevalence of biopsy-confirmed Barrett’s esophagus was 12%. CONCLUSION: Our study shows that, after lung transplantation, more than half of patients had GERD, and that GERD was more common after retransplantation. IEM and delayed gastric emptying are frequent in patients with GERD. Hiatal hernia is rare. The prevalence of Barrett’s esophagus is not negligible. We conclude that GERD is highly prevalent after lung transplantation, and that delayed gastric emptying and Barrett’s esophagus should always be suspected after lung transplantation because they are common risks factors and complications of GERD.

PMID: 20727564 [PubMed - as supplied by publisher]

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Decreased contractile response to endothelin-1 of peripheral microvasculature from diabetic patients.

Surgery. 2010 Aug 19;

Authors: Feng J, Liu Y, Khabbaz KR, Hagberg R, Robich MP, Clements RT, Bianchi C, Sellke FW

BACKGROUND: We compared the contractile responses to endothelin-1 (ET-1) with and without the inhibition of ET-A receptors and protein kinase C-alpha (PKC-alpha) in the human peripheral microvasculature of diabetic and case-matched, nondiabetic patients. METHODS: Chest wall skeletal muscle was harvested from patients with and without diabetics undergoing cardiac surgery. Peripheral arterioles (90-180 mum in diameter) were dissected from the harvested tissue. Microvascular constriction was assessed by videomicroscopy in response to ET-1 with and without an endothelin-A (ET-A) receptor antagonist, an endothelin B (ET-B) antagonist, or a PKC-alpha inhibitor. RESULTS: ET-1 induced a dose-dependent contractile response of skeletal muscle arterioles from diabetic and nondiabetic patients. The contractile response of diabetic arterioles from both prebypass and postbypass to ET-1 (10(-9) mol/L) was decreased compared with those of nondiabetic patients (P < .05). The contractile responses of microvessels of both diabetics and nondiabetics to ET-1 were inhibited in the presence of either ET-A receptor antagonist BQ123 (10(-7) mol/L) or the PKC-alpha inhibitor safingol (2 x 10(-5) mol/L, P < .05, respectively). In contrast, the ET-1-induced vasoconstriction was not affected by the administration of the ET-B receptor antagonist BQ788 (10(-7) mol/L). There were no differences in skeletal muscle levels of the ET-A and ET-B receptors between diabetic and nondiabetic groups. CONCLUSION: Diabetic patients demonstrated a decreased contractile response to ET-1 in human peripheral microvasculature. The contractile response of diabetic vessels to ET-1 occurs via activation of ET-A receptors and PKC-alpha. These results provide novel mechanisms of ET-1-induced contraction in vasomotor dysfunction in patients with diabetes.

PMID: 20727565 [PubMed - as supplied by publisher]

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Review of outcomes of primary liver cancers in children: Our institutional experience with resection and transplantation.

Surgery. 2010 Aug 19;

Authors: Malek MM, Shah SR, Atri P, Paredes JL, Dicicco LA, Sindhi R, Soltys KA, Mazariegos GV, Kane TD

BACKGROUND: Operative intervention plays an important role in the management of primary liver cancers in children. Recent improvements in diagnostic modalities, pre- and postoperative chemotherapy, and operative technique have all led to improved survival in these patients. Both hepatic resection and orthotopic liver transplantation are effective operations for pediatric liver tumors; which intervention is pursued is based on preoperative extent of disease. This is a review of our institution’s experience with operative management of pediatric liver cancer over an 18-year period. METHODS: A retrospective chart review from 1990 to 2007 identified patients who were </=18 years old who underwent operative intervention for primary liver cancer. Demographics, type of operation, intraoperative details, pre- and postoperative management, as well as outcomes were recorded for all patients. RESULTS: Fifty-four patients underwent 57 operations for primary liver cancer, 30 of whom underwent resection; the remaining 27 underwent orthotopic liver transplantation. The mean age at diagnosis was 41 months. Twenty patients had stage 1 or 2 disease and 34 patients had stage 3 or 4 disease. Forty-eight (89%) patients received preoperative chemotherapy. Postoperative chemotherapy was given to 92% of patients. Mean overall and intensive care unit duration of stay were 18 and 6 days, respectively. About 45% of patients had a postoperative complication, including hepatic artery thrombosis (n = 8), line sepsis (n = 6), mild acute rejection (n = 3), biliary stricture (n = 2), pneumothorax (n = 2), incarcerated omentum (n = 1), Horner’s syndrome (n = 1), and urosepsis (n = 1). Only 6 patients had a recurrence of their cancer, 5 after liver resection, 3 of whom later received a transplant. There was only 1 recurrence after liver transplantation. There was 1 perioperative mortality from cardiac arrest. Overall survival was 93%. CONCLUSION: Operative intervention plays a critical role in the management of primary liver cancer in the pediatric population. Neoadjuvant chemotherapy can be given if the tumor seems unresectable at diagnosis. If chemotherapy is unable to sufficiently downstage the tumor, orthotopic liver transplantation becomes the patient’s best option. Our institution has had considerable experience with both resection and liver transplantation in the treatment of pediatric primary liver cancer, with good long-term outcomes.

PMID: 20728194 [PubMed - as supplied by publisher]

Time from diagnosis to definitive operative treatment of operable breast cancer in the era of multimodal imaging.

Surgery. 2010 Aug 13;

Authors: Hulvat M, Sandalow N, Rademaker A, Helenowski I, Hansen NM

BACKGROUND: The primary objective of this study was to determine if the increasing use of multimodal breast imaging has influenced the time between the diagnosis of an operable breast cancer and definitive operative intervention over the past decade. Secondary objectives were to determine whether a higher number of imaging studies, or specifically magnetic resonance images (MRIs) were independent predictors of a longer treatment delay, or lead to a greater chance of having a mastectomy. METHODS: We retrospectively reviewed patients treated at a large, academic medical center with operable breast cancer between February 1, 1998, and August 31, 2008. RESULTS: Time to treatment significantly increased over the study time period (mean of 21.8 days in 1998, 31.3 days in 2003, 41.1 days in 2008). In 2008, the only study year in which MRI was routinely used, patients with an MRI had a longer median time to treatment of 43 days versus 32 days for those who did not (P = .054). Those who had a preoperative MRI had a higher relative risk of having a mastectomy at 1.8 (95% confidence interval, 0.85-3.76; P = .33), although this result did not reach significance. CONCLUSION: The time to treatment of operable breast cancer has increased over the past 10 years, and multimodal breast imaging is likely associated with this increase. The effect of this increase on the type of operative procedure chosen and the impact on subsequent outcomes is unknown.

PMID: 20708761 [PubMed - as supplied by publisher]

Catastrophic antiphospholipid syndrome (Asherson’s syndrome) presenting with a splenic rupture.

Surgery. 2010 Aug 12;

Authors: Okano K, Oshima M, Kakinoki K, Dobashi H, Suzuki Y

PMID: 20708762 [PubMed - as supplied by publisher]

Endoscopic, endoluminal fundoplication for gastroesophageal reflux disease: Initial experience and lessons learned.

Surgery. 2010 Aug 13;

Authors: Velanovich V

BACKGROUND: Several devices have been developed to create an antireflux barrier endoscopically for the treatment of gastroesophageal reflux disease. All have failed to provide long-term symptom relief, were associated with clinically important complications, or were otherwise removed from the market. A new device, the Esophyx (Endogastric Solutions, Redmond, WA), provides the closest approximation experimentally to a standard Belsy fundoplication. This report describes an initial experience with this device. METHODS: Patients considered candidates for endoscopic fundoplication include those with symptomatic gastroesophageal reflux disease, a small (<2 cm) hiatal hernia, objective pathologic evidence of gastroesophageal reflux disease, and an absence of other esophageal motility disorders. The procedure was conducted under general anesthesia with a surgeon operating the device and an endoscopist operating the gastroscope. H-fasteners were placed from the esophagus to the gastric cardia with the goal of creating an approximately 270-300 degrees fundoplication approximately 3-4 cm in length. Symptom severity was measured with the GERD-HRQL instrument (best possible score 0, worst possible score 50). The patients were followed-up for complications and symptom improvement. RESULTS: In all, 26 patients underwent an attempted endoscopic fundoplication. Two patients could not be completed because of the inability to pass the device. Of the 24 patients who underwent endoscopic fundoplication, 20 had the typical symptoms of gastroesophageal reflux disease, 4 had symptoms of laryngopharyngeal reflux, and 4 had recurrent symptoms after a Nissen fundoplication. There was 1 major complication of a gastric mucosal tear that led to bleeding and the need for a blood transfusion. Nineteen (79%) patients reported satisfaction with their symptom relief. Of those dissatisfied, 2 had symptoms of laryngopharyngeal reflux, 1 had functional heartburn, 1 had associated gastroparesis, and 1 had clear failure with gastroesophageal reflux disease. The median GERD-HRQL score improved from 25 (interquartile range, 19.5-28.5) to 5 (interquartile range, 3-9; P = .0004). CONCLUSION: Endoscopic fundoplication with the Esophyx device is feasible with satisfactory initial results. Endoscopic fundoplication seems to be best suited for patients with small hiatal hernias and mild-to-moderate typical symptoms; however, subsequent trials are needed to assess the long-term effectiveness of the technique.

PMID: 20708763 [PubMed - as supplied by publisher]

A single institution’s experience with single incision cholecystectomy compared to standard laparoscopic cholecystectomy.

Surgery. 2010 Aug 13;

Authors: Fronza JS, Linn JG, Nagle AP, Soper NJ

BACKGROUND: The advent of single incision laparoscopic surgery has brought renewed attention to cholecystectomy due to the promise of improved cosmesis and less parietal trauma. Small series have demonstrated the feasibility of single incision laparoscopic cholecystectomy (LC). Our series adds to the literature by demonstrating a variety of ancillary techniques that may be employed to perform single incision LC safely, and compares our early experience with that of our standard LC. METHODS: We performed a retrospective chart review of patients who underwent single incision LC between February 2008 and April 2009. These patients were compared with an equal number of randomly selected patients undergoing LC during the same period. We identified 25 attempted single incision LC, which were included in our analysis. RESULTS: Single incision LC was successfully performed in 21 patients, with only 4 patients requiring conversion to LC. No patients in either group had acute cholecystitis. The critical view of safety was documented in 20 of 21 patients undergoing a successful single incision LC compared with all patients undergoing LC. Operative time was significantly longer in the single incision group. Complications were minor and comparable between the 2 groups. In 9 patients (43%) a suture passer helped to retract the gallbladder. In 8 patients (38%) 1 or 2 Prolene sutures placed by means of a Keith needle helped to retract the gallbladder over the liver and/or helped to retract the infundibulum. In 2 patients, >/=1 supplemental 5-mm port was utilized. In 5 patients (24%), no supplementary retraction was necessary. CONCLUSION: Single incision LC is technically more challenging than LC, but can be performed safely by experienced laparoscopic surgeons with results comparable with LC.

PMID: 20708764 [PubMed - as supplied by publisher]

Pseudoangiomatous stromal hyperplasia of the breast: A contemporary approach to its clinical and radiologic features and ideal management.

Surgery. 2010 Aug 13;

Authors: Gresik CM, Godellas C, Aranha GV, Rajan P, Shoup M

BACKGROUND: Pseudoangiomatous stromal hyperplasia (PASH) is a benign, proliferative lesion of the breast whose clinical relevance, presentation, and optimal treatment remains described incompletely. The purpose of this study is to review the clinical, radiologic, and histopathologic features and appropriate management. METHODS: Patients diagnosed with PASH were identified from our pathology database between 2000 and 2009. Clinicopathologic data including presentation, diagnosis, imaging, and histology were reviewed. All specimens were confirmed by a single pathologist. RESULTS: We identified PASH in 80 patients. Median follow-up was 3.71 years (range, 0.45-9.42). Age ranged from 12 to 65 (median, 45) and 95% were female. Lesions were palpable in 56% and found on imaging in the remainder. Core biopsy was performed in 65 of 80 patients (81%), which confirmed a diagnosis of PASH in 65%. The other 23 of 65 patients (35%) required operative excision for diagnosis. There was a progression rate of 26% in the observation arm versus 13% in the excision arm. A diagnosis of cancer or carcinoma in situ was seen in 30% at or before the diagnosis of PASH. CONCLUSION: PASH may present as a mass, radiologic lesion, or incidentally in pathology specimens. It may be associated with cancerous or precancerous lesions. A diagnosis on core biopsy in the absence of suspicious radiologic features may be managed with follow-up and imaging at a 6-month interval. In this series, 35% of patients with PASH had a negative core biopsy. Growth, suspicious radiologic findings, or inconclusive biopsy warrants surgical excision. Close surveillance is necessary given its recurrence rate of 13-26%.

PMID: 20708765 [PubMed - as supplied by publisher]

Esophagogastroduodenoscopy-associated gastrointestinal perforations: A single-center experience.

Surgery. 2010 Aug 13;

Authors: Merchea A, Cullinane DC, Sawyer MD, Iqbal CW, Baron TH, Wigle D, Sarr MG, Zielinski MD

BACKGROUND: Esophagogastroduodenoscopy (EGD) is commonly used in the diagnosis and treatment of gastrointestinal (GI) disorders. Our aim was to define the risk of perforation associated with EGD and identify patients who required operative intervention. METHODS: We retrospectively reviewed 72 patients from our institution plus 5 transferred patients who sustained EGD-associated perforations from January 1996 through July 2008. Percutaneous endoscopic gastrostomy, endoscopic ultrasonography, endoscopic retrograde cholangiopancreatography, transthoracic echocardiography, and concurrent colonoscopy procedures were excluded. RESULTS: Perforations in 72 of 217,507 EGD procedures were identified (incidence, 0.033%); 124,844 EGDs included an interventional procedure and 92,663 were examination only. The incidence of perforation was similar whether an interventional procedure was performed or not (0.040% vs 0.029%; P = .181). The esophagus was injured most commonly (51%), followed by the duodenum (32%), jejunum (6%), stomach (3%), and common bile duct (3%). Overall mortality after perforation was 17% with a morbidity rate of 40%. Thirty-eight patients (49%) were initially treated nonoperatively, 7 of whom (18%) failed nonoperative management. The only factors we could determine that were associated with failure were free fluid or contrast extravasation on computed tomography (75% vs 23% [P < .005] and 33% vs 0% [P = .047], respectively). The morbidity of failures was equivalent to those who underwent initial operative management (63% vs 61%; P = .917), with mortality seeming to be greater (43% vs 21%; P = .09). CONCLUSION: EGD is safe in the majority of patients; however, iatrogenic perforation is associated with considerable morbidity and mortality. Nonoperative management of GI perforation can be successful if there is no evidence of contrast extravasation or free fluid on radiographic studies. If nonoperative management fails, the outcomes may be worse than those treated initially with operative repair.

PMID: 20708766 [PubMed - as supplied by publisher]

Trends in age for hepatoportoenterostomy in the United States.

Surgery. 2010 Aug 13;

Authors: Raval MV, Dzakovic A, Bentrem DJ, Reynolds M, Superina R

BACKGROUND: Biliary atresia is a rare but devastating disease for which hepatoportoenterostomy remains the primary intervention. Increased age at the time of hepatoportoenterostomy is associated with unfavorable outcomes. In this study, we examined trends in age at the time of hepatoportoenterostomy and explored hospital and patient factors associated with more timely diagnosis and treatment. METHODS: Median ages of patients undergoing hepatoportoenterostomy for biliary atresia were compared using the Kids’ Inpatients Database from 1997, 2000, 2003, and 2006. The patient and hospital factors associated with later treatment were compared. RESULTS: Of 192 patients, 13.5% had surgery in 1997, 13.5% in 2000, 36.5% in 2003, and 36.5% in 2006. The overall median age was 65.5 days; the median age was 64 days in 1997, 57.5 days in 2000, 69 days in 2003, and 64 days in 2006 (P = .80). Overall, 71% of patients were treated at non-children’s hospitals, and although the proportion has increased over time, the trend did not reach significance (P = .12). Hispanic and African American patients were more likely to undergo hepatoportoenterostomy after 60 days of life compared with white patients (Hispanic patients: odds ratio, 3.6; 95% confidence interval, 1.1-12.5; P = .04; African American patients: odds ratio, 2.2; 95% confidence interval, 0.8-6.3; P = .14). Compared with specialized children’s centers, treatment at non-children’s hospitals was associated with delayed hepatoportoenterostomy (odds ratio, 3.5; 95% confidence interval, 1.2-9.8; P = .02). CONCLUSION: Although early hepatoportoenterostomy is associated with improved outcomes for children with biliary atresia, our study shows the median age at surgery has not significantly changed over 2 decades. Both hospital and socioeconomic factors play a role in the early treatment of biliary atresia.

PMID: 20709342 [PubMed - as supplied by publisher]

Malpractice litigation after thyroid surgery: The role of recurrent laryngeal nerve injuries, 1989-2009.

Surgery. 2010 Aug 13;

Authors: Abadin SS, Kaplan EL, Angelos P

BACKGROUND: Recurrent laryngeal nerve injuries remain a complication that is a source of concern to both surgeons and patients. RLN monitoring has gained popularity in recent years despite a lack of evidence showing decreased rates of recurrent laryngeal nerve injury when nerve monitoring is used. We sought to explore malpractice litigation in thyroid surgery with respect to recurrent laryngeal nerve monitoring. With increased public awareness and surgeon use of recurrent laryngeal nerve monitoring, we hypothesize an increase in its use in malpractice litigation in the area of thyroid surgery. METHODS: Using the LexisNexis Academic legal database, a retrospective review of all relevant federal and state cases from 1989 to 2009 was performed using the search terms “thyroid,” “surgery,” and “medical malpractice.” From this search, data were compiled including year and state of the court’s decision, the outcome of the trial, the type of complication, any mention of recurrent laryngeal nerve monitoring, and the specialty of the surgeon who performed the procedure. The cases that were settled out of court were not included in this analysis. RESULTS: A total of 143 medical malpractice cases involving thyroid surgery were retrieved from our search from 1989 to 2009. After reviewing all cases, 33 cases in which the alleged negligence occurred after thyroid surgery were used for analysis. Of these cases, 15 involved recurrent laryngeal nerve injury; interestingly, no mention of recurrent laryngeal nerve monitoring was noted in any of the cases. CONCLUSION: Although recurrent laryngeal nerve monitoring has become more widely available and used, there is no evidence that its use or nonuse has played a role in malpractice litigation in the last 20 years. recurrent laryngeal nerve injury remains a cause of malpractice litigation.

PMID: 20709343 [PubMed - as supplied by publisher]

Incidental radiographic findings after injury: Dedicated attention results in improved capture, documentation, and management.

Surgery. 2010 Aug 11;

Authors: Sperry JL, Massaro MS, Collage RD, Nicholas DH, Forsythe RM, Watson GA, Marshall GT, Alarcon LH, Billiar TR, Peitzman AB

BACKGROUND: With liberal use of computed tomography in the diagnostic management of trauma patients, incidental findings are common and represent a major patient-care and medical-legal concern. Consequently, we began an initiative to capture, notify, and documentadequately incidental finding events with a dedicated incidental finding coordinator. We hypothesized a dedicated incidental finding coordinator would increase incidental finding capture and promote notification, follow-up, and documentation of incidental finding events. METHODS: A quality-improvement project to record and follow-up incidental findings postinjury was initiated at our level I trauma center (April 2007-March 2008, prededicated incidental finding). Because of concerns for inadequate documentation of identified incidental finding events, we implemented a dedicated incidental finding coordinator (April 2008-March 2009, postdedicated incidental finding). The dedicated incidental finding coordinator documented incidental findings daily from trauma admission radiology final reads. Incidental findings were divided into 3 groups, category 1: attention prior to discharge; category 2: follow-up with primary doctor within 2 weeks; category 3: no specific follow-up. For category 1 incidental findings, in-hospital consultation of the appropriate service was verified. On discharge, patient notification, follow-up, and documentation of events were confirmed. Certified mail or telephone contact was used to notify either the patient or the primary doctor in those who lacked appropriate notification or documentation. RESULTS: Admission rates and incidental finding categories were similar across the 2 time periods. Implementation of a dedicated incidental finding coordinator resulted in more than a 165% increase in incidental finding capture (n = 802 vs n = 302, P < .001). Patient notification was attempted, and appropriate documentation of events was confirmed in 99.8% of patients. Patient notification was verified, and follow-up was initiated in 95.8% of cases. CONCLUSION: The implementation of a dedicated incidental finding coordinator resulted in more than a 2.5-fold higher capture of incidental findings. Dedicated attention to incidental findings resulted in a near complete initiation of patient notification, follow-up, and hospital record documentation of incidental finding events. Inadequate patient notification and follow-up would delay appropriate care and potentially would result in morbidity or even mortality. A dedicated incidental finding coordinator represents a potential solution to this patient-care and medical-legal dilemma.

PMID: 20705305 [PubMed - as supplied by publisher]

Verification of proficiency in basic skills for postgraduate year 1 residents.

Surgery. 2010 Aug 11;

Authors: Sanfey H, Ketchum J, Bartlett J, Markwell S, Meier AH, Williams R, Dunnington G

BACKGROUND: The American College of Surgeons and Association of Program Directors in Surgery Phase 1 curriculum involves basic surgical skills instructional modules and Verification of Proficiency. This article is a study and revision of beta versions of the Verification of Proficiency instruments. METHODS: Postgraduate year 1 residents were tested on 11 skills after undergoing lab instruction and practice. Deidentified videotaped performances were scored and data were analyzed to identify correlations between individual checklist items and failure. RESULTS: In all, 23 residents underwent Verification of Proficiency over 2 years; 8 (35%) passed all Verification of Proficiency examinations at the first attempt, 15 (65%) failed at least 1 module, and 11 (48%) failed at least 2 modules. Residents who failed to demonstrate proficiency underwent mandatory remediation and retested until their scores were considered proficient. Scrutiny of the results revealed checklist items that were predictive independently of overall failure. The pass rate was significantly greater in 2009 compared with 2008 after the introduction of rater training and consequences for failure. CONCLUSION: Verification of Proficiency provides a framework to evaluate learner progress toward skills proficiency. That we achieved 100% faculty compliance with more than 250 performances speaks to the feasibility of Verification of Proficiency. This approach should facilitate a more widespread Verification of Proficiency acceptance as a step closer to developing a final proficiency examination for basic surgical skills in postgraduate year 1 residents.

PMID: 20705306 [PubMed - as supplied by publisher]

Do preclinical background and clerkship experiences impact skills performance in an accelerated internship preparation course for senior medical students?

Surgery. 2010 Aug 11;

Authors: Zeng W, Woodhouse J, Brunt LM

BACKGROUND: Dedicated skills courses may help to prepare 4th-year medical students for surgical internships. The purpose of this study was to analyze the factors that influence the preparedness of 4th-year medical students planning a surgical career, and the role that our skills course plays in that preparedness. METHODS: A comprehensive skills course for senior medical students matching in a surgical specialty was conducted each spring from 2006 through 2009. Students were surveyed for background skills, clerkship experience, and skills confidence levels (1-5 Likert scale). Assessment included 5 suturing and knot-tying tasks pre- and postcourse and a written examination. Data are presented as mean values +/- standard deviations; statistical analyses were by 2-tailed t test, linear regression, and analysis of variance. RESULTS: Sixty-five 4th-year students were enrolled; most common specialties were general surgery (n = 22) and orthopedics (n = 16). Thirty-five students were elite musicians (n = 16) or athletes (n = 19) and 8 regular videogamers. Suturing task times improved significantly from pre- to postcourse for all 5 tasks (total task times pre, 805 +/- 202 versus post, 627 +/- 168 seconds [P < .0001]) as did confidence levels for 8 skills categories, including management of on-call problems (P < .05). Written final examination proficiency (score >/=70%) was achieved by 81% of students. Total night call experience 3rd year was 23.3 +/- 10.7 nights (7.3 +/- 4.3 surgical call) and 4th year 10.5 +/- 7.4 nights (7.2 +/- 6.8 surgical call). Precourse background variables significantly associated with outcome measures were athletics with precourse suturing and 1-handed knot tying (P < .05); general surgery specialty and instrument tying (P = .012); suturing confidence levels and precourse suturing and total task times (P = .024); and number of nonsurgical call nights with confidence in managing acute on-call problems (P = .028). No significant correlation was found between these variables and postcourse performance. CONCLUSION: Completion of an accelerated skills course results in comparable levels of student performance postcourse across a variety of preclinical backgrounds and clerkship experiences.

PMID: 20705307 [PubMed - as supplied by publisher]

Dr John W. Kirklin (1917-2004): A unique surgeon.

Surgery. 2010 Aug 11;

Authors: Aldrete JS

PMID: 20705308 [PubMed - as supplied by publisher]

2010: The surgical odyssey continues…

Surgery. 2010 Aug;148(2):165-70

Authors: Geller DA

PMID: 20633724 [PubMed - indexed for MEDLINE]

Role of the VA in training surgical scientists.

Surgery. 2010 Aug;148(2):171-7

Authors: Berger DH, Balentine CJ

PMID: 20633725 [PubMed - indexed for MEDLINE]

The association of acute aortic dissection with Helicobacter pylori virulence specific serotypes: Distinct diversity of systemic antibodies to CagA and VacA genotypes.

Surgery. 2010 Aug 3;

Authors: Mannacio VA, De Amicis V, Di Tommaso L, Stassano P, Iorio F, Vosa C

BACKGROUND: Previous studies reported an association between chronic Helicobacter pylori infection and cardiovascular disease; however, controversy still exists regarding the presence of bacterial genomic material in atherosclerotic plaques. Currently, the genetic polymorphisms of H. pylori have been investigated and many virulence factors have been identified. No one has tried to associate these polymorphisms with aortic dissections. This study evaluated whether more virulent strains of H. pylori represent a risk factor for acute ascending aorta dissections. METHODS: The serologic status for H. pylori and type I strains were determined in 100 patients who underwent operative repair of acute, ascending aorta dissection and in 100 population-based control subjects matched fully for clinical, demographic, and socioeconomic characteristics. The specimens from dissected aorta were evaluated to identify the presence of bacterial genomic material in surgical patients. RESULTS: No evidence of genomic material from H. pylori was found in the specimens. The prevalence of positive H. pylori serology was greater in patients than in controls (72 vs 50) with an adjusted odds ratio 2.8 (95% confidence interval, 1.8-4.1; P = .006). Patients with aortic dissection also had a greater prevalence of vacuolating cytotoxin gene subtypes s1m1 (73% vs 31%) with an odds ratio of 6.0 (95% confidence interval, 3.1-11; P < .001). Patients who were positive for vacuolating cytotoxin gene subtypes s1m1 were similar in demographic and clinical features compared with other patients. CONCLUSION: The findings provide support for the hypothesis that an association exists between the more virulent type I strains of H. pylori (vacuolating cytotoxin gene subtypes s1m1) infection and acute aortic dissection. The mechanism(s) underlying the association remain to be elucidated.

PMID: 20684964 [PubMed - as supplied by publisher]

Chronic pancreatitis complicated by cavernous transformation of the portal vein: Contraindication to surgery?

Surgery. 2010 Aug 3;

Authors: Bockhorn M, Gebauer F, Bogoevski D, Molmenti E, Cataldegirmen G, Vashist YK, Yekebas EF, Izbicki JR, Mann O

BACKGROUND: A subgroup of patients with chronic pancreatitis and severe incapacitating pain develop mesentericoportal vascular complications with extrahepatic portal hypertension (EPH) and subsequent cavernous transformation. The purpose of this study was to address the question of whether a noninterventional approach regarding surgery is justified. METHODS: A total of 702 patients with chronic pancreatitis underwent major pancreatic surgery. EPH with cavernous transformation was diagnosed in 21 (3%; group C) and EPH without cavernous transformation in 60 (9%; group B). The remaining 621 patients (88%; group A) showed no evidence for extrahepatic hypertension or cavernous transformation. Prospectively collected data were analyzed with respect to perioperative parameters, outcomes, quality of life, and our previously established pain score. RESULTS: Patients in groups C and B had longer history and greater severity of pain (P = .0001). Group C had the longest operative times (P > .05) and greatest requirements of intraoperatively transfused packed red blood cells (P < .05). Morbidity was greater in group C compared with groups B and A (88% vs 55% vs 35%; P < .001). Mortality was 10% (2/21) in group C, compared with 1.3% (8/621) in group A and 0% in group B (P = .008). Quality of life as well as pain scores significantly improved postoperatively in group C, and were comparable to those in groups A and B (P < .001). CONCLUSION: Concomitant cavernous transformation in patients with chronic pancreatitis increases the operative risk significantly. Alternative treatment modalities should be evaluated thoroughly in every individual patient to offer every patient the best available treatment. Nevertheless, operative intervention is often the only treatment possible and improvements in quality of life and pain alleviation justify operative interventions.

PMID: 20684965 [PubMed - as supplied by publisher]

Progression and survival results after radical hepatic metastasectomy of indolent advanced neuroendocrine neoplasms (NENs) supports an aggressive surgical approach.

Surgery. 2010 Jul 30;

Authors: Saxena A, Chua TC, Sarkar A, Chu F, Liauw W, Zhao J, Morris DL

BACKGROUND: Neuroendocrine neoplasms most commonly metastasize to the liver. Operative extirpation of neuroendocrine neoplasm hepatic metastases improves symptoms and seems to improve survival, but subsequent evidence is required. The current study evaluates the progression-free survival and overall survival of patients after resection (with or without ablation) of neuroendocrine neoplasm hepatic metastases. As a secondary endpoint, the prognostic factors associated with progression-free survival and overall survival were evaluated. METHODS: Seventy-four patients with neuroendocrine neoplasm hepatic metastases underwent hepatic resection between December 1992 and December 2009. Thirty-eight patients underwent synchronous cryoablation. Patients were assessed radiologically and serologically at monthly intervals for the first 3 months and then at 6-month intervals after treatment. Progression-free survival and overall survival were determined; clinicopathologic and treatment-related factors associated with progression-free survival and overall survival were evaluated through univariate and multivariate analyses. RESULTS: No patient was lost to follow-up. The median follow-up for the patients who were alive was 41 months (range, 1-162). The median progression-free survival and overall survival after hepatic resection were 23 and 95 months, respectively. Five- and 10-year overall survival were 63% and 40%, respectively. Two independent factors were associated with overall survival: histologic grade (P < .001) and extrahepatic disease (P = .021). The only independent predictor for progression-free survival was pathologic margin status (P = .023). CONCLUSION: In selected patients, aggressive operative extirpation of neuroendocrine neoplasm hepatic metastases is effective in achieving long-term survival. Disease progression, however, is a common occurrence; therefore, a multimodality treatment approach for progressive disease is necessary. Integrating the knowledge of identified prognostic factors can both improve patient selection and identify patients at greatest risk of treatment failure.

PMID: 20674950 [PubMed - as supplied by publisher]

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Optimal duration of prophylactic antibiotic administration for elective colon cancer surgery: A randomized, clinical trial.

Surgery. 2010 Jul 22;

Authors: Suzuki T, Sadahiro S, Maeda Y, Tanaka A, Okada K, Kamijo A

BACKGROUND: Procedures for perioperative infection prophylaxis in elective colon cancer surgery consist of preoperative mechanical preparation, chemical preparation with oral antibiotic administration, perioperative intravenous antibiotic administration, and others. However, the optimal combination of these procedures and drugs and their durations of administration have not yet been established. A randomized study was conducted to determine the optimal duration of perioperative antibiotic administration with use of mechanical and chemical preparation. METHODS: A total of 370 patients who were to undergo elective colon cancer surgery were randomized into 2 groups. After mechanical and chemical preparations, a single, 1-g dose of flomoxef was administered immediately before surgery to patients in group A. Flomoxef 1 g was administered twice daily for a total of 4 days from the day of surgery to postoperative day 3 to patients in group B. RESULTS: Comparison was performed between 179 patients in group A and 181 patients in group B with analyzable data. The incidences of incisional surgical site infections (SSIs), organ/space SSIs, and remote infections (RIs) were 15 patients (8.4%), 1 patient (0.6%), and 8 patients (4.5%), respectively, in group A, and 13 patients (7.2%), 2 patients (1.1%), and 6 patients (3.3%), respectively, in group B. There were no differences in the incidence of incisional SSIs, organ/space SSIs, or RIs between groups A and B. CONCLUSION: It was shown that a single dose of intravenous antibiotic immediately before surgery is sufficient as perioperative infection prophylaxis in elective colon cancer surgery when mechanical and chemical preparation is performed.

PMID: 20655559 [PubMed - as supplied by publisher]

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Disseminated intravascular coagulation at an early phase of trauma is associated with consumption coagulopathy and excessive fibrinolysis both by plasmin and neutrophil elastase.

Surgery. 2010 Jul 22;

Authors: Hayakawa M, Sawamura A, Gando S, Kubota N, Uegaki S, Shimojima H, Sugano M, Ieko M

BACKGROUND: The aims of the present study were to confirm the consumption coagulopathy of disseminated intravascular coagulation with the fibrinolytic phenotype at an early phase of trauma and to test the hypothesis that thrombin-activatable fibrinolysis inhibitor, neutrophil elastase, and plasmin contribute to the increased fibrinolysis of this type of disseminated intravascular coagulation. Furthermore, we hypothesized that disseminated intravascular coagulation at an early phase of trauma progresses dependently to disseminated intravascular coagulation with a thorombotic phenotype from 3 to 5 days after injury. METHODS: Fifty-seven trauma patients, including 30 patients with disseminated intravascular coagulation and 27 patients without disseminated intravascular coagulation, were studied prospectively. Levels of thrombin-activatable fibrinolysis inhibitor, tissue-type plasminogen activator plasminogen activator inhibitor-1 complex, plasmin alpha2 plasmin inhibitor complex, D-dimer, neutrophil elastase, and fibrin degradation product by neutrophil elastase were measured on days 1, 3, and 5 after trauma. The prothrombin time, fibrinogen, fibrin/fibrinogen degradation product, antithrombin, and lactate also were measured. RESULTS: Independent of the lactate levels, disseminated intravascular coagulation patients showed a prolonged prothrombin time, lesser fibrinogen and antithrombin levels, and increased levels of fibrin/fibrinogen degradation product on day 1. Disseminated intravascular coagulation diagnosed on day 1 continued to late-phase disseminated intravascular coagulation on days 3 and 5 after trauma. Increased levels of tissue-type plasminogen activator plasminogen activator inhibitor-1 complex, plasmin alpha2 plasmin inhibitor complex, D-dimer, neutrophil elastase, and fibrin degradation product by neutrophil elastase but not thrombin-activatable fibrinolysis inhibitor were observed in the disseminated intravascular coagulation patients. No correlation was observed between plasmin alpha2 plasmin inhibitor complex and fibrin degradation product by neutrophil elastase in disseminated intravascular coagulation patients. Multiple regression analysis showed the disseminated intravascular coagulation score and the tissue-type plasminogen activator plasminogen activator inhibitor-1 complex levels on day 1 to correlate with the total volume of transfused blood. Patient prognosis deteriorated in accordance with the increasing disseminated intravascular coagulation severity. CONCLUSION: Disseminated intravascular coagulation at an early phase of trauma is associated with consumption coagulopathy and excessive fibrinolysis both by plasmin and neutrophil elastase independent of hypoperfusion and continues to disseminated intravascular coagulation at a late phase of trauma. Increased fibrinolysis requires more blood transfusions, contributing to a poor patient outcome.

PMID: 20655560 [PubMed - as supplied by publisher]

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Improving surgery intern confidence through the implementation of expanded orientation sessions.

Surgery. 2010 Aug;148(2):181-186

Authors: Antonoff MB, Swanson JA, Acton RD, Chipman JG, Maddaus MA, Schmitz CC, D’Cunha J

BACKGROUND: New surgical interns may be unprepared for job-related tasks and harbor anxiety that could interfere with job performance. To address these problems, we extended our intern orientation with the principal aim of demonstrating the need for expanded instruction on execution of daily tasks. Additionally, we sought to show that an enriched orientation curriculum durably augments intern confidence. METHODS: Twenty-one surgical interns participated in an extended orientation program, consisting of interactive didactics, case scenario presentations, and small group discussions. Evaluations collected at completion of orientation and 1-month follow-up assessed self-reported confidence levels on job-related tasks before, immediately afterward, and 1-month after orientation. Statistical analyses were performed using Student t tests (P < .05 significant). RESULTS: Self-reports of confidence on job-related tasks before the orientation sessions were low; however, program participation resulted in immediate confidence increases in all areas. Evaluations at 1-month follow-up showed persistence of these gains. CONCLUSION: Interns reported considerable anxiety in all job-related tasks before orientation. After the sessions, confidence levels were significantly and durably improved in all areas. Our findings suggest the need for specific instruction on job-related tasks of surgical internship and demonstrate the effectiveness of an expanded orientation in improving intern confidence in execution of these tasks.

PMID: 20627274 [PubMed - as supplied by publisher]

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Functional polymorphisms of cyclooxygenase-2 (COX-2) gene and risk for urinary bladder cancer in North India.

Surgery. 2010 Jun 1;

Authors: Gangwar R, Mandhani A, Mittal RD

BACKGROUND: Cyclooxygenase-2 (COX-2) is an enzyme involved in the synthesis of prostaglandins and thromboxanes, which are regulators of processes that are relevant to cancer development. It is involved in carcinogenesis, immune response suppression, apoptosis inhibition, angiogenesis, and tumor cell invasion and metastasis. The gene for COX-2, designated as prostaglandin-endoperoxide synthase 2 (PTGS-2), carries polymorphisms, such as -765G>C, 1195G>A in the promoter region, and 8473T>C in the 3′-untranslated region (UTR), which have been associated with susceptibility to malignant disease. METHODS: We undertook a case-control study of 212 urothelial bladder cancer (UBC) cases and 250 controls to investigate the association between COX-2 polymorphism and bladder cancer susceptibility, using the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) method and also investigated gene-environment interactions. RESULTS: Cox-2 765G>C, a variant(C) allele carrier, was at an increased risk of UBC (odds ratio [OR] = 1.90; P = .004); however, -1195G>A; -1290A>G; and 3′UTR 8473T>C polymorphisms of COX-2 gene were not significantly associated with UBC. 765G>C also was associated with the invasive stage of a bladder tumor (OR = 2.73; P = .033). High risk for UBC also was observed with respect to COX-2 haplotypes C-765T8473A-1195A-1290 (OR = 3.47; P = .014). In case-only analysis, COX-2 765 variant allele carrier genotypes also showed an increased risk among former and current smokers (OR = 3.06; P = .041 and OR = 4.39; P = .032, respectively). CONCLUSION: COX-2 -765G>C polymorphism confers UBC susceptibility particularly in smokers and in patients with invasive tumors. 765C allele carrier genotypes also are influenced with a high risk of recurrence in Bacillus Calmette-Guérin-treated patients. Collectively, these findings confirm that the COX-2 -765G>C polymorphism is a risk factor for the development of bladder cancer and can provide a plausible mechanistic explanation. Further validation in large population-based studies is needed.

PMID: 20627335 [PubMed - as supplied by publisher]

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Superior myocardial preservation with HTK solution over Celsior in rat hearts with prolonged cold ischemia.

Surgery. 2010 Aug;148(2):463-473

Authors: Lee S, Huang CS, Kawamura T, Shigemura N, Stolz DB, Billiar TR, Luketich JD, Nakao A, Toyoda Y

BACKGROUND: Increasing allograft ischemic time is a significant risk factor for mortality following heart transplantation (HTx). The purpose of this study was to evaluate the protective effects of histidine-tryptophan-ketoglutarate (HTK) and Celsior (CEL) using a rat HTx model with prolonged cold storage. METHODS: The hearts were excised from donor rats, stored in cold preservation solution for either 6 or 18 hours, and heterotopically transplanted into syngeneic recipients. Serum creatine phosphokinase (CPK), serum troponin I, graft-infiltrating cells, graft mRNA levels for inflammatory mediators, and tissue adenosine triphosphate (ATP) levels were analyzed, as markers of graft injury. RESULTS: The recipients of grafts stored in HTK for 18 hours of prolonged cold ischemia had lower levels of serum CPK and tissue malondialdehyde, less upregulation of the mRNAs for IL-6 and inducible nitric oxide synthase, less apoptosis, and higher ATP levels than those receiving grafts stored in CEL and Saline. Cardiac contraction 3 hours after reperfusion was observed in 43% of the cardiac grafts stored in HTK for 18 hours, while no cardiac wall movement was seen in grafts stored in either saline or CEL. CONCLUSION: Cold storage in HTK exhibited superior protective effects against prolonged cold ischemia in a syngeneic rat transplantation model.

PMID: 20627336 [PubMed - as supplied by publisher]

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Feasibility of laparoscopic gastrectomy with radical lymph node dissection for gastric cancer: From a viewpoint of pancreas-related complications.

Surgery. 2010 Jun 1;

Authors: Obama K, Okabe H, Hosogi H, Tanaka E, Itami A, Sakai Y

BACKGROUND: There is little evidence for the technical feasibility of laparoscopic gastrectomy (LG) with peripancreatic lymphadenectomy in terms of postoperative complications. To evaluate the technical feasibility of LG with radical lymphadenectomy, we focused on pancreas-related complications in LG and open gastrectomy (OG), and then investigated whether such complications increased in LG. METHODS: We reviewed the surgical outcomes of 138 consecutive patients with gastric cancer who underwent LG with peripancreatic lymphadenectomy in our hospital between July 2005 and February 2009. As a control group, we used 95 consecutive OG cases with peripancreatic lymphadenectomy without splenectomy or para-aortic lymphadenectomy. LG and OG were compared for clinicopathologic characteristics, operative outcomes, postoperative morbidities and mortalities, and amylase concentration of drainage fluid (d-AMY). RESULTS: The overall operative morbidity rates were 15% in the LG and 20% in the OG group. Rates of postoperative pancreatic fistula (POPF), Grade B and C in the International Study Group on Pancreatic Fistula definition, were 7% in the LG group and 2% in the OG group, indicating no statistical difference (P = .149). There were no in-hospital deaths. The median value of d-AMY in LG was 934.5 IU/L, while that in OG was 349 IU/L; d-AMY after LG was significantly higher than that after OG (P < .01). CONCLUSION: Considering low morbidity and mortality rates, LG with peripancreatic lymphadenectomy is technically feasible. Although POPF after LG was infrequent, d-AMY level was higher than after OG. We should pay attention to the potential risk of pancreatic leakage when carrying out LG with peripancreatic lymphadenectomy.

PMID: 20627337 [PubMed - as supplied by publisher]

The first (and second) craniofacial operation at the Johns Hopkins Hospital: The case of the flying rib!

Surgery. 2010 Jul 9;

Authors: Sarr MG

PMID: 20621321 [PubMed - as supplied by publisher]

Propranolol decreases cardiac work in a dose-dependent manner in severely burned children.

Surgery. 2010 Jun 30;

Authors: Williams FN, Herndon DN, Kulp GA, Jeschke MG

BACKGROUND: Severe burn is followed by profound cardiac stress. Propranolol, a nonselective beta(1,) beta(2)-receptor antagonist, decreases cardiac stress, but little is known about the dose necessary to cause optimal effect. Thus, the aim of this study was to determine in a large, prospective, randomized, controlled trial the dose of propranolol that would decrease heart rate >/=15% of admission heart rate and improve cardiac function. Four-hundred six patients with burns >30% total body surface area were enrolled and randomized to receive standard care (controls; n = 235) or standard care plus propranolol (n = 171). METHODS: Dose-response and drug kinetics of propranolol were performed. Heart rate and mean arterial pressure (MAP) were measured continuously. Cardiac output (CO), cardiac index, stroke volume, rate-pressure product, and cardiac work (CW) were determined at regular intervals. Statistical analysis was performed using analysis of variance with Tukey and Bonferroni corrections and the Student t test when applicable. Significance was accepted at P < .05. RESULTS: Propranolol given initially at 1 mg/kg per day decreased heart rate by 15% compared with control patients, but was increased to 4 mg/kg per day within the first 10 days to sustain treatment benefits (P < .05). Propranolol decreased CO, rate-pressure product, and CW without deleterious effects on MAP. The effective plasma drug concentrations were achieved in 30 minutes, and the half-life was 4 hours. CONCLUSION: The data suggest that propranolol is an efficacious modulator of the postburn cardiac response when given at a dose of 4 mg/kg per day, and decreases and sustains heart rate 15% below admission heart rate.

PMID: 20598332 [PubMed - as supplied by publisher]

Chemokine receptor CXCR4 overexpression predicts recurrence for hormone receptor-positive, node-negative breast cancer patients.

Surgery. 2010 Jun 30;

Authors: Chu QD, Holm NT, Madumere P, Johnson LW, Abreo F, Li BD

BACKGROUND: The expected outcome for hormone receptor-positive, node-negative patients should be favorable. However, some patients do develop metastatic disease and the mechanism for this observation is poorly understood. CXCR4 is a chemokine receptor that has been implicated to play a pivotal role in breast cancer growth and metastasis. Its predictive role has not been fully evaluated. We determined to see whether CXCR4 can predict outcome in this subset of patients. METHODS: We accrued and analyzed data from 101 patients with hormone receptor-positive, node-negative breast cancers. The CXCR4 level was detected using Western blots and its level was defined as either low (<6.6-fold) or high (>/=6.6-fold). Primary end points were systemic cancer recurrence and death. Statistical analysis performed included Spearman’s correlation, Kaplan-Meier survival analysis, and Cox proportional hazard model. RESULTS: Although benign breast tissues had an undetectable level of CXCR4, all 101 cancer specimens had overexpressed CXCR4 (mean 6.4 +/- 3.4-fold). There were 79 patients in the low CXCR4 group and 22 patients in the high CXCR4 group. High CXCR4 overexpression was predictive of both cancer recurrence (P = .002) and overall survival (P = .0012). CONCLUSION: High CXCR4 overexpression in primary tumors was predictive of worse outcomes in hormone receptor-positive, node-negative breast cancer patients.

PMID: 20598333 [PubMed - as supplied by publisher]

Induction of monocyte chemoattractant protein-1 by nicotine in pancreatic ductal adenocarcinoma cells: Role of osteopontin.

Surgery. 2010 Jun 23;

Authors: Lazar M, Sullivan J, Chipitsyna G, Aziz T, Salem AF, Gong Q, Witkiewicz A, Denhardt DT, Yeo CJ, Arafat HA

BACKGROUND: Cigarette smoke and nicotine are among the leading environmental risk factors for developing pancreatic ductal adenocarcinoma (PDA). We showed recently that nicotine induces osteopontin (OPN), a protein that plays critical roles in inflammation and tumor metastasis. We identified an OPN isoform, OPNc, that is selectively inducible by nicotine and highly expressed in PDA tissue from smokers. In this study, we explored the potential proinflammatory role of nicotine in PDA through studying its effect on the expression of monocyte chemoattractant protein (MCP)-1 and evaluated the role of OPN in mediating these effects. METHODS: MCP-1 mRNA and protein in PDA cells treated with or without nicotine (3-300 nmol/L) or OPN (0.15-15 nmol/L) were analyzed by real-time polymerase chain reaction and enzyme-linked immunosorbent assay. Luciferase-labeled promoter studies evaluated the effects of nicotine and OPN on MCP-1 transcription. Intracellular and tissue colocalization of OPN and MCP-1 were examined by immunofluorescence and immunohistochemistry. RESULTS: Nicotine treatment significantly increased MCP-1 expression in PDA cells. Interestingly, blocking OPN with siRNA or OPN antibody abolished these effects. Transient transfection of the OPNc gene in PDA cells or their treatment with recombinant OPN protein significantly (P < .05) increased MCP-1 mRNA and protein and induced its promoter activity. MCP-1 was found in 60% of invasive PDA lesions, of whom 66% were smokers. MCP-1 colocalized with OPN in PDA cells and in the malignant ducts, and correlated well with higher expression levels of OPN in the tissue from patients with invasive PDA. CONCLUSION: Our data suggest that cigarette smoking and nicotine may contribute to PDA inflammation by inducing MCP-1 and provide a novel insight into a unique role for OPN in mediating these effects.

PMID: 20579680 [PubMed - as supplied by publisher]

Age-stratified outcomes in elderly patients undergoing open and endovascular procedures for aortoiliac occlusive disease.

Surgery. 2010 Jun 24;

Authors: Indes JE, Tuggle CT, Mandawat A, Sosa JA

BACKGROUND: The elderly comprise a sizeable segment of patients with aortoiliac occlusive disease (AIOD). We analyzed outcomes in elderly patients who underwent open and endovascular procedures for AIOD. METHODS: Elderly patients with AIOD who underwent open and endovascular procedures in the Healthcare Cost and Utilization Project Nationwide Inpatient Sample (HCUP-NIS) database from 2004 to 2007 were identified. Patients were stratified into age groups: 65-69 years, 70-79 years, and 80 years or older. The clinical outcomes were complications and mortality; the economic outcomes were duration of stay and hospital cost. Both open and endovascular procedures were compared using chi(2) analysis, analysis of variance (ANOVA), and multivariate linear and logistic regression. RESULTS: Patients aged 80 years or older were more likely be nonelective admissions (43%), have a high Charlson Comorbidity Index (12%), and have iliac artery disease (63%, all P < .05). Patients aged 80 years or older who underwent open procedures had higher complication and mortality rates compared with younger patients (both P < .05). Endovascular procedures had a lower complication rate, duration of stay, and hospital cost for all age groups (P < .05). Mortality was significantly lower for endovascular treatment in patients aged 70 years or older (P < .05). A multivariate analysis showed patients aged 70 years or older were at increased risk of complications (P < .05). CONCLUSION: For both procedures, clinical outcomes worsen as patient age increases. In patients aged 70 years or older, endovascular treatment conferred a lower complication rate than open repair.

PMID: 20580044 [PubMed - as supplied by publisher]

Is breast conservation therapy a viable option for patients with triple-receptor negative breast cancer?

Surgery. 2010 Jun 24;

Authors: Parker CC, Ampil F, Burton G, Li BD, Chu QD

BACKGROUND: Triple-receptor negative breast cancers (TNBC) are aggressive neoplasms that lack estrogen-receptor, progesterone-receptor, and HER-2 expressions. Comparative analysis of breast conservation therapy (BCT) versus mastectomy for TNBC is reported sparsely. We hypothesized that, despite its aggressive behavior, TNBC can be managed with BCT. METHODS: Outcomes for 202 patients with TNBC who were treated with BCT or mastectomy were analyzed. Primary endpoints were cancer recurrence and death. Statistical analysis performed included Kaplan-Meier survival analysis, log-rank, independent samples t test, Cox proportional hazard model, and Chi-square. RESULTS: BCT was performed in 30% of patients. Isolated local recurrence rate for BCT and mastectomy was 0% and 10.6%, respectively (P = .02). Isolated regional recurrence rate for BCT and mastectomy was 1.6% and 1.4%, respectively (P = .61). Neither concomitant locoregional and distant recurrence rate (P = .73) nor isolated distant recurrence rate (P = .71) was significantly different between the BCT and mastectomy groups. The 5-year overall survival (OS) was better for the BCT group than the mastectomy group (89% vs 69%; P = .018); however, this was likely due to the mastectomy group having a larger neoplasm size (T3/T4: 4% BCT vs 27% mastectomy; P = .0002), advanced N-disease (N2/3: 8% BCT vs 25% mastectomy; P = .0003), and advanced stage of disease (Stage 3: 8% BCT vs 35% mastectomy; P < .0001). On multivariate analysis, surgical approach had no effect on either disease-free survival (P = .60) or OS (P = .19); only t-stage was an independent predictor of disease-free survival (P = .02), while N-stage was an independent predictor for OS (P = .03). CONCLUSION: Despite TNBC’s aggressive behavior, breast conservation therapy is a viable option for selected patients with TNBC.

PMID: 20580045 [PubMed - as supplied by publisher]

Two-year skill retention and certification exam performance after fundamentals of laparoscopic skills training and proficiency maintenance.

Surgery. 2010 Jun 24;

Authors: Mashaud LB, Castellvi AO, Hollett LA, Hogg DC, Tesfay ST, Scott DJ

BACKGROUND: The purpose of this study was to determine 2-year performance retention and certification exam pass rate after completion of a proficiency-based fundamental laparoscopic skills (FLS) curriculum and subsequent interval training. METHODS: Surgery residents (postgraduate year [PGY]1-5, n = 91) were enrolled in an Institutional Review Board approved protocol. All participants initially underwent proficiency-based training on all 5 FLS tasks. Subsequently, available residents were enrolled every 6 months in an ongoing training curriculum that included retention tests on tasks 4 and 5, with mandatory retraining to proficiency if the proficiency levels were not achieved. The final retention test included the actual FLS certification examination for PGY4-5 trainees. RESULTS: A 96% participation rate was achieved for all curricular components during the 2-year study period (PGY3-5, n = 33). Skill retention at retention 1-4 was 83%, 94%, 98%, and 91% for task 4 and 85%, 95%, 96%, and 100% for task 5, respectively. All PGY4-5 (n = 20) residents passed the FLS certification examination, achieving 413 +/- 28 total score on the skills portion (passing score >/= 270) and demonstrating 92% retention for all 5 tasks. CONCLUSION: Proficiency-based training with subsequent ongoing practice results in a very high level of skill retention after 2 years and uniformly allows trainees to pass the FLS certification examination.

PMID: 20580046 [PubMed - as supplied by publisher]

Dopamine and cAMP regulated phosphoprotein MW 32 kDa is overexpressed in early stages of gastric tumorigenesis.

Surgery. 2010 Jun 24;

Authors: Mukherjee K, Peng D, Brifkani Z, Belkhiri A, Pera M, Koyama T, Koehler EA, Revetta FL, Washington MK, El-Rifai W

BACKGROUND: Gastric adenocarcinoma is a leading cause of cancer mortality. The role of dopamine and cAMP regulated phosphoprotein MW 32 kDa (DARPP-32) overexpression in the gastric tumorigenesis cascade remains unclear. METHODS: The expression of DARPP-32 in the multistep carcinogenesis cascade was examined using immunohistochemistry analysis on 533 samples. The contribution of DARPP-32 in cellular transformation and molecular signaling was investigated using NIH3T3, AGS, and SNU16 cells. RESULTS: The composite expression score (CES), calculated from immunostaining patterns, increased significantly from normal or gastritis to metaplasia, dysplasia, and adenocarcinoma (P < .001). In patients with normal stomach or gastritis and tumor samples, a 76% and 77% chance, respectively, was found (P < 0.001) that CES was higher in the tumor. High median CES correlated with well- or moderately differentiated (P = .03) gastric adenocarcinomas. NIH3T3 cells transfected with DARPP-32 demonstrated increased levels of phospho-AKT and a 5-fold increase in the number of foci as compared with the control (P = .02). DARPP-32 expression in AGS cells led to increased protein levels of phospho-AKT and BCL-2. For validation, the knockdown of endogenous DARPP-32 expression in SNU16 cells using shRNA resulted in decreased levels of phospho-AKT phosphorylation and BCL-2. CONCLUSION: Our results suggest that DARPP-32 overexpression may participate in the transition to intestinal metaplasia and in the progression to neoplasia. The ability of DARPP-32 to transform NIH3T3 cells and to regulate AKT and BCL-2 underscores its possible oncogenic potential.

PMID: 20580047 [PubMed - as supplied by publisher]

Physician attitudes regarding advance directives for high-risk surgical patients: A qualitative analysis.

Surgery. 2010 Jun 24;

Authors: Bradley CT, Brasel KJ, Schwarze ML

BACKGROUND: Advance directive (AD) use is uncommon in surgical patients, yet the exact reasons for this are unknown. Our aim was to identify and describe beliefs held by surgeons regarding ADs. A qualitative exploration of physicians’ opinions of ADs for surgical patients was designed. This methodology is preferred to quantitative techniques, which are subject to bias when an issue’s underlying themes are unknown. METHODS: A purposive sample of physicians, primarily surgeons performing high-risk operations, was interviewed using a semi-structured questionnaire. Representation from several subspecialties established maximum transferability. Data collection continued until theoretical saturation was achieved. Transcribed audiotapes were first coded independently and then collaboratively using a coding scheme developed through grounded theory and deductive approaches. Modeling identified themes and trends to ensure faithful data representation. RESULTS: Three significant themes emerged, illustrating the conflicting attitudes surgeons harbor with respect to ADs. Surgeons described a general benefit of ADs in providing a framework for discussion (“It [AD] is a useful framework to begin discussion in the end of life issues for the patient.”), but they also exhibited frustration with the disconnect between reality and written ADs (“What they [patients] really mean and what the words say are totally different.”) and felt conflicted between the battle for surgical cure and the treatment limitations that occur with ADs in practice (“[ADs] may tie a surgeon’s hands that might influence my judgment in performing the operation.”). CONCLUSION: Surgeons describe conflicting feelings about ADs for high-risk surgical patients. These beliefs and attitudes may be an underlying factor for the limited use of ADs by surgical patients. Methods for improving effective use of ADs in surgical practice must address these attitudes.

PMID: 20580048 [PubMed - as supplied by publisher]

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Hyperglycemia modulates plasminogen activator inhibitor-1 expression and aortic diameter in experimental aortic aneurysm disease.

Surgery. 2010 Jun 18;

Authors: Dua MM, Miyama N, Azuma J, Schultz GM, Sho M, Morser J, Dalman RL

BACKGROUND: Extracellular matrix degradation is a sentinel pathologic feature of abdominal aortic aneurysm (AAA) disease. Diabetes mellitus, a negative risk factor for AAA, may impair aneurysm progression through its influence on the fibrinolytic system. We hypothesize that hyperglycemia limits AAA progression through effects on endogenous plasminogen activator inhibitor-1 (PAI-1) levels and subsequent reductions in plasmin generation. METHODS: Experimental AAAs were induced in diabetic and control mice via the intra-aortic elastase infusion method. Serial transabdominal high-frequency ultrasound examinations were performed to monitor aortic diameter following elastase infusion. Circulating PAI-1 and plasmin alpha2-antiplasmin (PAP) complex concentrations were determined by ELISA and local expression of PAI-1 levels was examined by RT-PCR and immunohistochemistry. RESULTS: Hyperglycemia was associated with reduced AAA diameter, increased plasma PAI-1 concentration and reduced plasmin generation. Aneurysmal aortic PAI-1 gene expression increased in parallel with plasma concentration, with peak expression occurring early after aneurysm initiation. CONCLUSION: Hyperglycemia increases PAI-1 expression and attenuates AAA diameter in experimental AAA disease. These results emphasize the role of the fibrinolytic pathway in AAA pathophysiology, and suggest a candidate mechanism for hyperglycemic inhibition of AAA disease.

PMID: 20561659 [PubMed - as supplied by publisher]

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Increased stress levels may explain the incomplete transfer of simulator-acquired skill to the operating room.

Surgery. 2010 May;147(5):640-5

Authors: Prabhu A, Smith W, Yurko Y, Acker C, Stefanidis D

BACKGROUND: Proficiency-based simulator training in laparoscopic suturing leads to improved operative performance, but the skill transfer is incomplete. The objective of this study was to examine the stress level of trainees during the transition from the simulator to the operating room (OR) and its impact on performance. METHODS: Novices (n = 20) were randomized into training and control groups. After the training group achieved proficiency in laparoscopic suturing, both groups were tested on a live porcine, laparoscopic Nissen fundoplication model. Participant performance was assessed using an objective score. Stress level was evaluated by recording beat-to-beat heart rate (BBHR) and short-term heart rate variability (STHRV) at baseline, after achieving proficiency (only the training group) and in the OR. Repeated measurement analysis of variance (ANOVA) and t test were used for analysis. RESULTS: Baseline simulator performance and data for heart rate variability were similar for both groups. After achieving simulator proficiency, the trained group demonstrated the anticipated decrease in performance (mean average + or – SEM) in the OR (524 + or – 17 vs 290 + or – 95; P < .001), and an increase in BBHR (98 + or – 14 vs115 + or – 18; P < .001) but not STHRV (4.1 + or – 0.8 vs 3.7 + or – 0.9; P = .5). A similar but lesser increase of the BBHR was observed in the control group compared to the study group. CONCLUSION: BBHR was a more sensitive measure of stress level compared with STHRV. The increased BBHR observed in the OR that reflects stress and performance anxiety may explain the incomplete transfer of simulator-acquired skill in novice learners.

PMID: 20403516 [PubMed - indexed for MEDLINE]

Colon ischemia: Respice, adspice, prospice.

Surgery. 2010 Apr 17;

Authors: Brandt LJ

PMID: 20403627 [PubMed - as supplied by publisher]

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Hemostatic efficacy of TachoSil in liver resection compared with argon beam coagulator treatment: An open, randomized, prospective, multicenter, parallel-group trial.

Surgery. 2010 Apr 10;

Authors: Fischer L, Seiler CM, Broelsch CE, de Hemptinne B, Klempnauer J, Mischinger HJ, Gassel HJ, Rokkjaer M, Schauer R, Larsen PN, Tetens V, Büchler MW

BACKGROUND: The aim of this trial was to confirm previous results demonstrating the efficacy and safety of a fixed combination tissue sealant versus argon beam coagulation (ABC) treatment in liver resection. METHODS: This trial was designed as an international, multicenter, randomized, controlled surgical trial with 2 parallel groups. Patients were eligible for intra-operative randomization after elective resection of >/=1 liver segment and primary hemostasis. The primary end point was the time to hemostasis after starting the randomized intervention to obtain secondary hemostasis. Secondary end points were drainage duration, volume, and content. Adverse events were collected to evaluate the safety of treatments. The trial was registered internationally (Eudract number 2008-006407-23). RESULTS: Among 119 patients (60 TachoSil and 59 ABC) randomized in 10 tertiary care centers in Europe, the mean time to hemostasis was less when TachoSil was used (3.6 minutes) compared with ABC (5.0 minutes; P = .0018). The estimated ratio of mean time to hemostasis for TachoSil/ABC was 0.61 (95% confidence interval, 0.47-0.80; P = .0003). Postoperative drainage volume, drainage fluid, and drainage duration did not differ between the 2 groups. Mortality (2 vs 4 patients) and adverse reactions (24 vs 28 patients) for TachoSil versus ABC did not differ. CONCLUSION: This trial confirmed that TachoSil achieved significantly faster hemostasis after liver resection compared with ABC. Postoperative morbidity and mortality remained unchanged between both groups.

PMID: 20385397 [PubMed - as supplied by publisher]

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Hemostatic efficacy of TachoSil in liver resection compared with argon beam coagulator treatment: An open, randomized, prospective, multicenter, parallel-group trial.

Surgery. 2010 Apr 10;

Authors: Fischer L, Seiler CM, Broelsch CE, de Hemptinne B, Klempnauer J, Mischinger HJ, Gassel HJ, Rokkjaer M, Schauer R, Larsen PN, Tetens V, Büchler MW

BACKGROUND: The aim of this trial was to confirm previous results demonstrating the efficacy and safety of a fixed combination tissue sealant versus argon beam coagulation (ABC) treatment in liver resection. METHODS: This trial was designed as an international, multicenter, randomized, controlled surgical trial with 2 parallel groups. Patients were eligible for intra-operative randomization after elective resection of >/=1 liver segment and primary hemostasis. The primary end point was the time to hemostasis after starting the randomized intervention to obtain secondary hemostasis. Secondary end points were drainage duration, volume, and content. Adverse events were collected to evaluate the safety of treatments. The trial was registered internationally (Eudract number 2008-006407-23). RESULTS: Among 119 patients (60 TachoSil and 59 ABC) randomized in 10 tertiary care centers in Europe, the mean time to hemostasis was less when TachoSil was used (3.6 minutes) compared with ABC (5.0 minutes; P = .0018). The estimated ratio of mean time to hemostasis for TachoSil/ABC was 0.61 (95% confidence interval, 0.47-0.80; P = .0003). Postoperative drainage volume, drainage fluid, and drainage duration did not differ between the 2 groups. Mortality (2 vs 4 patients) and adverse reactions (24 vs 28 patients) for TachoSil versus ABC did not differ. CONCLUSION: This trial confirmed that TachoSil achieved significantly faster hemostasis after liver resection compared with ABC. Postoperative morbidity and mortality remained unchanged between both groups.

PMID: 20385397 [PubMed - as supplied by publisher]

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The effect of dressing with fresh kiwifruit on burn wound healing.

Surgery. 2010 Apr 7;

Authors: Mohajeri G, Masoudpour H, Heidarpour M, Khademi EF, Ghafghazi S, Adibi S, Akbari M

BACKGROUND: This study was designed to evaluate the wound healing effects of kiwifruit in the treatment of second-degree burn wounds in rats. METHODS: Sixty rats were each randomly assigned to 1 of 3 groups. A deep second-degree burn was created on the lateral flank of each rat with a standard burning procedure in the form of applying a heated plaque. In the control group (group C; n = 20) burns were dressed with Vaseline sterile gauze after normal saline irrigation. In group S (n = 20), the lesions were treated with silver sulfadiazine cream after normal saline irrigation. In the third group (group K; n = 20), the burn wounds were dressed with kiwifruit. The dressings were changes twice a day in all groups. The response to treatments was assessed histologically at day 21 postburn and microbiologically on days 7 and 21. Macroscopic evaluation was performed every day to determine wound closure rate, measure burn wound area, and investigate macroscopic edema, hyperemia, and epithelialization. Histopathologic evaluation included monitoring of epithelialization, vascularization, granulation tissue formation, and inflammatory cell response. RESULTS: On day 21, the wounds in the group K healed completely in comparison to other groups (P < .0001). There was significant reduction in wound area size in the group K in all evaluation days as compared with groups S and C (P < .0001). Microscopic evaluation revealed a high grade of neovascularization in group K lesions in contrast with groups S and C (P < .0001). Wound infection was dramatically less common in the group K compared with the other 2 groups (P < .05). CONCLUSION: We suggest that the dramatic antibacterial, debridement, wound contracture, and angiogenic effect of kiwifruit induced a significant wound healing in burn ulcers and might be useful in treating chronic ulcers, such as bedsores.

PMID: 20381106 [PubMed - as supplied by publisher]

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Comparable results with 3-year follow-up for large-pore versus small-pore meshes in open incisional hernia repair.

Surgery. 2010 Apr 7;

Authors: Berrevoet F, Maes L, De Baerdemaeker L, Rogiers X, Troisi R, de Hemptinne B

BACKGROUND: Decreasing the amount of polypropylene by increasing pore size produces a lighter weight mesh that may improve tissue ingrowth and, functional properties of the abdominal wall and diminish mesh-related complications. It was the aim of this prospective observational cohort study to analyze the outcome of incisional hernia repair using small-pore versus large-pore meshes and using a standardized, open, retromuscular surgical technique. METHODS: Across a 6-year period we analyzed 205 patients treated with a heavyweight mesh (group I) and 235 patients treated with a large-pore mesh (group II) for incisional hernias. Patients with a body mass index greater than 40 kg/m(2) and patients with hernias with a transverse diameter of more than 10 cm were not treated by a retromuscular mesh repair and are not included in this analysis. Recurrent incisional hernias also were not included. Both groups had 3 years of follow-up. Patients were evaluated for pain, discomfort, feeling of foreign material, and recurrences. RESULTS: Pre-operative characteristics were comparable between the groups, including body mass index, diabetes, and smoking. The mean total hernia surface was 56 cm(2) for group I versus 48 cm(2) in group II. The mesh surface area was 448 cm(2) for group I and 425 cm(2) for group II. Considering pain scores, there was only a minor difference between the 2 groups at 1-month follow-up, at which time, the Visual Analogue Scale was 5.8 in group I and 4.9 in group II (P = .16). All other scores were comparable between the groups. In group I, 7 recurrences (3.4%) were recorded after 3 years, of which 6 were already apparent 1 year after initial repair. In group II, 9 recurrences (3.8%) were diagnosed, again 6 within the first year after repair. CONCLUSION: Large-pore meshes can be used safely for open primary incisional hernia repair with an equal outcome compared with small-pore meshes in nonobese patients with defects smaller than 10 cm in width, in regard to both recurrence rates and chronic discomfort.

PMID: 20381107 [PubMed - as supplied by publisher]

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Missed opportunities for primary repair in complicated acute diverticulitis.

Surgery. 2010 Apr 6;

Authors: Tabbara M, Velmahos GC, Butt MU, Chang Y, Spaniolas K, Demoya M, King DR, Alam HB

BACKGROUND: Complicated acute diverticulitis (CAD) requiring an urgent operation is usually managed by fecal diversion (FD) despite reports suggesting that primary repair (PR) is safe. We aim to identify patient characteristics predicting successful PR and explore if patients are managed by FD despite the presence of such characteristics. METHODS: We reviewed the medical records of 194 patients with CAD, requiring colectomy within 48 hr of admission from January 1996 to January 2006. Exclusion criteria included: admission for elective repair, treatment with antibiotics and/or percutaneous abscess drainage prior to operation (semi-elective), concurrent inflammatory disease, cancer, and inadequate documentation. Univariate and multivariate analysis identified independent predictors of PR. Patients who despite having these independent predictors underwent FD, were compared with the PR group. RESULTS: Eighteen patients (9%) received PR. They were younger than FD patients, had a lower incidence of left-sided disease, were less frequently operated on within 4 hr of hospital arrival, and had less severe disease (Hinchey I or II). They also had shorter postoperative hospital stays (6.2 +/- 2.3 vs 14.6 +/-16.1; P = .002) and a trend towards a lower mortality (0% vs 6.8%; P = .38). The independent predictors of performing PR included: age less than 55 years, interval between admission and operation longer than 4 hr, and a Hinchey score I or II. There were 71 patients who had 2 (64) or all 3 (7) independent predictors of PR but still received FD. These patients were not different in any characteristic from the PR patients but had worse outcomes. CONCLUSION: FD remains the prevailing operative method of choice of CAD. Despite the presence of factors favoring PR, many patients still receive FD and have worse outcomes. PR can be used more liberally in CAD.

PMID: 20378139 [PubMed - as supplied by publisher]

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Utility of response evaluation to neo-adjuvant chemotherapy by (18)F-fluorodeoxyglucose-positron emission tomography in locally advanced esophageal squamous cell carcinoma.

Surgery. 2010 Apr 6;

Authors: Makino T, Miyata H, Yamasaki M, Fujiwara Y, Takiguchi S, Nakajima K, Higuchi I, Hatazawa J, Mori M, Doki Y

BACKGROUND: Neoadjuvant chemotherapy (NACT) has been frequently used for locally advanced esophageal squamous cell cancer (ESCC). It is therefore important to establish criteria for evaluating the response to NACT based on survival analysis. METHODS: This study analyzed 100 patients with ESCC (cT1, 2/3/4:25/57/18, cN0/1/M1lym: 5/59/36) who received NACT (5-fluorouracil, adriamycin, and cisplatin) followed by surgical resection. NACT response was monitored using (18)F-fluorodeoxyglucose-positron emission tomography (PET) and computed tomography by measuring pre- and post-NACT maximal standardized uptake value (SUVmax) and area of primary tumor, respectively. The associations between NACT and clinicopathological factors including prognosis were analyzed. RESULTS: The mean +/- SEM values of pre- and post-NACT SUVmax were 12.23 +/- 4.62 and 6.31 +/- 5.41, respectively, and the mean/median SUVmax reduction was 59.50%/73.45%. The most significant difference in survival between responders and non-responders was at 70% of cutoff value based on every 10% stepwise cutoff analysis (2-year progression-free survival [PFS]: 57.7% vs 25.1%; hazard ratio [HR] = 2.864; P = .0004). Univariate analysis indicated a correlation between PFS and number of cN before NACT, SUVmax reduction, decrease in tumor area, pT, and number of pN, while cT before NACT and pathological response to NACT showed no association. Multivariate analysis identified number of cN before NACT (HR = 2.537; P = .0092), SUVmax reduction (HR = 3.202; P = .0072), and number of pN (HR = 2.226; P = .0146) as independent prognostic predictors. CONCLUSION: By determining the optimal cutoff value based on survival analysis, we evaluated patient responses to NACT using PET. Such evaluation could be valuable in formulating treatment strategies for ESCC.

PMID: 20378140 [PubMed - as supplied by publisher]

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Immunogene therapy against colon cancer metastasis using an adenovirus vector expressing CD40 ligand.

Surgery. 2010 Apr 6;

Authors: Iida T, Shiba H, Misawa T, Ohashi T, Eto Y, Yanaga K

BACKGROUND: Colon cancer is one of the most common cancers worldwide, and liver metastasis is a poor prognostic factor for all types of digestive cancers, including colon cancer. We studied CD40 ligand (CD40L)-mediated immunogene therapy for metastatic liver cancer in rats. METHODS: We studied whether in vitro infection of a rat colon cancer cell line (RCN9) with an adenoviral-vector that expresses the CD40L (AxCAmCD40L) induced CD40L expression. In vivo to confirm the antitumor effect induced by AxCAmCD40L, the tumor cells that had been transduced by AxCAmCD40L were implanted into the subcutaneous tissues of syngenic rats (prevention model) or AxCAmCD40L was injected into the tumor tissues of the rats (treatment model). Furthermore, immune cells including NK cells, cytotoxic T cells, and tumor-specific antibodies induced by AxCAmCD40L were examined. RESULTS: Immunogene therapy using AxCAmCD40L suppressed the tumor growth strongly or reduced tumor size in the prevention model and treatment model. NK cells, cytotoxic T cells, and tumor-specific antibodies contributed to this antitumor effect in both groups. CONCLUSION: These observations suggest that CD40L-mediated immunogene therapy for metastatic colon cancer in the liver and lungs is effective and is mediated by the activation of both the cellular and humoral immune systems.

PMID: 20378141 [PubMed - as supplied by publisher]

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Effect of early plasma transfusion on mortality in patients with ruptured abdominal aortic aneurysm.

Surgery. 2010 Apr 6;

Authors: Mell MW, O’Neil AS, Callcut RA, Acher CW, Hoch JR, Tefera G, Turnipseed WD

BACKGROUND: The ratio of red blood cell (PRBC) transfusion to plasma (FFP) transfusion (PRBC:FFP ratio) has been shown to impact survival in trauma patients with massive hemorrhage. The purpose of this study was to determine the effect of the PRBC:FFP ratio on mortality for patients with massive hemorrhage after ruptured abdominal aortic aneurysm (RAAA). METHODS: A retrospective review was performed of patients undergoing emergent open RAAA repair from January 1987 to December 2007. Patients with massive hemorrhage (>/=10 units of blood products transfused prior to conclusion of the operation) were included. The effects of patient demographics, admission vital signs, laboratory values, peri-operative variables, amount of blood products transfused, and the PRBC:FFP ratio on 30-day mortality were analyzed by multivariate analysis. RESULTS: One hundred and twenty-eight of the 168 (76%) patients undergoing repair for RAAA received at least 10 units of blood products within the peri-operative period. Mean age was 73.1 +/- 9.1 years, and 109 (85%) were men. Thirty-day mortality was 22.6% (29/128), including 11 intra-operative deaths. By multivariate analysis, 30-day mortality was markedly lower (15% vs 39%; P < .03) for patients transfused at a PRBC:FFP ratio </=2:1 (HIGH FFP group) compared with those transfused at a ratio of >2:1 (LOW FFP), and the likelihood of death was more than 4-fold greater in the LOW FFP group (odds ratio 4.23; 95% confidence interval, 1.2-14.49). Patients in the HIGH FFP group had a significantly lower incidence of colon ischemia than those in the LOW FFP group (22.4% vs 41.1%; P = .004). CONCLUSION: For RAAA patients requiring massive transfusion, more equivalent transfusion of PRBC to FFP (HIGH FFP) was independently associated with lower 30-day mortality. The lower incidence of colonic ischemia in the HIGH FFP group may suggest an additional benefit of early plasma transfusion that could translate into further mortality reduction. Analysis from this study suggests the potential feasibility for a more standardized protocol of initial resuscitation for these patients, and prospective studies are warranted to determine the optimum PRBC:FFP ratio in RAAA patients.

PMID: 20378142 [PubMed - as supplied by publisher]

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Intra-operative freehand real-time elastography for small focal liver lesions: “Visual palpation” for non-palpable tumors.

Surgery. 2010 Apr 1;

Authors: Inoue Y, Takahashi M, Arita J, Aoki T, Hasegawa K, Beck Y, Makuuchi M, Kokudo N

BACKGROUND: Freehand real-time elastography (RTE) has seldom been used to visualize abdominal organs due to their complicated structure and difficulty in freehand compression. We describe a novel, intra-operative imaging system for performing freehand RTE of the liver. METHODS: An RTE system was designed using a spatial, cross-correlation method equipped with a feedback function that checks the quality and quantity of the external compression. Intra-operative freehand RTE was performed for 27 adenocarcinomas, 18 hepatocellular carcinomas (HCCs), and 11 benign lesions after routine B-mode intra-operative ultrasonography (IOUS). Elasticity images were classified into 4 types, from type A (more or comparable strain relative to the background) to type D (no strain), according to the degree of strain contrast with the surrounding liver. We then evaluated the compliance of the RTE findings with the pathologic diagnosis. RESULTS: RTE images were obtained for all the lesions except for 1 metastatic adenocarcinoma. Fourteen of the 18 HCCs were classified as type B or C, with a sensitivity of 83%, a specificity of 76%, and an accuracy of 61%, while 22 of the 26 adenocarcinomas were classified as type D, with a sensitivity of 85%, a specificity of 86%, and an accuracy of 86%. For 15 lesions, clear images were difficult to obtain using B-mode IOUS, whereas RTE visualized clearly the differences in elasticity. CONCLUSION: Our new RTE system facilitated the successful freehand RTE of liver lesions in an intra-operative setting, enabling “visual palpation” during liver surgery and serving as a supportive modality for B mode IOUS.

PMID: 20363009 [PubMed - as supplied by publisher]

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Surgery for intestinal Crohn’s disease recurrence.

Surgery. 2010 Apr 1;

Authors: Brouquet A, Blanc B, Bretagnol F, Valleur P, Bouhnik Y, Panis Y

BACKGROUND: Operative therapy for Crohn’s disease (CD) recurrence is supposed to be more complex and demanding than primary resection. The purpose of this study was to assess a postoperative course after reoperation for the recurrence of CD. METHODS: From 1998 to 2008, 61 patients underwent reoperation for the recurrence of CD. First, risk factors for postoperative morbidity, with special reference to major postoperative complications, were analyzed. Second, a case-matched study was used to compare the postoperative morbidity of 54 ileocolonic resections for the recurrence of CD (reoperation group) with 57 identical primary ileocolonic resections (primary resection group) according to matching criteria (age, fistulizing or stenotic disease, pre-operative steroids therapy, pre-operative general status, and surgical approach). RESULTS: Postoperative mortality was nil. Postoperative complications were observed in 23 cases (38%). Of these cases, 6 (10%) had major complications (2 anastomotic leakages and 6 intra-abdominal abscesses requiring radiological drainage). Univariate analysis did not identify risk for major complication. None of the 14 patients with temporary stoma developed a major complication (NS). A case-matched study showed a higher morbidity rate (21/54 vs 5/57; P = .0006) with a greater risk of postoperative intra-abdominal abscess (9/59 vs 1/59; P = .007) and a longer postoperative hospital stay in reoperation versus the primary resection group (9 vs 7 days; P < .001). CONCLUSION: Reoperation for CD recurrence is demanding and complex with a frequent need for an associated surgical procedure (because of the severity of the disease and/or adherences). It also is associated with a higher morbidity rate and a longer hospital stay than primary resection. For these reasons, the indication of temporary defunctionning stoma should be discussed systematically in these patients.

PMID: 20363010 [PubMed - as supplied by publisher]

An adrenal mass.

Surgery. 2010 Apr;147(4):586-8

Authors: Anderson EJ, Papavero VG, Flaherty JP

PMID: 20361414 [PubMed - in process]

An adrenal mass.

Surgery. 2010 Apr;147(4):586-8

Authors: Anderson EJ, Papavero VG, Flaherty JP

PMID: 20361414 [PubMed - in process]

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A prospective comparison of preperitoneal tension-free open herniorrhaphy with mesh plug herniorrhaphy for the treatment of femoral hernias.

Surgery. 2010 Mar 30;

Authors: Chen J, Lv Y, Shen Y, Liu S, Wang M

BACKGROUND: Although many techniques exist for hernia repair, controversy still exists as to the best management of femoral hernias. We compared the preperitoneal approach with the mesh plug technique for the treatment of femoral hernias. METHODS: In this prospective study, 85 patients with primary unilateral femoral hernias were assigned randomly to a preperitoneal group (n = 45; 10 males, 35 females) and a mesh plug group (n = 40; 10 males, 30 females). Polypropylene patches or plugs were used, and all operations were performed by the same team. Patient demographics, recurrence rate, duration of hospital stay, and complications were recorded. The duration of follow-up ranged from 6 to 78 months. RESULTS: There were no differences between the groups with respect to operative time, postoperative duration of stay, pain assessed by visual analog scale, or wound infection rate. There were no recurrences in the preperitoneal group, whereas there were 4 (10%) recurrences in the mesh plug group. In the preperitoneal group, no patient complained of a foreign body sensation, whereas in the mesh plug group, 6 patients (15%) had the sensation of a “foreign body” in the groin. In the preperitoneal group, there were 2 cases (4%) of seroma that occurred 3 and 5 days after operation. In the mesh plug group, 8 cases (20%) of seroma occurred 3-7 days after operation. CONCLUSION: Preperitoneal herniorrhaphy seems to be associated with a lesser recurrence rate, less sensation of a foreign body postoperatively, and a lesser incidence of seroma formation compared with the mesh plug technique in the repair of femoral hernias. Preperitoneal herniorrhaphy provides better vision of the operative field, is flexible, and allows exploration of the inguinal canal during the procedure.

PMID: 20356615 [PubMed - as supplied by publisher]

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Complicated hernia presentation in patients with advanced cirrhosis and refractory ascites: Management and outcome.

Surgery. 2010 Mar 24;

Authors: Telem DA, Schiano T, Divino CM

PURPOSE: To determine optimal management of and outcome after umbilical herniorrhaphy in patients with advanced cirrhosis and refractory ascites. METHODS: A retrospective chart review was performed of 21 patients with advanced cirrhosis who underwent umbilical herniorrhaphy at The Mount Sinai Medical Center from 2002 to 2008. Univariate, multivariate, and Kaplan-Meier analysis was performed. RESULTS: Twenty-one patients had refractory ascites: 15 presented with incarceration and 6 with spontaneous umbilical rupture. The mortality rate was 5% and morbidity rate 71%. Two patients required peri-operative liver transplantation, and 5 developed ascites-related wound complications. Follow-up at a mean of 36 months demonstrated a 20% mortality rate due to liver disease; 5% required liver transplantation and 6% had a recurrent hernia. In addition to diuretics and albumin, peri-operative management of ascites consisted of pre-operative transjugular intrahepatic portosystemic shunt (TIPS; n = 6), postoperative TIPS (n = 2), and closed-suction drains (n = 7). The wound complication rate was 17% in patients who underwent preoperative TIPS versus 27% in patients who did not undergo pre-operative TIPS (P = NS). TIPS placement postoperatively controlled ascites adequately without additional complication in 2 patients. In this series, use of closed-suction drains did not appear to decrease ascites-related complications. Spontaneous umbilical rupture was an independent risk factor for adverse outcome. For patients presenting with umbilical rupture, preoperative TIPS and semi-elective repair appeared to improve peri-operative and 36-month outcome as compared with emergent repair. CONCLUSION: Pre-operative TIPS in conjunction with semi-elective repair when feasible appears preferable, particularly for patients with spontaneous umbilical rupture. The lower than anticipated mortality rate was attributed to institutional experience and to the multidisciplinary approach to patient care.

PMID: 20346479 [PubMed - as supplied by publisher]

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Effect of smoking, smoking cessation, and nicotine patch on wound dimension, vitamin C, and systemic markers of collagen metabolism.

Surgery. 2010 Mar 27;

Authors: Sørensen LT, Toft BG, Rygaard J, Ladelund S, Paddon M, James T, Taylor R, Gottrup F

BACKGROUND: Postoperative wound disruption and tissue-destructive disorders are more frequent in smokers than in nonsmokers. Impaired wound healing and altered connective tissue turnover are suggested mechanisms, but exact details remain unknown. METHODS: Full-thickness, 5-mm punch biopsy wounds were made lateral to the sacrum in 48 smokers and were randomized double-blinded to continuous smoking, abstinence with transdermal nicotine patch (TNP), or abstinence with placebo patch and 30 never smokers. At 1, 4, 8, and 12 weeks, the wounds were excised and fixed for wound measurement, and blood was collected for measurement of vitamin C, procollagen I N-propeptide (PINP), matrix metalloproteinase 8 (MMP), MMP-9, neutrophils, and eosinophils. RESULTS: One week after wounding, smokers’ wounds were 3.1 +/- 0.1 mm (mean, standard error of the mean) wide and were 1.3 +/- 0.1 mm deep compared with the never smokers’ wounds, measuring 3.7 +/- 0.1 mm wide and 1.5 +/- 0.1 mm deep (P < .01, respectively). Abstinent smokers’ wounds were 3.3 +/- 0.1 mm wide (NS) and were 1.4 +/- 0.1 mm deep (P = .02 compared with smokers). In smokers, vitamin C and PINP were 50.5 +/- 9.0 mumol/L and were 52.7 +/- 6.6 ng/mL, respectively, compared with 68.8 +/- 14.5 mumolL and 64.7 +/- 4.7 ng/mL in never smokers (P < .001 and P = .07). Both increased significantly after smoking cessation. Plasma MMP-8 and MMP-9 were correlated with neutrophil blood count, which significantly was affected by smoking status. No effect of TNP was found. CONCLUSION: Smokers have smaller, more superficial wounds and lesser blood levels of vitamin C and PINP. Smoking cessation resulted in increased wound depth, vitamin C, and PINP as well as a decreased neutrophil blood count. These findings suggest that wound contraction and collagen metabolism are affected by a smoking-induced alteration in vitamin C turnover and by a change in inflammatory cell response.

PMID: 20347467 [PubMed - as supplied by publisher]

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Indeterminate thyroid nodules: A challenge for the surgical strategy.

Surgery. 2010 Mar 23;

Authors: Asari R, Niederle BE, Scheuba C, Riss P, Koperek O, Kaserer K, Niederle B

BACKGROUND: Because no clinical parameter can establish the final status of a cytologically indeterminate thyroid nodule (ITN) or nodal-metastases in case of malignancy, the initial surgical strategy should define an oncologically adequate procedure with low morbidity. METHODS: The prognostic relevance of sex, age, tumor sizes, multifocality, thyroid function, and recurrence was analyzed in 156 consecutive patients according to the presence of malignancy and nodal metastases. The accuracy of frozen sections to reveal malignancy was determined. Clinical parameters were compared with regard to their ability to identify malignancy and nodal metastases in an ITN to determine an appropriate initial operative strategy. RESULTS: One hundred and eighteen (75.6%) patients underwent (total) thyroidectomy, 37 (23.7%) patients underwent hemithyroidectomy, and 1 patient underwent isthmus resection. Fifty-five (35.3%) patients showed malignancy. First step lymphadenectomy (lymph node dissection along the recurrent laryngeal nerve before removing the thyroid lobe) was performed in 142 patients documenting 10 nodal metastases. Comparing benign and malignant ITN, no association was found for sex (P = .17), age (P = 1.0), tumor sizes (P = .33, P = .12, P = .19 for </=30 mm, </=40 mm, and </=50 mm, respectively), or thyroid function (P = .26). The determination of malignancy by frozen section showed a sensitivity of 30.9% and a specificity of 100%. No permanent hypoparathyroidism or recurrent laryngeal nerve palsy was observed postoperatively. CONCLUSION: Because of the failure of available clinical parameters to predict malignancy in cytologically ITN, hemithyroidectomy in unilateral goiter and thyroidectomy in bilateral goiter is recommended. Ipsilateral “first step central neck dissection” on the side of ITN offers the advantages of oncologically adequate resection and staging with a low morbidity, as well as avoids reoperation.

PMID: 20338609 [PubMed - as supplied by publisher]

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The efficacy of a hyaluronate-carboxymethylcellulose bioresorbable membrane that reduces postoperative adhesions is increased by the intra-operative co-administration of a neurokinin 1 receptor antagonist in a rat model.

Surgery. 2010 Mar 23;

Authors: Lim R, Stucchi AF, Morrill JM, Reed KL, Lynch R, Becker JM

BACKGROUND: Bioresorbable membranes composed of hyaluronic acid and carboxymethylcellulose (HA/CMC) are the most effective method to prevent intra-abdominal adhesions; however, their efficacy may be limited to the site of application. Previous studies in our laboratory have shown that the intraperitoneal administration of a neurokinin-1 receptor antagonist (NK-1RA) reduces adhesions; however, the co-administration of HA/CMC plus an NK-1RA has not been studied. METHODS: Adhesions were induced in rats by creating ischemic buttons on the peritoneum. Rats received NK-1RA, HA/CMC, HA/CMC+NK-1RA or saline intraperitoneally at surgery. The HA/CMC was applied either bilaterally over all ischemic buttons or unilaterally over half the ischemic buttons. Animals were sacrificed and adhesions quantified at 7 days. Peritoneal fluid was collected at 24 hours to measure peritoneal tissue plasminogen activator (tPA) activity using a bioassay. RESULTS: The bilateral placement of HA/CMC alone reduced adhesions by 62% (P < .05) while the NK-1RA when administered alone reduced adhesions by 45% (P < .05), both groups compared with saline controls. The bilateral placement of HA/CMC+ NK-1RA decreased adhesions by 86% (P < .05) compared with saline controls and by 70% (P < .05) compared with either HA/CMC or NK-1RA alone. Unilateral application of HA/CMC resulted in a 41% decrease (P < .05) in adhesions where placed compared with the distal unprotected buttons in the same animal. However, the unilateral placement of HA/CMC+NK-1RA reduced adhesions by nearly 75% (P < .05) at the site of HA/CMC application compared with HA/CMC + saline, and by 45% (P < .05) at the distal unprotected buttons compared with saline controls. HA/CMC and the NK-1RA alone as well as HA/CMC+NK-1RA increased peritoneal tPA activity by 124%, 432%, and 192%, respectively (P < .05) compared with saline controls. CONCLUSION: The co-administration of HA/CMC plus NK-1RA not only increases the efficacy of the membrane at the site of application, but significantly reduces adhesions formation at distal unprotected sites. This combination may represent an emerging concept in more effective adhesion prevention throughout the peritoneum.

PMID: 20338610 [PubMed - as supplied by publisher]

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Research and the independent academic medical center.

Surgery. 2010 Mar;147(3):313-7

Authors: Helling TS

PMID: 20176242 [PubMed - indexed for MEDLINE]

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Withdrawal of care in a potentially curable patient.

Surgery. 2010 Mar;147(3):441-5

Authors: Murphy J, Fayanju O, Brown D, Kodner IJ

PMID: 20176245 [PubMed - indexed for MEDLINE]

Incisional ventral hernias: Review of the literature and recommendations regarding the grading and technique of repair.

Surgery. 2010 Mar 19;

Authors: , Breuing K, Butler CE, Ferzoco S, Franz M, Hultman CS, Kilbridge JF, Rosen M, Silverman RP, Vargo D

Despite advances in surgical technique and prosthetic technologies, the risks for recurrence and infection are high following the repair of incisional ventral hernias. High-quality data suggest that all ventral hernia repairs should be reinforced with prosthetic repair materials. The current standard for reinforced hernia repair is synthetic mesh, which can reduce the risk for recurrence in many patients. However, permanent synthetic mesh can pose a serious clinical problem in the setting of infection. Assessing patients’ risk for wound infection and other surgical-site occurrences, therefore, is an outstanding need. To our knowledge, there currently exists no consensus in the literature regarding the accurate assessment of risk of surgical-site occurrences in association with or the appropriate techniques for the repair of incisional ventral hernias. This article proposes a novel hernia grading system based on risk factor characteristics of the patient and the wound. Using this system, surgeons may better assess each patient’s risk for surgical-site occurrences and thereby select the appropriate surgical technique, repair material, and overall clinical approach for the patient. A generalized approach and technical considerations for the repair of incisional ventral hernias are outlined, including the appropriate use of component separation and the growing role of biologic repair materials.

PMID: 20304452 [PubMed - as supplied by publisher]

Evaluation of a pediatric protocol of intrapleural urokinase for pleural empyema: A prospective study.

Surgery. 2010 Mar 19;

Authors: Stefanutti G, Ghirardo V, Barbato A, Gamba P

BACKGROUND: Intrapleural urokinase has been shown to be effective in the treatment of pleural effusions in children. However, optimal dosing in children is debated. The aim of this study was to prospectively evaluate a specific pediatric protocol of intrapleural urokinase. METHODS: All children admitted to a single institution over a 6-year period with a diagnosis of pleural empyema were managed with chest tube and fibrinolytics. Clinical data were collected prospectively. Urokinase (56,000 IU in 56 mL saline/m(2) body surface) was administered twice daily, and was continued until resolution of the effusion. Further operative treatment was considered if urokinase treatment was unsuccessful after >/=3 days. Results are shown as median values (interquartile range). RESULTS: Forty-one consecutive children aged 4.4 (3.2-6.9) years were included in the study, and received 420,000 (280,000-750,000) IU of urokinase over 7 (4-8) days. Suction through the chest drain was applied for 8 (6-10) days, and IV antibiotics were discontinued after 12 (10-15) days from the start of intrapleural fibrinolytics. Four children (9.8%) required 5 additional operative procedures (3 thoracoscopic debridements and 2 minithoracotomic debridements). Patients were discharged after 13 (11-16) days from the beginning of intrapleural urokinase. No major side effects attributable to urokinase were observed. CONCLUSION: Intrapleural instillation of urokinase according to a specific pediatric protocol results in a high success rate when applied as a primary treatment in children with pleural empyema. Administration of a size-adjusted dose of urokinase proved to be safe and could optimize drug utilization.

PMID: 20304453 [PubMed - as supplied by publisher]

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Benchmarking the quality of care of infants with low-risk gastroschisis using a novel risk stratification index.

Surgery. 2010 Mar 15;

Authors: Chang DC, Salazar-Osuna JH, Choo SS, Arnold MA, Colombani PM, Abdullah F

BACKGROUND: The nationwide mortality of neonates with gastroschisis was compared to determine whether significant variations in outcome occurred at the hospital level. METHODS: Utilizing a previously developed risk-stratification index, low-risk neonates with gastroschisis were identified by a score of </=2. Only hospitals that had a record of treating >25 low-risk neonates were included in the analysis. Hospital performance in treating infants with gastroschisis was categorized into moderate and extreme outliers. RESULTS: A total of 4,344 neonates with gastroschisis were identified at 506 individual hospitals. Low-risk neonates had an overall mortality of 2.9% compared with high-risk neonates whose overall mortality was 24.4%. Forty hospitals treated >25 low-risk neonates in the years studied for a total of 1,775 low-risk patients. The mean, in-hospital mortality of this cohort was 3.1% (range, 0-14.3). Eight hospitals were moderate outliers with mortality rates between 3.8% and 8.0%. Two hospitals were extreme outliers with mortality rates of 8.6% and 14.3%. CONCLUSION: A substantial variation exists in the mortality of neonates with low-risk gastroschisis across hospitals. Further improvements in survival may, thus, depend on targeting quality improvement initiatives to standardization of operative approaches as well improvements in nonoperative factors such as neonatal intensive care unit practices, nurse-to-patient ratios, and levels of intensivist staffing.

PMID: 20236674 [PubMed - as supplied by publisher]

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Correlation between indeterminate aspiration cytology and final histopathology of thyroid neoplasms.

Surgery. 2010 Mar 15;

Authors: Pang T, Gill A, McMullen T, Sywak M, Sidhu S, Delbridge L

BACKGROUND: Of all thyroid nodules assessed by fine needle aspiration cytology (FNAC), 10-20% are classified as indeterminate/atypical. Traditionally, this group is considered to primarily represent follicular neoplasia. We hypothesize that papillary carcinoma accounts for a significant proportion of lesions classified as “atypical” on FNAC. METHODS: This retrospective study includes 228 patients who had an atypical FNAC result and who were subsequently found to have a malignancy on histologic examination of the excised thyroid lesion. Patients with papillary microcarcinomas, defined as lesions less than 10-mm diameter, were excluded. The study period was from 1987 to 2005. The patients were divided chronologically into 3 groups (n = 76) for analysis: group 1, December 1987-March 1997; group 2, July 1997-October 2002; and group 3, October 2002-December 2005. RESULTS: Age- and sex-distribution of the 3 groups were not significantly different. Median nodule size of group 3 was significantly smaller. The distributions of histopathology of the 3 time periods were significantly different overall (P = .0325). Prevalence of papillary carcinoma was not statistically significant (33/76 vs 34/76 vs 46/76; P = .0636), but showed a statistical significant trend to increase over time (P = .0349). Prevalence of follicular variant papillary carcinoma was also found to be significantly different between the groups (7/76 vs 12/76 vs 19/76; P = .0320; P = .0349). CONCLUSION: Papillary carcinoma accounted for most histopathologically confirmed cancers that had an atypical cytology. Papillary cancer in this group of patients trended up, probably due to a significant increase in the diagnosis of follicular variant of papillary cancer.

PMID: 20236675 [PubMed - as supplied by publisher]

Vacuum-assisted closure in severe abdominal sepsis with or without retention sutured sequential fascial closure: A clinical trial.

Surgery. 2010 Mar 12;

Authors: Pliakos I, Papavramidis TS, Mihalopoulos N, Koulouris H, Kesisoglou I, Konstantinos Sapalidis , Deligiannidis N, Papavramidis S

BACKGROUND: Multiple techniques have been introduced to obtain fascial closure for the open abdomen to minimize morbidity and cost of care. We hypothesized that a modification of the vacuum-assisted closure (VAC) technique that provides constant fascial tension and prevents abdominis rectis retraction would facilitate primary fascial closure and reduce morbidity. METHODS: In all, 53 patients with severe abdominal sepsis were allocated randomly into 2 groups, and 30 patients were analyzed. In the VAC group, we included patients managed only with the VAC device, whereas the retentions sutured sequential fascial closure (RSSFC) group included patients to whom RSSFC was performed. RESULTS: The abdomen was left open for 12 days (P = .0001) with 4.4 +/- 1.35 changes per patient for the VAC group (P = .001) and 8 days with 2.87 +/- 0.74 dressing changes per patient for the RSSFC group, respectively. Abdominal closure was possible in only 6 patients in the VAC group, whereas for the RSSFC group, abdominal closure was achieved in 14 patients (P = .005). Planned hernia was exclusively decided in patients in the VAC group (P = .001). The hospital stay was 17.53 +/- 4.59 days for the VAC group and 11.93 +/- 2.05 days for the RSSFC group (P = .0001). The median initial intra-abdominal pressure (IAP) was 12 mm Hg for the VAC group and 16 mm Hg for the RSSFC group (P < .0001). CONCLUSION: We demonstrated the superiority of RSSFC compared with the single use of the VAC device. In our opinion, sequential fascial closure can immediately begin when abdominal sepsis is controlled.

PMID: 20227097 [PubMed - as supplied by publisher]

Is impaired hepatic arterial buffer response a risk factor for biliary anastomotic stricture in liver transplant recipients?

Surgery. 2010 Mar 12;

Authors: Hashimoto K, Miller CM, Quintini C, Aucejo FN, Hirose K, Uso TD, Trenti L, Kelly DM, Winans CG, Vogt DP, Eghtesad B, Fung JJ

BACKGROUND: Blood flow to the liver is partly maintained by the hepatic arterial buffer response (HABR), which is an intrinsic autoregulatory mechanism. Temporary clamping of the portal vein (PV) results in augmentation in hepatic artery flow (augHAF). Portal hyperperfusion impairs HAF due to the HABR in liver transplantation (LT). The aim of this study is to examine the effect of the HABR on biliary anastomotic stricture (BAS). METHODS: In 234 cadaveric whole LTs, PV flow (PVF), basal HAF, and augHAF were measured intra-operatively after allograft implantation. All recipients with a vascular complication were excluded. Buffer capacity (BC) was calculated as (augHAF – basal HAF)/PVF to quantify the HABR. Recipients were divided into 2 groups based on their BC: low BC (<0.074; n = 117) or high BC (>/=0.074; n = 117). RESULTS: Of the 234 recipients, 23 (9.8%) had early BAS (</=60 days after LT) and 18 (7.7%) had late BAS (>60 days after LT). The incidence of late BAS and bile leakage was similar between the groups; however, the incidence of early BAS in the low BC group was greater than that in the high BC group (15% vs 5.1%, P = .0168). In the multivariate analysis, low BC (P = .0325) and bile leakage (P = .0002) were found to be independent risk factors affecting early BAS. CONCLUSION: Recipients with low BC who may have impaired HABR are at greater risk of early BAS after LT. Intra-operative measurements of blood flow help predict the risk of BAS.

PMID: 20227098 [PubMed - as supplied by publisher]

Effects of peri-operative immunonutrition on cell-mediated immunity, T helper type 1 (Th1)/Th2 differentiation, and Th17 response after pancreaticoduodenectomy.

Surgery. 2010 Mar 11;

Authors: Suzuki D, Furukawa K, Kimura F, Shimizu H, Yoshidome H, Ohtsuka M, Kato A, Yoshitomi H, Miyazaki M

BACKGROUND: The mechanisms of immunonutrition on reducing infectious complications are still poorly understood. This prospective randomized study was designed to determine whether immunonutrition influences the following factors: cell-mediated immunity, differentiation of T helper type 1 (Th1) and Th2 cells, interleukin (IL)-17-producing CD4(+) helper T (Th17) cell response, and infectious complication rate after pancreaticoduodenectomy. METHODS: Thirty patients who underwent pancreaticoduodenectomy were divided into 3 groups. Ten patients in the peri-operative group received immune-enhancing diets enriched with arginine, omega-3 fatty acids, and RNA for 5 days before operative resection, which was prolonged after operative resection by enteral infusion. Ten patients in the postoperative group received early postoperative enteral infusion of the same enriched formula with no artificial nutrition before operative resection. Ten patients in the control group received total parenteral nutrition postoperatively. The primary endpoint was immune responses; the secondary endpoint was the rate of infectious complications. RESULTS: Concanavalin A (Con A)- or phytohemagglutinin (PHA)-stimulated lymphocyte proliferation and natural killer cell activity were significantly higher in the perioperative group than in the other groups. Messenger RNA (mRNA) expression levels of T-bet, interferon-gamma (IFN-gamma), related orphan receptor gammat (RORgammat), and interleukin-17F (IL-17F) were significantly higher in the peri-operative group than in the other groups. In the peri-operative group, the rate of infectious complications was significantly reduced compared with that in the other groups. CONCLUSION: Peri-operative immunonutrition reduced stress-induced immunosuppression after a major stressful operative resection. The modulation of Th1/Th2 differentiation and Th17 response may play important roles in this immunologic effect.

PMID: 20227099 [PubMed - as supplied by publisher]

The intra-operative Surgical Apgar Score predicts postdischarge complications after colon and rectal resection.

Surgery. 2010 Mar 11;

Authors: Regenbogen SE, Bordeianou L, Hutter MM, Gawande AA

BACKGROUND: We previously developed an intra-operative 10-point Surgical Apgar Score-based on blood loss, lowest heart rate, and lowest mean arterial pressure-to predict major complications after colorectal resection. However, because complications often arise after uncomplicated hospitalizations, we sought to evaluate whether this intra-operative metric would predict postdischarge complications after colectomy. METHODS: We linked our institution’s National Surgical Quality Improvement Program database with an Anesthesia Intra-operative Management System for all colorectal resections over 4 years. Using Chi-square trend tests and logistic regression, we evaluated the Surgical Apgar Score’s prediction for major postoperative complications before and after discharge. RESULTS: Among 795 colectomies, there were 230 (29%) major complications within 30 days; 45 (20%) after uncomplicated discharges. Surgical Apgar Scores predicted both inpatient complications and late postdischarge complications (both P < .0001). Late complications occurred from 0 to 27 (median, 11) days after discharge; the most common were surgical site infections (42%), sepsis (24%), and venous thromboembolism (16%). In pairwise comparisons against average-scoring patients (Surgical Apgar Scores, 7-8), the relative risk of postdischarge complications trended lower, to 0.6 (95% confidence interval [CI], 0.2-1.7) for those with the best scores (9-10); and were significantly higher, at 2.6 (95% CI, 1.4-4.9) for scores 5-6, and 4.5 (95% CI, 1.8-11.0) for scores 0-4. CONCLUSION: The intra-operative Surgical Apgar Score remained a useful metric for predicting postcolectomy complications arising after uncomplicated discharges. Even late complications may thus be related to intra-operative condition and events. Surgeons could use this intra-operative metric to target low-scoring patients for intensive postdischarge surveillance and mitigation of postdischarge complications after colectomy.

PMID: 20227100 [PubMed - as supplied by publisher]

Hepatocyte nuclear factor-kappa beta (NF-kappaB) activation is protective but is decreased in the cholestatic liver with endotoxemia.

Surgery. 2010 Mar 12;

Authors: Iida A, Yoshidome H, Shida T, Takano S, Takeuchi D, Kimura F, Shimizu H, Ohtsuka M, Miyazaki M

BACKGROUND: Obstructive jaundice (OJ) is an important clinical consideration associated with a high risk of bacteremia. Hepatocyte nuclear factor-kappa B (NF-kappaB) activation confers an antiapoptotic function. Although the occurrence of hepatocyte apoptosis has been shown in OJ, the activation and role of NF-kappaB over the time course of OJ in conjunction with endotoxemia have not yet been well defined. We hypothesized that NF-kappaB activation may be decreased over the time course of OJ and endotoxemia, which leads to severe liver injury. The aim of the current study was to examine whether NF-kappaB activation can decrease hepatocyte apoptosis and liver injury over the time course of OJ in response to lipopolysaccharide (LPS) administration. METHODS: Male C57BL/6 mice were subjected to bile duct ligation and were administered LPS intravenously at 3 days (OJ3) or 14 days (OJ14) after bile duct ligation. NF-kappaB activation; protein expressions of NF-kappaB p65, IkappaB-alpha, Ikappabeta-b, and Pin1; immunohistochemistry of poly adenosine diphosphate (ADP)-ribose polymerase p85 fragment (PARP); and serum alanine transaminase (ALT) levels were examined. RESULTS: Hepatocyte NF-kappaB activation was observed during OJ. After LPS administration, the hepatic NF-kappaB activation defined by electrophoretic mobility shift assay was decreased in the OJ14 group compared with the OJ3 group, which is consistent with a decrease in NF-kappaB p65 protein expression. Changes in phosphorylated Ikappa-B-beta but not phosphorylated IkappaB-alpha mirrored these results. Significant hepatocyte apoptosis defined by PARP immunohistochemistry was observed in the LPS-treated OJ14 relative to the LPS-treated OJ3. Hepatic expressions of tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) in the LPS OJ14 mice were upregulated relative to those in the LPS OJ3. Serum ALT levels increased significantly in the LPS OJ14 relative to other mice. The survival rate was significantly less in the LPS OJ14 relative to other mice. CONCLUSION: After prolonged OJ, exposure to endotoxemia was associated with a decrease in hepatocyte NF-kappaB activation and an increase in hepatocyte apoptosis and secondary necrosis, thus resulting in liver dysfunction.

PMID: 20227101 [PubMed - as supplied by publisher]

Medical students’ perceptions on factors influencing a surgical career: The fate of general surgery in Greece.

Surgery. 2010 Mar 10;

Authors: Pikoulis E, Avgerinos ED, Pedeli X, Karavokyros I, Bassios N, Anagnostopoulou S

BACKGROUND: A decline of medical students’ interest in a general surgery career is occurring in the Western medical world. We sought data on the mentality of Greek students toward specialty selection, and we determined whether trends indicated a decline in interest for general surgery in Greece. METHODS: A structured questionnaire was distributed to 3 groups of medical students: to pre-4th-year (group 1) surgical clerkship, post-4th-year (group 2) surgical clerkship, and post-6th-year internship students in surgery (group 3). The questions covered a wide spectrum of data including career choices, influential factors, and satisfaction rates on educational and training issues. RESULTS: From a total of 500 distributed questionnaires 363 were returned. Most students (63.1%) indicated preference toward nonsurgical (medical) specialties. Surgical specialties within the 3 groups gathered 19.5% (group 1), 26.5% (group 2) and 31.2% (group 3) preference rates. Among surgical specialties, general surgery was chosen by 29.4% in group 1, 10.0% in group 2, and 17.9% in group 3. The most common criterion for specialty selection was “quality of life” (68.6%) among group 1 students and “patient contact” for group 2 and group 3 students (77.3% and 65.3%, respectively). Among the 96 students who chose surgical specialties, the most common criterion for specialty selection was “scientific challenge” (100%) in group 1 and “patient contact” in groups 2 and 3 (62.5% and 69.2%, respectively). The 3 more frequently chosen factors that influenced the “picture” of surgery positively were attending live surgery cases in the operating room (37.6%), clinical experience (29.6%), and patient care (14.4%), followed by assisting in the operating room (8.8%). CONCLUSION: Our survey suggests a limited interest of Greek medical students for surgical specialties and general surgery in particular. As the medical curriculum is restructured, our data underscore the need for actions by surgical educators and medical school authorities so as to enhance the interest of medical students in general surgery in Greece.

PMID: 20223496 [PubMed - as supplied by publisher]

The antiendotoxin agent taurolidine potentially reduces ischemia/reperfusion injury through its metabolite taurine.

Surgery. 2010 Mar 10;

Authors: Doddakula KK, Neary PM, Wang JH, Sookhai S, O’Donnell A, Aherne T, Bouchier-Hayes DJ, Redmond HP

BACKGROUND: Cardiopulmonary bypass results in ischemia/reperfusion (I/R)-induced endotoxemia. We conducted a prospective randomized trial to investigate the effect of taurolidine, an antiendotoxin agent with antioxidant and membrane-stabilizing properties, on patients undergoing coronary artery bypass grafting (CABG). METHODS: A total of 60 patients undergoing CABG were randomized into 4 groups. St Thomas’ Hospital cold crystalloid cardioplegia was used in groups A and B, and cold blood cardioplegia in groups C and D. Groups A and C received a placebo infusion of normal saline, whereas groups B and D were administered intravenous taurolidine. Arrhythmias induced by pro- and anti-inflammatory cytokines (interleukin [IL]-6 and IL-10), and I/R were assessed perioperatively. RESULTS: Administration of taurolidine in crystalloid cardioplegia patients resulted in a significant decrease in serum IL-6 and an increase in serum IL-10 at 24 hours postaortic unclamping compared to placebo (P < .0001). Although not statistically significant, this trend in serum IL-6 decrease was mirrored in the blood cardioplegia patients (P = .068). Taurolidine treatment also significantly decreased I/R-induced arrhythmias compared to placebo in the crystalloid cardioplegia patients (P < .003). There were fewer I/R-induced arrhythmias compared to placebo in the blood cardioplegia patients; the difference, however, was marginal and not statistically significant (P = .583). CONCLUSION: This study demonstrates that administration of taurolidine in CABG patients induces a potent anti-inflammatory response that is associated with a significant decrease in arrhythmias.

PMID: 20223497 [PubMed - as supplied by publisher]

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Topical nanoemulsion therapy reduces bacterial wound infection and inflammation after burn injury.

Surgery. 2010 Feb 26;

Authors: Hemmila MR, Mattar A, Taddonio MA, Arbabi S, Hamouda T, Ward PA, Wang SC, Baker JR

BACKGROUND: Nanoemulsions are broadly antimicrobial oil-in-water emulsions containing nanometer-sized droplets stabilized with surfactants. We hypothesize that topical application of a nanoemulsion compound (NB-201) can attenuate burn wound infection. In addition to reducing infection, nanoemulsion therapy may modulate dermal inflammatory signaling and thereby lessen inflammation following thermal injury. METHODS: Male Sprague-Dawley rats underwent a 20% total body surface area scald burn to create a partial-thickness burn injury. Animals were resuscitated with Ringer’s lactate solution and the wound covered with an occlusive dressing. At 8 hours after injury, the burn wound was inoculated with 1 x 10(6) colony-forming units (CFUs) of Pseudomonas aeruginosa. NB-201, NB-201 placebo, 5% mafenide acetate solution, or 0.9% saline (control) was applied onto the wound at 16 and 24 hours after burn injury. Skin was harvested 32 hours postburn for quantitative wound culture and determination of inflammatory mediators in tissue homogenates. RESULTS: NB-201 decreased mean bacterial growth in the burn wound by 1000-fold, with only 13% (3/23) of animals having P. aeruginosa counts greater than 10(5) CFU/g tissue versus 91% (29/32) in the control group (P < .0001). Treatment with NB-201 attenuated neutrophil sequestration in the treatment group as measured by myeloperoxidase assay and by histology. It also significantly decreased levels of proinflammatory cytokines (interleukin [IL]-1beta and IL-6) and the degree of hair follicle cell apoptosis in skin compared to saline-treated controls. CONCLUSION: Topical NB-201 substantially decreased bacterial growth in a partial-thickness burn model. This decrease in the level of wound infection was associated with an attenuation of the local dermal inflammatory response and diminished neutrophil sequestration. NB-201 represents a novel potent antimicrobial and anti-inflammatory treatment for use in burn wounds.

PMID: 20189619 [PubMed - as supplied by publisher]

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Subclinical lymph node metastasis in papillary thyroid microcarcinoma: A study of 551 resections.

Surgery. 2010 Feb 26;

Authors: So YK, Son YI, Hong SD, Seo MY, Baek CH, Jeong HS, Chung MK

BACKGROUND: In clinically node-negative papillary thyroid microcarcinoma (PTMC), the frequency of subclinical lymph node metastasis (LNM) in the central cervical compartment (subclinical central LNM) has been reported to be as great as 65%. Routine prophylactic central compartment lymph node dissection (CLND) has been debated, because the risk of operative complications might outweigh its prognostic benefit. We aimed to study clinicopathologic factors associated with subclinical central LNM to be considered for determination of prophylactic CLND. METHODS: A total of 551 patients diagnosed with clinically node-negative PTMC from 2005 to 2009 were included. All patients underwent total thyroidectomy (TT) and prophylactic CLND. Clinicopathologic risk factors of subclinical central LNM were analyzed. In addition, we investigated recurrences and postoperative complications after TT and CLND. RESULTS: Among the 551 patients, 202 (37%) had subclinical central LNM. On univariate and multivariate analyses, male gender, tumor multifocality, and extrathyroidal extension were independently predictive of subclinical central LNM. During 3-year follow-up, there were no recurrences in the central cervical compartment. The frequency of permanent hypocalcemia and permanent vocal fold palsy were 1.1% and 1.3%, respectively. CONCLUSION: Frequency of subclinical central LNM was high in PTMC. It was managed effectively with prophylactic CLND. In addition, prophylactic CLND did not cause significant permanent morbidities. We recommend that clinicopathologic features, such as male gender, tumor multifocality, and extrathyroidal extension, be considered for determination of prophylactic CLND in patients with PTMC.

PMID: 20189620 [PubMed - as supplied by publisher]

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Traumatic diaphragmatic rupture complicated by intercostal tube insertion into the stomach.

Surgery. 2010 Feb 26;

Authors: Jana M, Hari S

PMID: 20189621 [PubMed - as supplied by publisher]

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The role of interleukin-1beta and platelet-derived growth factor-AB in antifibrosis mediated by native human interferon alpha.

Surgery. 2010 Feb 20;

Authors: Santak G, Santak M, Forčić D

BACKGROUND: Commercial preparations of native human interferon alpha (nHuIFN-alpha) contain several subtypes of interferon-alpha (IFN-alpha) and traces of other cytokines. Recently, we described its antifibrotic potential and showed nHuIFN-alpha to have a greater effect than that of recombinant human IFN-alpha (rHuIFN-alpha). We hypothesized that cooperation between different cytokines in the nHuIFN-alpha preparation is essential for this effect. Considerable concentrations of interleukin-1beta (IL-1beta) and platelet-derived growth factor AB (PDGF-AB) are present in the nHuIFN-alpha preparations. METHODS: We tested the viability and the expression of procollagen type I messenger RNA (mRNA) in MRC5 fibroblasts treated with interleukin-1 beta (IL-1beta) and/or PDGF-AB, or the corresponding antibodies in combination with rHuIFN-alpha or nHuIFN-alpha. RESULTS: We showed that neither IL-1beta nor PDGF-AB significantly affect the viability of MRC5 cells. Furthermore, cell viability was not affected when IL-1beta or PDGF-AB were applied along with rHuIFN-alpha, relative to the viability of cells treated with rHuIFN-alpha only. In contrast, both cytokines suppressed the synthesis of procollagen type I mRNA. When coadministered with rHuIFN-alpha, IL-1beta enhanced the suppression induced by rHuIFN-alpha. Conversely, PDGF-AB acted as an antagonist of rHuIFN-alpha and restored partially the synthesis of procollagen type I mRNA. Interestingly, the addition of IL-1beta to the PDGF-AB/rHuIFN-alpha mix not only abolished the antagonistic activity of PDGF-AB but also decreased the synthesis of procollagen type I mRNA beyond the level achieved by IL-1beta/rHuIFN-alpha. Therefore, IL-1beta was able to reverse the activity of PDGF-AB. CONCLUSION: Our study suggests that IL-1beta is an important component of nHuIFN-alpha preparations, acting directly and indirectly to modulate the action of other components. This study provides insight into these complex cytokine networks, which is necessary for better and safer antifibrotic therapy.

PMID: 20176391 [PubMed - as supplied by publisher]