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1.
BMC Med Educ ; 24(1): 547, 2024 May 16.
Article in English | MEDLINE | ID: mdl-38755653

ABSTRACT

INTRODUCTION: Non-technical skills (NTS) including communication, teamwork, leadership, situational awareness, and decision making, are essential for enhancing surgical safety. Often perceived as tangential soft skills, NTS are many times not included in formal medical education curricula or continuing medical professional development. We aimed to explore exposure of interprofessional teams in North-Central Nigeria to NTS and ascertain perceived facilitators and barriers to interprofessional training in these skills to enhance surgical safety and inform design of a relevant contextualized curriculum. METHODS: Six health facilities characterised by high surgical volumes in Nigeria's North-Central geopolitical zone were purposively identified. Federal, state, and private university teaching hospitals, non-teaching public and private hospitals, and a not-for-profit health facility were included. A nineteen-item, web-based, cross-sectional survey was distributed to 71 surgical providers, operating room nurses, and anaesthesia providers by snowball sampling through interprofessional surgical team leads from August to November 2021. Data were analysed using Fisher's exact test, proportions, and constant comparative methods for free text responses. RESULTS: Respondents included 17 anaesthesia providers, 21 perioperative nurses, and 29 surgeons and surgical trainees, with a 95.7% survey completion rate. Over 96% had never heard of any NTS for surgery framework useful for variable resource contexts and only 8% had ever received any form of NTS training. Interprofessional teams identified communication and teamwork as the most deficient personal skills (38, 57%), and as the most needed for surgical team improvement (45, 67%). There was a very high demand for NTS training by all surgical team members (64, 96%). The main motivations for training were expectations of resultant improved patient safety and improved interprofessional team dynamics. Week-long, hybrid training courses (with combined in-person and online components) were the preferred format for delivery of NTS education. Factors that would facilitate attendance included a desire for patient safety and self-improvement, while barriers to attendance were conflicts of time, and training costs. CONCLUSIONS: Interprofessional surgical teams in the Nigerian context have a high degree of interest in NTS training, and believe it can improve team dynamics, personal performance, and ultimately patient safety. Implementation of NTS training programs should emphasize interprofessional communication and teamworking.


Subject(s)
Interprofessional Relations , Patient Care Team , Humans , Cross-Sectional Studies , Nigeria , Male , Communication , Leadership , Female , Curriculum , Adult , Surveys and Questionnaires , Clinical Competence
2.
Med Sci Educ ; 34(1): 237-256, 2024 Feb.
Article in English | MEDLINE | ID: mdl-38510415

ABSTRACT

Much surgery in sub-Saharan Africa is provided by non-specialists who lack postgraduate surgical training. These can benefit from simulation-based learning (SBL) for essential surgery. Whilst SBL in high-income contexts, and for training surgical specialists, has been explored, SBL for surgical training during undergraduate medical education needs to be better defined. From 26 studies, we identify gaps in application of simulation to African undergraduate surgical education, including lack of published SBL for most (65%) World Bank-defined essential operations. Most SBL is recent (2017-2021), unsustained, occurs in Eastern Africa (78%), and can be enriched by improving content, participant spread, and collaborations.

3.
BMC Psychiatry ; 23(1): 327, 2023 05 10.
Article in English | MEDLINE | ID: mdl-37165333

ABSTRACT

BACKGROUND: Electroconvulsive therapy (ECT) is a procedural treatment that is potentially life-saving for some patients with severe psychiatric illness. At the start of the global coronavirus disease 2019 (COVID-19) pandemic, ECT practice was remarkably disrupted, putting vulnerable individuals at increased risk of symptom exacerbation and death by suicide. This study aimed to capture the self-reported experiences of psychiatrists based at healthcare facilities across Canadian provinces who were delivering ECT treatments during the first phase of the COVID-19 pandemic (i.e., from mid-March 2020 to mid-May 2020). METHODS: A multidisciplinary team of experts developed a survey focusing on five domains: ECT unit operations, decision-making, hospital resources, ECT procedure, and mitigating patient impact. Responses were collected from psychiatrists providing ECT at 67 ECT centres in Canada, grouped by four geographical regions (Ontario, Quebec, Atlantic Canada, and Western Canada). RESULTS: Clinical operations of ECT programs were disrupted across all four regions - however, centres in Atlantic Canada were able to best preserve outpatient and maintenance care, while centres in Western Canada were able to best preserve inpatient and acute care. Similarly, Atlantic and Western Canada demonstrated the best decision-making practices of involving the ECT team and clinical ethicists in the development of pandemic-related guidelines. Across all four regions, ECT practice was affected by the redeployment of professionals, the shortage of personal protective equipment, and the need to enforce social distancing. Attempts to introduce modifications to the ECT delivery room and minimize bag-valve-mask ventilation were consistently reported. All four regions developed a new patient prioritization framework, and Western Canada, notably, aimed to provide ECT to only the most severe cases. CONCLUSIONS: The results suggest that ECT provision was disproportionately affected across different parts of Canada. Possible factors that could explain these interregional differences include population, distribution of urban vs. rural areas, pre-pandemic barriers in access to ECT, number of cases, ability to control the spread of infection, and the general reduction in physicians' activities across different areas of health care. Studying these factors in the future will inform how medical centres should respond to public health emergencies and pandemic-related circumstances in the context of procedural treatments.


Subject(s)
COVID-19 , Electroconvulsive Therapy , Mental Disorders , Humans , COVID-19/epidemiology , Pandemics/prevention & control , Electroconvulsive Therapy/methods , Mental Disorders/therapy , Ontario
5.
J Surg Educ ; 80(6): 817-825, 2023 06.
Article in English | MEDLINE | ID: mdl-36973156

ABSTRACT

OBJECTIVE: Improvements to the medical student surgical learning environment are limited by lack of granular data and recall bias on end-of-clerkship evaluations. The purpose of this study was to identify specific areas for intervention using a novel real-time mobile application. DESIGN: An application was designed to obtain real-time feedback from medical students regarding the learning environment on their surgical clerkship. Thematic analysis of student experiences was performed at the conclusion of 4 consecutive 12-week rotation blocks. SETTING: Brigham and Women's Hospital/Harvard Medical School, Boston, Massachusetts. RESULTS: Fifty-four medical students at a single institution were asked to participate during their primary clerkship experience. Students submitted 365 responses over 48 weeks. Multiple themes emerged which were dichotomized into positive and negative emotions centered on specific student priorities. Approximately half of responses were associated with positive emotions (52.9%) and half with negative emotions (47.1%). Student priorities included the desire to feel included in the surgical team (resulting in feeling engaged/ignored), to have a positive relationship with members of the team (perceiving kind/rude interactions), to witness compassionate patient care (observing empathy/disrespect for patients), to have a well-planned surgical rotation (experiencing organization/disorganization within teams), and to feel that student well-being is prioritized (reporting opportunities/disregard for student wellness). CONCLUSION: A novel, user-friendly mobile application identified several areas to improve the experience and engagement of students on their surgery clerkship. Allowing clerkship directors and other educational leaders to collect longitudinal data in real time may allow for more targeted, timely improvements to the medical student surgical learning environment.


Subject(s)
Mobile Applications , Students, Medical , Female , Humans , Clinical Clerkship/methods , Education, Medical, Undergraduate/methods , Feedback , Students, Medical/psychology , General Surgery/education
6.
Hum Factors ; 65(6): 1221-1234, 2023 09.
Article in English | MEDLINE | ID: mdl-35430922

ABSTRACT

OBJECTIVE: Our primary aim was to investigate crew performance during medical emergencies with and without ground-support from a flight surgeon located at mission control. BACKGROUND: There are gaps in knowledge regarding the potential for unanticipated in-flight medical events to affect crew health and capacity, and potentially compromise mission success. Additionally, ground support may be impaired or periodically absent during long duration missions. METHOD: We reviewed video recordings of 16 three-person flight crews each managing four unique medical events in a fully immersive spacecraft simulator. Crews were randomized to two conditions: with and without telemedical flight surgeon (FS) support. We assessed differences in technical performance, behavioral skills, and cognitive load between groups. RESULTS: Crews with FS support performed better clinically, were rated higher on technical skills, and completed more clinical tasks from the medical checklists than crews without FS support. Crews with FS support also had better behavioral/non-technical skills (information exchange) and reported significantly lower cognitive demand during the medical event scenarios on the NASA-TLX scale, particularly in mental demand and temporal demand. There was no significant difference between groups in time to treat or in objective measures of cognitive demand derived from heart rate variability and electroencephalography. CONCLUSION: Medical checklists are necessary but not sufficient to support high levels of autonomous crew performance in the absence of real-time flight surgeon support. APPLICATION: Potential applications of this research include developing ground-based and in-flight training countermeasures; informing policy regarding autonomous spaceflight, and design of autonomous clinical decision support systems.


Subject(s)
Aerospace Medicine , Space Flight , Humans , Aerospace Medicine/methods , Astronauts/psychology , Time Factors , Simulation Training , Space Simulation , Random Allocation , Emergencies
8.
J Obstet Gynaecol India ; 72(4): 314-321, 2022 Aug.
Article in English | MEDLINE | ID: mdl-35923508

ABSTRACT

Background: Consanguineous marriage (CM) has been linked to spontaneous abortion (SAB), although studies have largely been cross-sectional and likely underestimated early loss. We aimed to determine the relationships between CM and SAB in a prospective pregnancy cohort study in Telangana State, India. Methods: Data from 661 participants aged 15-35 years in the Longitudinal Indian Family hEalth (LIFE) study actively followed for pregnancy and pregnancy loss were analyzed. SAB was classified as early (< 8) or late (8-22) weeks gestation. We used logistic regression to model the relationships between CM, defined by first-cousin marriage, and SAB, adjusted for maternal age. Results: Women in CM were at a modestly increased risk of any (ORadj 1.15, 95% CI 0.69, 1.91) and early (ORadj 2.03, 95% CI 0.85, 4.83) SAB compared to women in non-CM, although results were not statistically significant. There was no relationship between CM and late SAB. Conclusion: Among couples in southern India, there was a modest increase in early but not late SAB among CMs which may be explained by the expected influence of chromosomal abnormalities and lethal homozygous recessive disease on early loss. Pre- and Peri-marital Health Counseling that addresses this risk may be warranted. Supplementary Information: The online version contains supplementary material available at 10.1007/s13224-021-01498-7.

9.
Open Forum Infect Dis ; 9(4): ofac045, 2022 Apr.
Article in English | MEDLINE | ID: mdl-35355893

ABSTRACT

Background: Ocular candidiasis is a known complication of candidemia. Given the poor ocular penetration of echinocandins, there is some concern that the increasing use of echinocandins may portend an increased incidence of ophthalmic complications. We examined the changing trends in antifungal prescribing patterns and the incidence of ophthalmic complications after candidemia. Methods: Patients with blood cultures positive for Candida species between January 2014 and June 2020 who underwent screening fundoscopic examination by an ophthalmologist were analyzed. The χ2 analysis was used to compare antifungal prescriptions and ocular exam findings before and after 2016. Trend analysis was also performed to assess temporal changes in prescribing practices and eye exam findings. Results: There were 226 candidemia cases during the study period, 129 (57.1%) of which underwent screening eye exams. From 2014 to 2015, 24 of 37 (64.5%) patients received eye-penetrating antifungals compared to 36 of 92 (39.1%) from 2016 to 2020 (P = .008). Overall, 30 of 129 (23.3%) patients had abnormal eye exams with the prevalence of abnormal findings being 7 of 37 (18.9%) before 2016 compared to 23 of 92 (25%, P = .46) thereafter. A trend analysis revealed an increase in abnormal eye findings over the study period (P = .008). Of the 30 patients who had abnormal eye exams, 9 (30%) had a change in systemic antifungal therapy from echinocandins to eye-penetrating antifungals. Echinocandin use was associated with abnormal eye findings. Conclusions: Prescription of eye-penetrating antifungals for candidemia has trended down since 2016. This was associated with a concomitant increase in abnormal findings on screening fundoscopy. Abnormal eye exams were not uncommon throughout our study period.

10.
Ann Surg Open ; 3(1): e133, 2022 Mar.
Article in English | MEDLINE | ID: mdl-37600100

ABSTRACT

Objective: The aims of this study were to describe the process of integrating 2 established training programs, Nontechnical skills for surgeons, and a traditional essential surgical skills course and to measure the impact of this integrated course on the behaviors of interprofessional surgical teams in Rwandan district hospitals. Background: Surgical errors and resulting adverse events are due to variability in both technical and nontechnical surgical skills. Providing technical and nontechnical skills training to the perioperative team may enhance the learning of both of these skills and promote safe intraoperative patient care. Methods: A quality improvement framework guided the process of integrating essential surgical skills and nontechnical skills into a single training program for surgical teams. The resulting 2-day training program was delivered to 68-person teams from 17 hospitals. Nontechnical skills for surgeons was taught through didactics and in the operating room, where preoperative briefing, intraoperative interactions, and postoperative debriefing were used as essential and nontechnical skills teaching moments. Postcourse surveys, follow-up interviews, focus groups, and direct observation of participants in the operating room were conducted to assess how participants implemented the knowledge and skills from the training into practice. Results: Ninety-seven percent of the participants reported that they were satisfied with the course. Follow-up participant interviews and focus groups reported that the course helped them to improve their preoperative planning, intraoperative communication, decision-making, and postoperative debriefing. Conclusions: It is possible to implement an integrated essential surgical skills and nontechnical skills training course. Integrating nontechnical skills into essential surgical skills courses may enhance learning of these skills.

11.
J ECT ; 38(1): 52-59, 2022 03 01.
Article in English | MEDLINE | ID: mdl-34519681

ABSTRACT

OBJECTIVES: The COVID-19 pandemic has disrupted the provision of essential and potentially life-saving procedural treatments such as electroconvulsive therapy (ECT). We surveyed ECT providers across Canada to understand how the first wave of the pandemic affected ECT delivery between mid-March 2020 and mid-May 2020. METHODS: The survey was administered to ECT team members and decision makers at 107 Canadian health care centers with a focus on 5 domains: operations, decision-making, hospital resources, ECT procedure, and patient impact. Responses were obtained from 72 institutions, and collected answers were used to derive representative responses reflecting the situation at each ECT center. For specific domains, responses were split into 2 databases representing the perspective of psychiatrists (n = 67 centers) and anesthesiologists (n = 24 centers). RESULTS: Provision of ECT decreased in 64% centers and was completely suspended in 27% of centers after the onset of the pandemic. Outpatient and maintenance ECT were more affected than inpatient and acute ECT. Programs reported a high level of collaboration between psychiatry and hospital leadership (59%) but a limited input from clinical ethicists (18%). Decisions were mostly made ad hoc leading to variability across institutions in adopted resource allocation, physical location of ECT delivery, and triaging frameworks. The majority of centers considered ECT to be aerosol-generating and incorporated changes to airway management. CONCLUSIONS: Electroconvulsive therapy services in Canada were markedly disrupted by the COVID-19 pandemic. The variability in decision-making across centers warrants the development of a rational approach toward offering ECT in pandemic contexts.


Subject(s)
COVID-19 , Electroconvulsive Therapy , Canada , Electroconvulsive Therapy/methods , Humans , Pandemics , SARS-CoV-2 , Surveys and Questionnaires
12.
Animals (Basel) ; 11(9)2021 Aug 27.
Article in English | MEDLINE | ID: mdl-34573482

ABSTRACT

Calf housing is naturally thermodynamic, with interactions between various elements such as wind speed, air temperature, and humidity. This study investigated the effect of the proportion of time for which calves were exposed to effective environmental temperatures below their lower critical temperature (LCT) on their daily liveweight gain (DLWG) within their first month of life. This study used the naturally occurring climatic environment, whereas other such studies have been conducted under climatically controlled conditions. Air temperature (°C), relative humidity (%), and wind speed (m/s) were recorded within the calf housing from birth until approximately 28 days of age, with calves being health-scored and weighed at regular intervals. Calves were housed from birth until 6-14 days old in individual hutches, and then moved into group housing igloo pens. Whilst individually housed, calves that spent less than 32% of their time below their LCT had a DLWG of 0.06 ± 0.34 kg/d (mean ± SE) compared to calves that spent more than 97% of their time below their LCT, which had a DLWG of -0.19 ± 0.045 kg/d. When group housed, calves that spent less than 1% of their time below their LCT had a DLWG of 0.59 ± 0.18 kg/d, whereas calves that spent more than 28% of their time below their LCT had a DLWG of 0.53 ± 0.23 kg/d. The proportion of time for which calves were exposed to effective environmental temperatures below their LCT had a significant effect on DLWG when calves were individually housed. Therefore, exposure to effective environmental temperatures below the LCT can be detrimental to the growth of the calf in the early stages of its life.

13.
Animals (Basel) ; 11(7)2021 Jun 30.
Article in English | MEDLINE | ID: mdl-34208877

ABSTRACT

The first few months of life are of great importance to the longevity and lifetime performance of dairy cows. The nutrition, environment and healthcare management of heifer calves must be sufficient to minimise exposure to stress and disease and enable them to perform to their genetic potential. Lack of reporting of farm management practices in Northern Ireland (NI) makes it difficult to understand where issues impacting health, welfare and performance may occur in the rearing process. The objective of this study was to investigate housing design and management practices of calves on 66 dairy farms across NI over a 3-month period and also identify areas that may cause high risk of poor health and performance in dairy calves. An initial survey was used to detail housing and management practices, with two subsequent visits to each farm used to collect animal and housing-based measurements linked to hygiene management, animal health and performance. Large variations in key elements such as weaning criteria and method, calf grouping method used, nutritional feed plane, and routine hygiene management were identified. The specification of housing, in particular ventilation and stocking density, was highlighted as a potential limiting factor for calf health and performance. Lack of measurement of nutritional inputs, hygiene management practices and calf performance was observed. This poses a risk to farmers' ability to ensure the effectiveness of key management strategies and recognise poor calf performance and health.

14.
Ann Rheum Dis ; 80(6): 748-757, 2021 06.
Article in English | MEDLINE | ID: mdl-33692019

ABSTRACT

OBJECTIVES: Circulating myeloid precursors are responsible for post-natal osteoclast (OC) differentiation and skeletal health, although the exact human precursors have not been defined. Enhanced osteoclastogenesis contributes to joint destruction in rheumatoid arthritis (RA) and tumour necrosis factor (TNF) is a well-known pro-osteoclastogenic factor. Herein, we investigated the interplay between receptor activator of nuclear factor kappa-Β ligand (RANK-L), indispensable for fusion of myeloid precursors and the normal development of OCs, and TNF in directing the differentiation of diverse pre-OC populations derived from human peripheral blood. METHODS: Flow cytometric cell sorting and analysis was used to assess the potential of myeloid populations to differentiate into OCs. Transcriptomic, epigenetic analysis, receptor expression and inhibitor experiments were used to unravel RANK-L and TNF signalling hierarchy. RESULTS: TNF can act as a critical homoeostatic regulator of CD14+ monocyte (MO) differentiation into OCs by inhibiting osteoclastogenesis to favour macrophage development. In contrast, a distinct previously unidentified CD14-CD16-CD11c+ myeloid pre-OC population was exempt from this negative regulation. In healthy CD14+ MOs, TNF drove epigenetic modification of the RANK promoter via a TNFR1-IKKß-dependent pathway and halted osteoclastogenesis. In a subset of patients with RA, CD14+ MOs exhibited an altered epigenetic state that resulted in dysregulated TNF-mediated OC homoeostasis. CONCLUSIONS: These findings fundamentally re-define the relationship between RANK-L and TNF. Moreover, they have identified a novel pool of human circulating non-MO OC precursors that unlike MOs are epigenetically preconditioned to ignore TNF-mediated signalling. In RA, this epigenetic preconditioning occurs in the MO compartment providing a pathological consequence of failure of this pathway.


Subject(s)
Arthritis, Rheumatoid , Osteoclasts , Arthritis, Rheumatoid/pathology , Cell Differentiation/genetics , Homeostasis , Humans , Osteoclasts/pathology , Osteogenesis , RANK Ligand/metabolism , Tumor Necrosis Factor-alpha
16.
Am J Surg ; 222(2): 334-340, 2021 08.
Article in English | MEDLINE | ID: mdl-33388134

ABSTRACT

BACKGROUND: Resident evaluation of faculty teaching is an important metric in general surgery training, however considerable variability in faculty teaching evaluation (FE) instruments exists. STUDY DESIGN: Twenty-two general surgery programs provided their FE and program demographics. Three clinical education experts performed blinded assessment of FEs, assessing adherence 2018 ACGME common program standards and if the FE was meaningful. RESULTS: Number of questions per FE ranged from 1 to 29. The expert assessments demonstrated that no evaluation addressed all 5 ACGME standards. There were significant differences in the FEs effectiveness of assessing the 5 ACGME standards (p < 0.001), with teaching abilities and professionalism rated the highest and scholarly activities the lowest. CONCLUSION: There was wide variation between programs regarding FEs development and adhered to ACGME standards. Faculty evaluation tools consistently built around all suggested ACGME standards may allow for a more accurate and useful assessment of faculty teaching abilities to target professional development.


Subject(s)
Faculty, Medical , General Surgery/education , Internship and Residency , Professional Competence , Accreditation , Humans , Program Evaluation
18.
Perspect Psychol Sci ; 16(1): 175-187, 2021 01.
Article in English | MEDLINE | ID: mdl-33301692

ABSTRACT

In the battle for control of coronavirus disease-19 (COVID-19), we have few weapons. Yet contact tracing is among the most powerful. Contact tracing is the process by which public-health officials identify people, or contacts, who have been exposed to a person infected with a pathogen or another hazard. For all its power, though, contact tracing yields a variable level of success. One reason is that contact tracing's ability to break the chain of transmission is only as effective as the proportion of contacts who are actually traced. In part, this proportion turns on the quality of the information that infected people provide, which makes human memory a crucial part of the efficacy of contact tracing. Yet the fallibilities of memory, and the challenges associated with gathering reliable information from memory, have been grossly underestimated by those charged with gathering it. We review the research on witnesses and investigative interviewing, identifying interrelated challenges that parallel those in contact tracing, as well as approaches for addressing those challenges.


Subject(s)
COVID-19/diagnosis , Contact Tracing/methods , Memory , Public Health/methods , Humans , SARS-CoV-2
19.
Rheumatology (Oxford) ; 60(3): 1533-1542, 2021 03 02.
Article in English | MEDLINE | ID: mdl-33123735

ABSTRACT

OBJECTIVES: Immune dysregulation contributes to the development of RA. Altered surface expression patterns of integrin adhesion receptors by immune cells is one mechanism by which this may occur. We investigated the role of ß2 integrin subunits CD11a and CD11b in dendritic cell (DC) subsets of RA patients. METHODS: Total ß2 integrin subunit expression and its conformation ('active' vs 'inactive' state) were quantified in DC subsets from peripheral blood (PB) and SF of RA patients as well as PB from healthy controls. Ex vivo stimulation of PB DC subsets and in vitro-generated mature and tolerogenic monocyte-derived DCs (moDCs) were utilized to model the clinical findings. Integrin subunit contribution to DC function was tested by analysing clustering and adhesion, and in co-cultures to assess T cell activation. RESULTS: A significant reduction in total and active CD11a expression in DCs in RA SF compared with PB and, conversely, a significant increase in CD11b expression was found. These findings were modelled in vitro using moDCs: tolerogenic moDCs showed higher expression of active CD11a and reduced levels of active CD11b compared with mature moDCs. Finally, blockade of CD11b impaired T cell activation in DC-T cell co-cultures. CONCLUSION: For the first time in RA, we show opposing expression of CD11a and CD11b in DCs in environments of inflammation (CD11alow/CD11bhigh) and steady state/tolerance (CD11ahigh/CD11blow), as well as a T cell stimulatory role for CD11b. These findings highlight DC integrins as potential novel targets for intervention in RA.


Subject(s)
Arthritis, Rheumatoid/metabolism , Dendritic Cells/metabolism , Integrins/metabolism , Joints/metabolism , Arthritis, Rheumatoid/pathology , CD11a Antigen/metabolism , CD11b Antigen/metabolism , Flow Cytometry , Humans , Inflammation/metabolism , Joints/pathology , T-Lymphocytes/metabolism
20.
Adv Med Educ Pract ; 11: 969-976, 2020.
Article in English | MEDLINE | ID: mdl-33376436

ABSTRACT

PURPOSE: Medical school simulations are often designed for a limited number of students to maximize engagement and learning. To ensure that all first-year medical students who wished to join had an opportunity to participate, we designed a novel method for larger groups. PATIENTS AND METHODS: We devised a low technology "Orchestra Leader's" chart approach to prominently display students' roles, chosen by lottery. During simulation, the chart was mounted on an intravenous pole and served as a group organizational tool. A course instructor prompted students using the chart to accomplish the course objectives in a logical order. Real-life cardiologists and gastroenterologists provided the students with expert subspecialty consultation. We analyzed 125 anonymous student evaluation ratings for 3 years (2017-2019) with a range of 8 to 19 students per laboratory session. RESULTS: Our 2017-2019 larger group sessions were all rated as excellent (1.26, Mean, SD ±.510) on the Likert scale where 1.0 is excellent and 5.0 is poor. There were no statistically significant differences in overall ratings among the 2017, 2018 and 2019 sessions. The subspecialists were uniformly rated as excellent. Verbatim free-text responses demonstrated resounding student appreciation for the role assignment by lottery method. CONCLUSION: We designed a novel, "Orchestra Leader's" chart approach for accommodating larger groups in a multidisciplinary simulation laboratory using role assignment by lottery, roles depicted on an organizational chart, and expert instructor prompting. Our consistently excellent ratings suggest that our methods are useful for achieving well-rated larger group simulation laboratories.

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