Evaluating Operative Exposure for Medical Students in the Era of Virtual Learning: A Single-Institution Experience.

INTRODUCTION: Training at a tertiary center offers clerkship students the opportunity to rotate through a wide range of surgical specialties that may not be otherwise available. At our institution, students rotate through general surgery for 3 out of 9 weeks, with the remainder offering electives. As a result, students may have limited experience with core general surgery cases which are necessary to complete by the end of the clerkship to demonstrate competency. In efforts to standardize clinical training, students must log 11 core general surgery cases either in the operating room or modules via Wise-MD. Wise-MD is used in place of participating in the operating room when students do not have the opportunity to see certain cases during their surgical rotation. The purpose of the study is to ascertain what proportion of third year medical students experience core general surgery cases in the operating room versus Wise-MD, providing insight into ways to improve the surgical clerkship. METHODS: Clerkship students recorded whether surgical cases are completed via Wise-MD or experienced in the operating room. Forms submitted by students who completed surgical clerkship between January 2018 to September 2022 were analyzed. For each core surgical case (anorectal, appendicitis, bowel obstruction, breast cancer, cholecystitis, colon cancer, diverticulitis, inguinal hernia, lung cancer, skin cancer, and trauma) students were stratified based on their reported experience. The proportion of Wise-MD versus operating room cases was calculated. RESULTS: Between January 2018 and September 2022 a total of 411 students submitted completed case logs. Among all surgical cases, 60% were experienced by students in the operating room. The surgical cases with the highest proportion of operating room experience included appendicitis (78%), cholecystitis (85%), inguinal hernia (79%), and trauma (76%). The surgical cases with the lowest proportion of operating room experience included lung cancer (34%) and skin cancer (44%). CONCLUSION: Despite enforcing a general surgery block, about 40% of students are not experiencing most "bread and butter" surgical cases. Clerkship directors should be mindful about the distribution of medical students among surgical teams as this may affect which cases are observed. Moreover, the opportunity for surgical electives may influence general surgery exposure.

Evaluation of distal tibia slope in pilon fractures after surgical fixation.

INTRODUCTION: Alteration of sagittal alignment during fracture fixation directly impacts ankle motion in dorsiflexion and plantarflexion. Previously research measured the anterior distal tibia angle (ADTA) in a normal healthy population. The null hypothesis for this study is that ADTA is restored to normal range following unstable pilon fractures. The aim of this study is to identify the range of the ADTA in distal tibia fractures after surgical fixation, compared to a previously published normal population. MATERIAL AND METHODS: A retrospective review of operative distal tibia fractures (AO/OTA classification 43A and 43C - 43B were excluded due to lower likelihood of fracture changing the ADTA) was performed. ADTA on lateral radiograph was measured as the angle relative to the tibia shaft. RESULTS: 100 patients with post-operative radiographs that met inclusion criteria were analyzed. The average ADTA was 6.9° (⌠=4.62°) with a maximum slope of 19.2° (i.e. anterior orientation) and a minimum of -3.3° (i.e. posterior orientation). The uninjured population had an average ADTA of 6.0° (range -2.0°-14°, ⌠=3.0°). CONCLUSION: This analysis shows the average distal tibia sagittal alignment in the post-surgical group is similar to a normal, uninjured population. Large alterations in ADTA would directly impact the ankle in the plane of motion (i.e. negative ADTA would decrease ankle dorsiflexion). Considering ADTA as an objective intra-operative parameter optimizes sagittal plane alignment.

Duration and clinical features of cardiac arrest predict early severe cerebral edema.

BACKGROUND: Severe brain edema appears early after cardiopulmonary resuscitation (CPR) in a subset of patients and portends a poor prognosis. We tested whether clinical features of patients or resuscitation during out-of-hospital cardiac arrest (OHCA) are associated with early, severe cerebral edema. METHOD/RESEARCH DESIGN: We reviewed pre-hospital and hospital records for comatose patients surviving to hospital admission after OHCA who had computed tomography (CT) of brain at the time of hospital admission available for inspection. We measured the gray-white ratio (GWR) of X-ray attenuation between the caudate nucleus and posterior limb of the internal capsule, defining severe cerebral edema as GWR < 1.20. We calculated associations between severe cerebral edema and patient or resuscitation variables. RESULTS: Between 2010 and 2019, 1340 subjects were admitted of whom 296 (22%) showed severe cerebral edema on initial CT. Subjects with severe edema had lower survival (5/296, 2% vs. 377/1044, 36%). Severe edema was independently associated with total CPR duration, total dose of epinephrine, younger age, non-shockable arrest rhythms, fewer total number of rescue shocks, rearrest after initial return of pulses, and non-cardiac arrest etiology. Prevalence of severe cerebral edema increased from 2% among subjects with 0-10 min of CPR to 31% among subjects with >40 min of CPR. CONCLUSION: CPR duration along with easily measurable clinical and resuscitation characteristics predict early severe cerebral edema after OHCA. Future interventional trials should consider targeting or preventing cerebral edema after prolonged hypoxic-ischemic brain injury especially in patients with high risk clinical features.