Animal Models Within Surgical Simulation: A Novel Approach to the 3 Rs.

INTRODUCTION: Development of technical skills is a vital component of surgical residency. The use of animal tissues for operative simulation leads to both the loss of animal life and financial costs for the institution. We hypothesized that maximizing tissue use from investigational large animal models after euthanasia could reduce loss of animal life and institutional costs by replacing commercially purchased tissues. METHODS: After animal euthanization, a resident and medical student team harvested porcine tissue commonly used for surgical simulation: abdominal wall, kidney, heart, spleen, and small intestine. Tissues were vacuum-sealed and frozen for future educational use. Outcomes of harvest yield and time and estimated commercial pricing of harvested porcine tissues were analyzed. RESULTS: Three timed procurements were performed with decreasing operative times (36:30, 34:00, and 30:54) and increasing harvest yields (100 cm, 160 cm, and 200 cm small bowel). Procurements were conducted within 15 min of animal euthanization. Harvested tissue was considered to be of similar quality to commercially purchased tissue. Estimated cost of procured tissues from a commercial vendor was $847 compared to $109 for direct procurement from euthanized porcine models. CONCLUSIONS: Maximizing tissue use from large animal research models is an innovative approach to adhering to the three Rs of animal research: replace, reduce, and refine. Tissue procurement provides valuable tissues for resident education and simulation, increases surgical trainee operative exposure, and decreases institutional costs.

Noise in cesarean deliveries: a comprehensive analysis of noise environments in the Labor and Delivery operating room and evaluation of a visual alarm noise abatement program.

BACKGROUND: Cesarean delivery is the most common major surgery worldwide. Noise in healthcare settings leads to impaired communication and concentration, and stress among healthcare providers. Limited information is available about noise at cesarean delivery. OBJECTIVE: This study aimed to achieve a comprehensive analysis of noise that occurs during cesarean deliveries. Sound level meters are used to determine baseline noise levels and to describe the frequency of acute noise generated during a cesarean delivery that will cause a human startle response. Secondarily, we aimed to evaluate the effectiveness of a visual alarm system in mitigating excessive noise. STUDY DESIGN: We completed a preintervention/postintervention observational study of noise levels during cesarean deliveries before and after introduction of a visual alarm system for noise mitigation between February 15, 2021 and August 26, 2021. There were 156 cases included from each study period. Sound pressure levels were analyzed by overall case median decibel levels and by time epoch for relevant phases of the operation. Rapid increases in noise events capable of causing a human startle response, "startle events," were detected by retrospective analysis, with quantification for baselines and analysis of frequency by case type. Median noise levels with interquartile ranges are presented. Data are compared between epochs and case characteristics with nonparametric 2-tailed testing. RESULTS: The median acoustic pressure for all cesarean deliveries was 61.8 (58.8-65.9) (median [interquartile range]) dBA (A-weighted decibels). The median dBA for the full case time period was significantly higher in cases with neonatal intensive care unit team presence (62.1 [60.5-63.9]), admission to the neonatal intensive care unit (62.0 [60.4-63.9]), 5-minute Apgar score <7 (62.2 [61.1-64.3]), multiple gestations (62.6 [62.0-64.2]), and intraoperative tubal sterilization (62.8 [61.5-65.1]). The use of visual alarms was associated with a statistically significant reduction of median noise level by 0.7 dBA, from 61.8 (60.6-63.5) to 61.1 (59.8-63.7) dBA (P<.001). CONCLUSION: The noise intensities recorded during cesarean deliveries were commonly at levels that affect communication and concentration, and above the safe levels recommended by the World Health Organization. Although noise was reduced by 0.7 dBA, the reduction was not clinically significant in reaching a discernible amount (a 3-dB change) or in reducing "startle events." Isolated use of visual alarms during cesarean deliveries is unlikely to be a satisfactory noise mitigation strategy.

A qualitative evaluation of an operational research course for acute care trainees in Kigali, Rwanda.

INTRODUCTION: the blended SORT-IT model uses a combination of online modules and teleconferences with local and international mentors to teach operational research. We modified SORT-IT to create the Acute Care Operational Research (ACOR) course directed to anesthesiology residents in Kigali, Rwanda. This course takes students from an initial research idea through submitting a paper for publication. Our viewpoint on entering this study was that ACOR participants would have adequate resources to complete the course, but be hampered by cultural unfamiliarity with the blended teaching approach. METHODS: we conducted a qualitative analysis of the experiences of all those who participated in the ACOR course to understand obstacles and improve future course iterations. Six anesthesiology residents participated in the first iteration of the course, with 4 local mentors and 2 secondary mentors, one of whom was based at the University of Virginia, with a total of 12 participants. Semi-structured interviews were conducted with all participants and mentors, which were independently coded for topics by two reviewers. RESULTS: there was a 50% publication rate for those enrolled in the course and an expected 100% acceptance rate for those who completed the course. Some reported benefits to the course included improved research knowledge, societal improvements, and knowledge exchange. Some reported obstacles to successful course completion included time limitations, background knowledge, and communication. Of note, only 4 out of 12 participants recognized cultural barriers. CONCLUSION: although successful in the sense that all participants completed their research project, ACOR did not fully solve the main issues hindering research training. Our results show that research training in low-resource settings needs a continuing and formal focus on the factors that hinder participants´ success: mentorship and time.