Resident Autonomy and Performance Independence in Surgical Training Are Time- and Skill-Dependent.

INTRODUCTION: Appropriate faculty supervision and conditional independence of residents during training are required for autonomous and independent postgraduate practice. However, there is a growing concern that competence for transition to independent practice is not universally met. We hypothesize that surgery residents play a significant and active role in achieving their own independent status. METHODS: Over seven academic years (July 2014 through June 2021), 46 surgeons supervised and intraoperatively assessed the performance of 51 residents using validated Objective Structured Assessment of Technical Skill (OSATS) and Zwisch Operative Autonomy (ROA) assessments. Resident readiness to perform procedures independently (RRI) was graded as yes, no, or not applicable. Data were analyzed using descriptive statistics with categorical variables reported as frequencies and percentages. RESULTS: A total of 1657 elective procedures were performed by residents supervised by faculty. Association between RRI and postgraduate year (PGY), OSATS scores, ROA, resident and faculty gender, and case complexity was analyzed. Results indicated positive correlation between RRI and summative OSATS score (r = 0.510, P < 0.001), PGY (r = 0.535, P < 0.001) and ROA (r = 0.473, P < 0.001). Percentage of overall RRI increased from 7% at PGY1 to 87.4% at PGY5. Meaningful autonomy ratings increased from 23.6% at PGY1 to 92.5% at PGY5. Variations in ratings was observed when considering case category and complexity. CONCLUSIONS: RRI increases with years of training with variation when considering the specialty/The Accreditation Council for Graduate Medical Education procedure category and the complexity of cases. Specialty fellowships are a viable option to address the gap in The Accreditation Council for Graduate Medical Education categories when residency alone cannot reach appropriate independence. Residents' technical skills play a crucial role in evaluating RRI and granting operative autonomy.

Surgical Transgastric Necrosectomy for Necrotizing Pancreatitis: A Single-stage Procedure for Walled-off Pancreatic Necrosis.

OBJECTIVE: The aim of this study was to evaluate the role of surgical transgastric necrosectomy (TGN) for walled-off pancreatic necrosis (WON) in selected patients. BACKGROUND: WON is a common consequence of severe pancreatitis and typically occurs 3 to 5 weeks after the onset of acute pancreatitis. When symptomatic, it can require intervention. METHODS: A retrospective review of patients with WON undergoing surgical management at 3 high-volume pancreatic institutions was performed. Surgical indications, intervention timing, technical methodology, and patient outcomes were evaluated. Patients undergoing intervention <30 days were excluded. Differences across centers were evaluated using a P value of <0.05 as significant. RESULTS: One hundred seventy-eight total patients were analyzed (mean WON diameter = 14 cm, 64% male, mean age = 51 years) across 3 centers. The majority required inpatient admission with a median preoperative length of hospital stay of 29 days (25% required preoperative critical care support). Most (96%) patients underwent a TGN. The median duration of time between the onset of pancreatitis symptoms and operative intervention was 60 days. Thirty-nine percent of the necrosum was infected. Postoperative morbidity and mortality were 38% and 2%, respectively. The median postoperative length of hospital length of stay was 8 days, with the majority of patients discharged home. The median length of follow-up was 21 months, with 91% of patients having complete clinical resolution of symptoms at a median of 6 weeks. Readmission to hospital and/or a repeat intervention was also not infrequent (20%). CONCLUSION: Surgical TGN is an excellent 1-stage surgical option for symptomatic WON in a highly selected group of patients. Precise surgical technique and long-term outpatient follow-up are mandatory for optimal patient outcomes.

A Bayesian network and heuristic approach for systematic characterization of radiotherapy receipt after breast-conservation surgery.

BACKGROUND: Breast-conservation surgery with radiotherapy is a treatment highly recommended by the guidelines from the National Comprehensive Cancer Network. However, several variables influence the final receipt of radiotherapy and it might not be administered to breast cancer patients. Our objective is to propose a systematic framework to identify the clinical and non-clinical variables that influence the receipt of unexpected radiotherapy treatment by means of Bayesian networks and a proposed heuristic approach. METHODS: We used cancer registry data of Detroit, San Francisco-Oakland, and Atlanta from years 2007-2012 downloaded from the Surveillance, Epidemiology, and End Results Program. The samples had patients diagnosed with in situ and early invasive cancer with 14 clinical and non-clinical variables. Bayesian networks were fitted to the data of each region and systematically analyzed through the proposed Zoom-in heuristic. A comparative analysis with logistic regressions is also presented. RESULTS: For Detroit, patients under stage 0, grade undetermined, histology lobular carcinoma in situ, and age between 26-50 were found more likely to receive breast-conservation surgery without radiotherapy. For stages I, IIA, and IIB patients with age between 51-75, and grade II were found to be more likely to receive breast-conservation surgery with radiotherapy. For San Francisco-Oakland, patients under stage 0, grade undetermined, and age >75 are more likely to receive BCS. For stages I, IIA, and IIB patients with age >75 are more likely to receive breast-conservation surgery without radiotherapy. For Atlanta, patients under stage 0, grade undetermined, year 2011, and primary site C509 are more likely to receive breast-conservation surgery without radiotherapy. For stages I, IIA, and IIB patients in year 2011, and grade III are more likely to receive breast-conservation surgery without radiotherapy. CONCLUSION: For in situ breast cancer and early invasive breast cancer, the results are in accordance with the guidelines and very well demonstrates the usefulness of the Zoom-in heuristic in systematically characterizing a group receiving a treatment. We found a subset of the population from Detroit with ductal carcinoma in situ for which breast-conservation surgery without radiotherapy was received, but potential reasons for this treatment are still unknown.

Neuroendocrine tumors, version 1.2015.

Neuroendocrine tumors (NETs) comprise a broad family of tumors that may or may not be associated with symptoms attributable to hormonal hypersecretion. The NCCN Clinical Practice Guidelines in Oncology for Neuroendocrine Tumors discuss the diagnosis and management of both sporadic and hereditary NETs. This selection from the guidelines focuses on sporadic NETs of the pancreas, gastrointestinal tract, lung, and thymus.

Prophylactic Enoxaparin Dosing Using Anti-Factor Xa Levels in Hepatic Surgery Patients: A Pilot Study.

This study examines the safety and efficacy of using peak anti-Xa levels to achieve prophylactic enoxaparin (Lovenox, Sanofi-Aventis) levels in patients who underwent hepatic surgery. Prospectively enrolled patients undergoing major and minor hepatic procedures received postoperative enoxaparin dosing. The enoxaparin dose was adjusted to attain a peak anti-Xa level ≥ 0.20 U/ml. This group was compared to a historical cohort of patients who underwent similar procedures and received standard postoperative VTE chemoprophylaxis dosing. Inpatient postoperative VTE rates were higher in the control group when compared to the experimental group (0 patients [0.00%] vs 4 patients [8.16%]; P = .035). There was no statistically significant difference in number of postoperative blood transfusions, discharge hemoglobin, or in-hospital bleeding events. Adjusting enoxaparin dosing to achieve prophylactic peak anti-Xa levels of ≥0.20 IU/ml was associated with a reduced incidence of symptomatic inpatient postoperative VTE in patients who underwent hepatic surgery without increasing postoperative bleeding events.

The Plan-Do-Study-Act (PDSA): An Iterative Approach to Optimize Residents Performance in the American Board of Surgery in-Training Exam (ABSITE).

INTRODUCTION: American Board of Surgery (ABS) In-Training Examination (ITE), or ABSITE, preparation requires an effective study approach. In 2014, the ABS announced the alignment of ABSITE to the SCORE® Curriculum. We hypothesized that implementing a Plan-Do-Study-Act (PDSA) approach would help surgery residents improve their performance on the ABSITE. METHOD: Over 20 years, in a single institution, residents' ABSITE performance was evaluated over 3 timeframes: Time A (2004-2013), no specific curriculum; Time B (2014-2019), an annual comprehensive ABSITE-simulated SCORE®-based multiple-choice exam (MCQ) was administered; and Time C (2020-2023), like Time B with the addition of the PDSA approach for those with less than 60% correct on the ABSITE-simulated SCORE®-based exam. At the beginning of the academic year, in July, all residents are encouraged to (1) initiate a study plan for the upcoming ABSITE using SCORE® guided by the published ABSITE outlines content topics (Plan), (2) take an ABSITE-simulated SCORE®-based exam in October (Do), (3) assess the results/scores (Study), and (4) identify appropriate next steps (Act). Correlational analysis was performed to evaluate the association between ABSITE scores and ABSITE-simulated SCORE®-based exam scores in Time B and Time C. The primary outcome was the change in the proportions of ABSITE scores <30th percentile. RESULTS: A total of 294 ABSITE scores of 94 residents (34 females and 60 males) were analyzed. We found stronger correlation between the correct percentage on ABSITE and ABSITE-simulated SCORE®-based exam scores in Time C (r = 0.73, p < 0.0001) compared to Time B (0.62, p < 0.0001). The percentage of residents with ABSITE scores lower than 30th percentile dropped significantly from 14.0% to 3.7% (p = 0.016). CONCLUSION: Implementing the Plan-Do-Study-Act (PDSA) approach using the SCORE® curriculum significantly enhances residents' performance on the ABSITE exam. Surgery residents are encouraged to use this approach and to utilize the SCORE-contents outlined by the ABS in their study plan.

Do Surgery Residents Prepare Enough for Surgical Cases?

IMPORTANCE: This study aimed to identify both modifiable and nonmodifiable factors that affect intraoperative-specific surgical education and performance, with an overall goal of increasing cognizance of such factors to improve surgical training. OBJECTIVE: To determine whether surgery residents prepare adequately for participation in surgical cases and to examine specific variables that affect resident preparation. DESIGN: This study is a retrospective survey-based study that included data from 1945 postoperative case evaluations completed by 59 different general surgery residents over a period of 8 years (2014-2022). SETTING: A Midwestern medical school's general surgery residency program. PARTICIPANTS: Fifty-nine general surgery residents at Western Michigan University's medical school; 50 attending surgeons and faculty with whom residents regularly operate. The sample was comprised of residents and attendings who voluntarily filled out postoperative performance surveys after elective cases. RESULTS: This retrospective survey-based study included postoperative evaluation data from 1945 procedures performed by 59 different residents and 50 attendings. Participants included 36 male residents, 23 female residents, 39 male attendings, and 11 female attendings. All included data were for elective cases. Self-reported preoperative communication was worst at the PGY1 level with positive correlation of improvement yearly (r = 0.30, p < 0.001). Positive correlation was seen between overall preparedness and case complexity (r = 0.25, p < 0.001). Positive correlation was seen between case complexity and resident perception of intraoperative teaching quality (r = 0.53, p < 0.001). Preoperative communication initiated by residents was significantly worse when the attending surgeon was female, regardless of resident gender (p < 0.001); this effect was particularly profound with male residents. Male residents overall rated themselves as more prepared compared to their female counterparts (11.13 ± 1.96 vs. 10.84 ± 2.03, p = 0.003). CONCLUSIONS AND RELEVANCE: There is a need to identify and address quantifiable gaps in communication between residents and faculty to optimize surgical education; one of the first steps is characterizing nonmodifiable factors that correlate with differences in pre-operative communication and case preparation.

Sequential preoperative hepatic vein embolization after portal vein embolization for extended left hepatectomy in colorectal liver metastases.

BACKGROUND: The role of portal vein embolization to increase future liver remnant (FLR) is well-established in the treatment of colorectal liver metastases. However, the role of hepatic vein embolization is unclear. CASE REPORT: A patient with colorectal liver metastases received neoadjuvant chemotherapy prior to attempted resection. At the time of resection his tumor appeared to invade the left and middle hepatic vein, requiring an extended left hepatectomy including segments five and eight. Post-operatively, he underwent sequential left portal vein embolization followed by left hepatic vein embolization and finally, middle hepatic vein embolization. Hepatic vein embolization was performed to increase the FLR as well as to allow collateral drainage of the FLR to develop. A left trisectionectomy was then performed and no evidence of postoperative liver congestion or morbidity was found. CONCLUSION: Sequential portal vein embolization and hepatic vein embolization for extended left hepatectomy may be considered to increase FLR and may prevent right hepatic congestion after sacrificing the middle vein.

Disparities in the surgical treatment of colorectal liver metastases.

BACKGROUND: Hepatectomy is an accepted standard of care for patients with resectable colorectal liver metastases (CLM). Given that it is unclear whether disparities exist between different patient populations, a population-based analysis was performed to analyze this issue with regards to resection rates and surgical mortality in patients with CLM. METHODS: Using the Nationwide Inpatient Sample, characteristics and outcomes of adult patients with a diagnosis of colorectal cancer and colorectal metastases that subsequently underwent a liver resection during the years 1993-2007 were identified. Multivariate analysis was used to determine the effects of demographic and clinical covariables on resection rates and in-hospital mortality. RESULTS: Incident colorectal and liver metastases were identified in 138,565 patients; 3,528 patients (2.6%) underwent subsequent resection. African American and Hispanic race were associated with lower resection rates compared to Caucasian patients (adjusted OR 0.61 (0.52 - 0.71) and 0.81 (0.68 - 0.96) respectively). Medicaid insurance was associated with decreased resection rates compared to private insurance (AOR 0.47 (0.40 - 0.56)). The overall inpatient mortality rate was 3.1%. Multivariate analysis determined that mortality rate was correlated to both insurance status and geographic region. CONCLUSIONS: The national resection rate is significantly lower than has been reported by most case series. Race and insurance status appear to be correlated to the likelihood of surgical resection. In-hospital mortality is equivalent to the rates reported elsewhere, but is correlated to insurance status and region.

Safety and Efficacy of Prophylactic Enoxaparin Adjusted by Anti-Factor Xa Peak Levels in Pancreatic Surgery.

BACKGROUND: Recommended prophylactic doses of enoxaparin (Lovenox) are associated with subprophylactic anti-Factor Xa (anti-Xa) levels. This study examines the safety and efficacy of anti-Xa-guided dosing of enoxaparin in pancreatic surgery. METHODS: Prospectively enrolled patients undergoing pancreatic surgery received enoxaparin dosing adjusted based on peak anti-Xa levels and were compared to a historical cohort of patients. RESULTS: Baseline characteristics were similar between the intervention and control groups. In the intervention group, 73.9% initially had subprophylactic peak anti-Xa levels. There were no differences in the venous thromboembolism (VTE) rates between the intervention and control groups (0% vs. 7.69%; P = .084), major bleeding events (4.35% vs. 2.56%; P = .627), RBC transfusion (15.2% vs. 25.6%; P = .257), or Hgb on discharge (9.82 vs. 9.44 g/dL; P = .244). Subtherapeutic anti-Xa levels were correlated with a higher BMI (P = .033), longer OR time (P = .011), and length of stay (P = .018). CONCLUSIONS: Enoxaparin 40 mg once daily is associated with subprophylactic peak anti-Xa levels. Dose adjustment based on anti-Xa levels trended toward a lower rate of in-hospital VTE without an increase in bleeding or transfusion requirement.