BACKGROUND Learning from medical errors and near-misses based on retrospective, single-case outcomes is an ubiquitous part of medical training, so much so that morbidity and mortality (M&M) conferences are a required component of graduate medical education in the United States and have been since 1983. 1 Despite widespread use of the M&M conference, its format remains heterogenous with significant variation between programs. 1,2 The origin of the M&M conference can be traced to the early 20th century when Ernest Codman, a surgeon and outspoken reformer at Massachusetts General Hospital, introduced the end-results system, which employed end-result cards to publicly document individual surgeon's outcomes. 2 While this system of blame assignment was met with intense opposition at the time, it largely informed the initial iteration of the M&M conference. 2 Despite over a century of shared experience with M&M conferences among medical centers, many of the limitations of the primitive M&M conference still exist today. These include haphazard retrospective collection of data, focus on isolated and anecdotal events without consideration of previous similar events, recall bias, lack of meaningful audit, narrow focus on individual performance, lack of systems-based thinking, and lack of

Introduction: Traditional simulation debriefing is both time-and resource-intensive. Shifting the degree of primary learning responsibility from the faculty to the learner through self-guided learning has received greater attention as a means of reducing this resource intensity. The aim of the study was to determine if video-assisted self-debriefing, as a form of self-guided learning, would have equivalent learning outcomes compared to standard debriefing.Methods: This randomized cohort study consisting of 49 PGY-1 to -3 emergency medicine residents compared performance after video self-assessment utilizing an observer checklist versus standard debriefing for simulated emergency department procedural sedation (EDPS). The primary outcome measure was performance on the second EDPS scenario.Results: Independent-samples t-test found that both control (standard debrief) and intervention (video selfassessment) groups demonstrated significantly increased scores on Scenario 2 (standard-t(40) = 2.20, p < 0.05; video-t(45) = 3.88, p < 0.05). There was a large and significant positive correlation between faculty and resident self-evaluation (r = 0.70, p < 0.05). There was no significant difference between faculty and residents selfassessment mean scores (t(24) = 1.90, p = 0.07). Conclusions:Residents receiving feedback on their performance via video-assisted self-debriefing improved their performance in simulated EDPS to the same degree as with standard faculty debriefing. Video-assisted selfdebriefing is a promising avenue for leveraging the benefits of simulation-based training with reduced resource requirements. P rocedural sedation is a core competency for the practice of emergency medicine comprising a specific competency milestone in the Accreditation for Graduate Medical Education Next Accreditation System. 1 Despite advances in technology such as end-tidal CO 2 monitoring, the safety profiles of commonly used From the

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