Successful Use of a Cadaver Model to Teach Ultrasound-Guided Breast Procedures to Surgical Trainees.

INTRODUCTION: In academic breast surgery, ultrasound use tends to be limited to radiology departments, thus formal surgical resident training in breast ultrasound is sparse. Building on residents' ultrasound skills in our general surgery training program, we developed a novel curriculum to teach ultrasound-guided breast procedures (UGBPs), including core needle biopsy (CNB) and wire localization (WL). We hypothesized that learning UGBPs on cadavers would be preferred to learning with a breast phantom model using chicken breasts. METHODS: Residents received a 1-h lecture on breast CNB and WL followed by a 1-h hands-on laboratory session. Olives stuffed with red pimentos were used to replicate breast masses and implanted in chicken breasts and the breasts of lightly embalmed and unembalmed female cadavers. All residents practiced UGBPs with a course instructor on both models. Residents completed anonymous prelaboratory and postlaboratory surveys utilizing five-point Likert scales. RESULTS: A total of 35 trainees participated in the didactics; all completed the prelaboratory survey and 28 completed the postlaboratory survey. Participant clinical year ranged from 1 to 6. Residents' confidence in describing and performing CNBs and WLs increased significantly on postlaboratory surveys, controlling for clinical year (P < 0.001). Eighty-point seven percent preferred learning UGBPs on cadavers over phantoms most commonly citing that the cadaver was more realistic. CONCLUSIONS: Following a novel 2-h UGBP training curriculum using phantom and cadaveric models, resident confidence in describing and performing UGBPs significantly improved. Most favored the cadaveric model and reported that the course prepared them for real-life procedures.

Patient and hospital factors influence surgical approach in treatment of acute cholecystitis.

BACKGROUND: Minimally invasive (MIS) cholecystectomies have become standard due to patient and hospital advantages; however, this approach is not always achievable. Acute and gangrenous cholecystitis increase the likelihood of conversion from MIS to open cholecystectomy. This study aims to examine patient and hospital factors underlying differential utilization of MIS vs open cholecystectomies indicated for acute cholecystitis. METHODS: This is a retrospective, observational cohort study of patients with acute cholecystitis who underwent a cholecystectomy between 2016 and 2018 identified from the California Office of Statewide Health Planning and Development database. Univariate analysis and multivariable logistic regression models were used to analyze patient, geographic, and hospital variables as well as surgical approach. RESULTS: Our total cohort included 53,503 patients of which 98.4% (n = 52,673) underwent an initial minimally invasive approach and with a conversion rate of 3.3% (n = 1,759). On multivariable analysis advancing age increased the likelihood of either primary open (age 40 to < 65 aOR 2.17; ≥ 65 aOR 3.00) or conversion to open cholecystectomy (age 40 to < 65 aOR 2.20; ≥ 65 aOR 3.15). Similarly, male sex had higher odds of either primary open (aOR 1.70) or conversion to open cholecystectomy (aOR 1.84). Hospital characteristics increasing the likelihood of either primary open or conversion to open cholecystectomy included teaching hospitals (aOR 1.37 and 1.28, respectively) and safety-net hospitals (aOR 1.46 and 1.33, respectively). CONCLUSIONS: With respect to cholecystectomy, it is well-established that a minimally invasive surgical approach is associated with superior patient outcomes. Our study focused on the diagnosis of acute cholecystitis and identified increasing age as well as male sex as significant factors associated with open surgery. Teaching and safety-net hospital status were also associated with differential utilization of open, conversion-to-open, and MIS. These findings suggest the potential to create and apply strategies to further minimize open surgery in the setting of acute cholecystitis.

Improving the Safety of an Emergency Department-Based Direct Admission Process at a Children's Hospital.

OBJECTIVES: Direct admission refers to admitting a patient to a unit avoiding usual entry points such as the emergency department. Inappropriate placement of direct admissions can result in rapid response activations, codes and unanticipated pediatric intensive care unit (PICU) transfers, which correlate with higher mortality and longer lengths of stay. The objective of the project was to improve the safety of the direct admission process as evidenced by decreasing the transfer of direct admission patients to the PICU within 6 hours. METHODS: Utilizing the model for improvement, a multidisciplinary team was assembled to improve our screening process and reduce unanticipated direct admission-to-PICU transfers within 6 hours of arrival. Our emergency department-based direct admission process includes screening vital signs (temperature, heart rate, respiratory rate, blood pressure, and pulse oximetry) and a Pediatric Early Warning Score. Five Plan-Do-Study-Act cycles focused on role definition, improved documentation, referring facility and family awareness, improved visual management within the ED, and education of partner EMS and transport providers. The primary outcome was PICU transfer within 6 hours of direct admission arrival. Compliance with full screening was a process measure and number of direct admissions a balancing measure. Statistical process control charts and run charts were used to follow the measures. RESULTS: The total number of direct admissions from January 2014 to the end of data collection, June 2018, was 3070 patients. Screening protocol compliance improved from 56% to over 80% for the entire hospital. Unanticipated direct admission-to-PICU transfers decreased from a baseline of 1 every 98 patients to a special cause of 1 in 1126 patients. CONCLUSIONS: By utilizing QI methodology our team was able to implement and sustain a direct admission process that was more consistent, easier to document and improved the safety of our patients. Our study demonstrates that screening direct admissions reliably and consistently can decrease the rate of unanticipated transfer to a higher level of care.

Does surgeon-performed intraoperative wire localization allow for lower margin positivity rates compared to radiologist-performed preoperative localization in early breast cancer?

BACKGROUND: This study compares positive margin rates in breast conserving surgery (BCS) for early breast cancer using two localization techniques: surgeon-performed intraoperative ultrasound-guided wire localization (IOWL) versus radiologist-performed preoperative wire localization (POWL). METHODS: Patients with unifocal breast cancer undergoing BCS with follow-up at a single institution were retrospectively identified. Factors associated with positive margins were identified. RESULTS: 177 patients underwent IOWL (N â€‹= â€‹85) or POWL (N â€‹= â€‹92). There was a significantly lower rate of positive margins for IOWL vs. POWL (7.1 â€‹% vs. 23.9 â€‹%, p â€‹= â€‹0.002) and a corresponding lower rate of re-excision for IOWL vs. POWL (5.9 â€‹% vs. 18.5 â€‹%, p â€‹= â€‹0.011). Presence of DCIS was associated with positive margins (p â€‹= â€‹0.015). After adjusting for presence of DCIS, tumor size, and volume of tissue removed, the positive margin rate was significantly lower in the IOWL group compared to the POWL group (aOR 0.34, 95 â€‹% CI 0.13-0.93). CONCLUSIONS: In this study, adjusted analysis favored IOWL in achieving negative tumor margins. Prospective studies are needed to further explore the impact of IOWL on quality, cost-effectiveness, and patient experience.

The Creation of a Novel Low-Cost Bench-Top Kidney Transplant Surgery Simulator and a Survey on Its Fidelity and Educational Utility.

Introduction Resident inexperience during time-sensitive vascular anastomoses of a kidney transplant can negatively impact outcomes. In light of this, we created a low-cost bench-top kidney transplant surgery simulator to help residents practice vascular anastomoses. Methods We searched for inexpensive materials to design an iliac fossa and kidney allograft. Eighteen residents with real-life kidney transplant experience trialed the simulator and scored its fidelity and educational utility on a 0-100 visual analog scale (VAS) survey. Results A 35.9 x 19.4 x 12.4 cm plastic box mimicked the iliac fossa. Hooks attached to the box's sidewall held under tension 1.27 and 0.64 cm diameter Penrose drains to replicate the external iliac vein and artery. A modified kidney-shaped stress ball with 1.27 x 4, 0.64 x 4, and 0.64 x 15 cm Penrose drains replicated a kidney allograft with its vein, artery, and ureter, respectively. Residents performed and assisted in vascular anastomoses on the simulator. The iliac fossa and allograft cost $20.20 and each practice run cost $7.20. Residents thought that the simulator was less difficult than real-life procedure, had acceptable fidelity levels, and they highly rated its educational utility. Conclusion Our novel low-cost bench-top kidney transplant surgery simulator focusing on vascular anastomoses received positive educational feedback from residents.