Does Self-Assessment Improve the Effectiveness of Grand Rounds Lectures in a Community-Based Teaching Hospital?

OBJECTIVE: To determine whether use of self-assessment (SA) questions affects the effectiveness of weekly didactic grand rounds presentations. DESIGN: From 26 consecutive grand rounds presentations from August 2013 to April 2014, a 52-question multiple-choice test was administered based on 2 questions from each presentation. SETTING: Community teaching institution. PARTICIPANTS: General surgery residents, students, and attending physicians. RESULTS: The test was administered to 66 participants. The mean score was 41.8%. There was no difference in test score based on experience with similar scores for junior residents, senior residents, and attending surgeons (43%, 46%, and 44%; p = 0.13). Most participants felt they would be most interested in presentations directly related to their surgical specialty. Participants, however, did not score differently on topics which were the focus of the program (40% vs. 42%; p = 0.85). Journal club presentations (39% vs. others 42%; p = 0.33) also did not affect the score. The Pearson correlation coefficient for attendance was 0.49 (p < 0.0001) demonstrated that attendance was very important. Participation in the weekly SA was significantly associated with improved score as those who participated in SA scored over 20% higher than those who did not (59% vs. 38%; p < 0.0001). Based on multiple linear regression for mean score, SA explained the variation in score more than attendance. CONCLUSIONS: The current study found that without preparation approximately 40% of material presented is retained after 10 months. Participation in weekly SA significantly improved retention of information from grand rounds presentations.

A review of factors that affect mortality following colectomy.

BACKGROUND: The tightening focus on optimizing surgical outcomes has pushed tracking perioperative mortality to the forefront of interest. The goal of this study is to analyze factors affecting mortality after colorectal resection at a single tertiary care center. MATERIALS AND METHODS: Data were collected from a prospective database for all patients undergoing a colorectal resection at our institution over a 12-y period. Data points included patient demographics, comorbidities, operative details, clinical presentation, postoperative complications, and mortality. RESULTS: A total of 1245 patients were evaluated with 41 deaths (3.3%). Our population was 51% male with an average age of 60.1 ± 15.2 y, mean BMI of 27.5 ± 6.4 kg/m(2), average ASA score of 2.6 ± 0.9, and average of 2.2 ± 1.9 comorbidities. Preoperative factors associated with increased mortality included age, high ASA score, emergent surgery, and the presence of bowel perforation or obstruction (P < 0.05). Intra- and postoperative factors including the transfusion of blood products, length of resection, subtotal colectomy, open versus laparoscopic procedures, the need for reoperation, diagnosis and postoperative complications negatively impact survival (P < 0.05). Stepwise logistic regression demonstrated that high ASA score, emergent procedure, subtotal colectomy, age, obstruction, and open resection as the independent predictors of mortality in a stepwise logistic regression model (P < 0.10). CONCLUSION: Preoperative ASA, emergent procedure, age, open procedure, subtotal colectomy, and obstruction were the independent predictors of mortality in our review. Preoperative optimization and counseling of elderly patients with a high ASA score and/or those requiring an emergency operation should be utilized by surgeons in an effort to improve surgical mortality and patient education.

Evaluation of composite mesh for ventral hernia repair.

INTRODUCTION: Composite mesh prostheses incorporate the properties of multiple materials for ventral hernia repair. This study evaluated a polypropylene/ePTFE composite mesh with a novel internal polydioxanone (PDO) absorbable ring. METHODS: Composite mesh was placed intraperitoneally in 16 pigs through an open laparotomy and explanted at 2, 4, 8, and 12 weeks. Intraabdominal adhesions were measured laparoscopically. Host tissue in-growth was assessed histologically and tensiometrically. Degradation of the internal PDO ring component was also measured tensiometrically. Appropriate statistical tests were used, and P ≤.05 indicated significance. RESULTS: No adhesions were formed in 50% of the grafts explanted at 8 weeks and 25% of grafts explanted at 12 weeks. There were significantly more vascular structures at 8 weeks, 73.5 ± 28, compared with 2 weeks, 6.75 ± 2 (P ≤.01). The T-peel force at the mesh-host tissue interface was not significantly different among time points. The absorbable PDO ring underwent complete degradation by 12 weeks. CONCLUSIONS: This composite mesh was associated with minimal intraabdominal adhesions, progressive in-growth of host tissues, and complete degradation of a novel internal PDO ring that aided mesh positioning. This composite hernia mesh showed a favorable performance in a porcine model of open ventral hernia repair.

Colour doppler ultrasonography provides real-time microwave field visualisation in an ex vivo porcine model.

INTRODUCTION: Microwave ablation (MWA) uses non-ionising thermal energy to cause cell death by coagulative necrosis. Colour Doppler ultrasound (US) produces a spherical image during tissue ablation that appears to approximate the microwave near field (MNF) in shape and size. The aim of the present study was to determine whether colour Doppler US images observed during microwave ablation correlate with the actual thermocoagulation zone (TCZ) observed in liver tissue. METHODS: Twenty MWAs were performed in ex vivo bovine liver using a 915-MHz ablation antenna set to 45 W for 6 min concomitant with Doppler US imaging. The edges of spherical images observed with colour Doppler US were marked circumferentially in the tissue. The tissue was transected parallel to the angle of antenna insertion, and the distances between methylene blue markings and the TCZ were measured. RESULTS: The images observed using colour Doppler US were similar in size and shape to the actual TCZ observed in the tissue. The mean distance between the observed colour Doppler US field diameter and the measured TCZ was 2 ± 1 mm. CONCLUSIONS: Using colour Doppler US, the visualised field during MWA correlates with the TCZ in an ex vivo bovine liver model. Real-time, dynamic feedback of the treatment area may increase the effectiveness of MWA for liver tumours in vivo.

Verification of a prolonged untreated natural history of breast cancer by the multigene assay.

Individualization of therapy for breast cancer patients has progressed significantly over the last 5 years. A 54-year-old female went over 2 years after her diagnosis of breast cancer with no treatment. The pathologic size, however, indicated that the tumor may not have progressed from diagnosis to operation. Due to the apparent lack of progression over 2 years without treatment, a multigene assay was ordered. The recurrence score was 15, indicating a less than 10% risk of distant recurrence at 10 years. The recurrence score also falls into the "low risk" category. The prolonged natural history of this breast cancer patient suggested an indolent cancer. The "low risk" recurrence score confirmed this history and indicated that adjuvant chemotherapy is probably not beneficial to this patient.

Bile duct injury after single incision laparoscopic cholecystectomy.

BACKGROUND: The advancement and development of laparoscopic cholecystectomy revolutionized surgery and case management. Many procedures are routinely performed laparoscopically. Single incision laparoscopic surgery has been introduced with the hope of further reduction of scarring and possibly procedural pain. With no established technique for this procedure, the safety of single incision laparoscopic cholecystectomy has not been determined. METHODS AND RESULTS: A 30-year-old man underwent single incision laparoscopic cholecystectomy for symptomatic cholelithiasis at an outside hospital. The operation was uneventful, and the patient was discharged home. The patient returned to the Emergency Department 4 days postoperatively, and a bile duct injury was diagnosed. A percutaneous drain was placed, and the patient was transferred to the Hepato-Pancreato-Biliary (HPB) service of a tertiary care center for definitive care. A delayed repair approach was used to allow the inflammation around the porta to decrease. Six weeks after injury, the patient underwent Roux-en-Y hepaticojejunostomy. The patient did well postoperatively. CONCLUSION: Although single incision laparoscopic surgery will play a prominent role in the future, its development and application are not without risks as demonstrated from this case. It is imperative that surgeons better define the surgical approach to achieve the critical view and select appropriate patients for single incision laparoscopic cholecystectomy.

Post-traumatic Subserosal Small Bowel Herniation Leading to Obstruction in a Child with Acute Spinal Cord Injury.

The presentation of small bowel injury from lap belt use varies substantially, ranging from gross hemodynamic instability to insidious physiologic deterioration to simple failure of improvement. Rarely does small bowel injury manifest as an obstruction. This paper describes one such occurrence; in this case, herniation of intact mucosa/submucosa through a serosal tear caused a high-grade small bowel obstruction in a pediatric patient with an acute spinal cord injury and a virgin abdomen.

The effectiveness of grand rounds lectures in a community-based teaching hospital.

OBJECTIVE: The purpose of this study was to determine the effectiveness of weekly didactic grand rounds presentations. DESIGN: From 26 consecutive grand rounds presentations from July 2007 to March 2008, 2 questions were created from each lecture. A 52-question multiple choice test was administered 2 weeks after the completion of the last presentation. SETTING: A tertiary care institution with an accredited surgical residency program. PARTICIPANTS: Attending surgeons, residents, midlevel providers, and medical students participated in the multiple choice test. RESULTS: A total of 58 participants completed the test. The mean score was 41.5% (range, 12-69%). The senior residents had the highest mean score on the test with 51.0% (p = 0.021). With regard to global versus specific questions, there was no significant difference between the mean percentage of correct answers (41.7% vs 41.3%, respectively, p = 0.79). The great majority (76.5%) of participants indicated that they preferred to have grand rounds given by "distinguished guest speakers." The mean score on presentations by guest speakers, however, was slightly lower than for other presenters (40.7% vs 42.2%, p= 0.37). Questions from presentations by resident physicians were answered correctly significantly more often than presentations by attending surgeons (45.9% vs 39.6%, p = 0.001). Trauma and burn are considered areas of focus for this surgical residency. There was no significant difference between mean score on topics related to trauma and burn compared with other topics (40.6% vs 41.8%, p = 0.50). Attendance had very little correlation with scores on the test (correlation coefficient, 0.004). CONCLUSIONS: Approximately 40% of material presented at grand rounds was retained within a 9 month period. Although this number seems low, this information was recalled without preparation. Despite the preference for distinguished guest speakers, there was no significant additional gain in knowledge from their expertise. Presentations from senior residents were the most successful in conveying information.