Timing of Transport of Patients with COVID-19.

RATIONALE: The objective of this study was to evaluate the risk of mortality or ECMO cannulation for patients with confirmed or suspected COVID-19 transferred from sending hospitals to receiving tertiary care centers as a function of the duration of time at the sending hospital. OBJECTIVE: To determine outcomes of critically ill patients with COVID-19 who were transferred to tertiary or quarternary care medical centers. MATERIALS AND METHODS: Retrospective cohort study of critical care transports of patients to one of seven consortium tertiary care centers from March 1, 2020, through September 4, 2020. Age 14 years and older with confirmed or suspected COVID-19 transported from a sending hospital to a receiving tertiary care center by the critical care transport organization. RESULTS: Patients transported with confirmed or suspected COVID-19 to tertiary care centers had a mortality rate of 38.0%. Neither the number of days admitted, nor the number of days intubated at the sending hospital correlated with mortality (correlation coefficient 0.051 and -0.007, respectively). Similarly, neither the number of days admitted, nor number of days intubated at the sending hospital correlated with ECMO cannulation (correlation coefficient 0.008 and -0.036, respectively). CONCLUSION: It may be reasonable to transfer a critically ill COVID-19 patient to a tertiary care center even if they have been admitted at the sending hospital for several days.

Air Versus Ground Transport Times in an Urban Center.

PURPOSE: Given that the benefits of helicopter transport vary with geography and healthcare systems, we assessed transport times for rotor wing versus ground transport over a 10 year period in an urban setting. MATERIALS AND METHODS: All completed transports from 153 sending hospitals in New England from 2009 through 2018 to 8 local tertiary care centers were extracted from an administrative database. The primary outcome of interest was patient-loaded transport time for rotor wing versus ground transports. Overall, 25,483 patient transports met the inclusion criteria and were included in this study. We assessed patient-loaded transport time for all transports, and determined mean time to arrive at the scene, scene to patient time, the bedside time, and distance at which the patient-loaded transport time was faster for rotor wing than for ground transport. We also performed subgroup analyses, evaluating transport times by time of day, day of the week, and destination. RESULTS: The most common indication for transport was adult trauma, (n = 6,008, 23.6%) followed by adult cardiac (n = 4359, 17.1%), adult neuro (3729 14.6%), and adult medical (n = 3691, 14.5%). The median miles traveled for all transports was 26.0, IQR 14-38, ranging from 1 to 264 miles. The median patient-loaded transport time was 27 min (IQR 15-40) for all transports. Nearly all time intervals were shorter for rotor wing versus ground transports, and patient-loaded transport time was significantly shorter at 15 minutes compared to 38 minutes (IQR 12-22 vs 28-33, p < 0.001). There was no distance at which the patient-loaded transport time was faster for ground transport than for rotor wing. CONCLUSIONS: In over 25,000 transports over 10 years, in a compact metropolitan area with relatively short transport distances and times, the use of the helicopter was associated with substantial time savings.

'Educator with a capital E': Comparing medical education experiences of student-as-teacher elective participants and peers.

PURPOSE: Student-as-teacher electives are increasingly offered at medical schools, but little is known about how medical education experiences among enrolled students compare with those of their peers. The study's aim was to characterize medical students' education-related experiences, attitudes, knowledge, and skills based on their enrollment status in a student-as-teacher course. MATERIALS/METHODS: We conducted four focus groups at a medical school in the United States: two with graduating students in a student-as-teacher elective (n = 11) and two with unenrolled peers (n = 11). Transcripts were analyzed using the Framework Method to identify themes. RESULTS: Four themes emerged: interest in and attitudes towards medical education; medical education skills, knowledge, and frameworks; strategies for giving/receiving feedback; medical education training as part of medical school. Course participants demonstrated higher-level education-related knowledge and skills. Both groups endorsed teaching skills as important and identified opportunities to incorporate medical education training into medical school curricula. CONCLUSIONS: Medical education knowledge and teaching skills are self-reported as important learning outcomes for medical students, independent of enrollment status in a student-as-teacher course. The structure of such courses, best understood through a deliberate practice-based model, supports students' achievement of key learning outcomes. Certain course elements may warrant inclusion in standard medical school curricula.

Self-Directed Learning in Medical Education: Training for a Lifetime of Discovery.

Issue: Life-long learning is a skill that is central to competent health professionals, and medical educators have sought to understand how adult professionals learn, adapt to new information, and independently seek to learn more. Accrediting bodies now mandate that training programs teach in ways that promote self-directed learning (SDL) but do not provide adequate guidance on how to address this requirement. Evidence: The model for the SDL mandate in physician training is based mostly on early childhood and secondary education evidence and literature, and may not capture the unique environment of medical training and clinical education. Furthermore, there is uncertainty about how medical schools and postgraduate training programs should implement and evaluate SDL educational interventions. The Shapiro Institute for Education and Research, in conjunction with the Association of American Medical Colleges, convened teams from eight medical schools from North America to address the challenge of defining, implementing, and evaluating SDL and the structures needed to nurture and support its development in health professional training. Implications: In this commentary, the authors describe SDL in Medical Education, (SDL-ME), which is a construct of learning and pedagogy specific to medical students and physicians in training. SDL-ME builds on the foundations of SDL and self-regulated learning theory, but is specifically contextualized for the unique responsibilities of physicians to patients, inter-professional teams, and society. Through consensus, the authors offer suggestions for training programs to teach and evaluate SDL-ME. To teach self-directed learning requires placing the construct in the context of patient care and of an obligation to society at large. The SDL-ME construct builds upon SDL and SRL frameworks and suggests SDL as foundational to health professional identity formation.KEYWORDSself-directed learning; graduate medical education; undergraduate medical education; theoretical frameworksSupplemental data for this article is available online at https://doi.org/10.1080/10401334.2021.1938074 .

ECMO and Right Ventricular Failure: Review of the Literature.

Right ventricular (RV) failure is the inability of the RV to maintain sufficient cardiac output in the setting of adequate preload, due to either intrinsic injury to the RV or increased afterload. Medical treatment of RV failure should include optimizing preload, augmenting contractility with vasopressors and inotropes, and considering inhaled pulmonary vasodilators. However, when medical therapies are insufficient, mechanical circulatory support (MCS) is needed to maintain systemic and RV perfusion. The data on MCS for isolated RV failure are limited, but extracorporeal membrane oxygenation (ECMO) appears to be the most efficient and effective modality. For patients with isolated RV failure from acute hypoxemic respiratory failure, veno-venous (VV) ECMO is an appropriate initial configuration, even if the patient is in shock. With primary RV injury or RV failure with concomitant left ventricle (LV) failure, however, venoarterial (VA) ECMO is indicated. Both modalities provide indirect support to the RV by reducing preload, reducing RV wall tension, and delivering oxygenated blood to the coronary circulation. Peripheral cannulation is required in VV-ECMO and is most commonly used in VA-ECMO, allowing for rapid cannulation even in emergencies. Changes in pulsatility on an arterial catheter waveform can indicate changes in clinical status including changes in myocardial function, inadequate preload, worsening RV failure, and excessive VA-ECMO support leading to an elevated LV afterload. Myocardial function may be improved by titration of inotropes or vasodilators, utilization of an Impella or an intra-aortic balloon counterpulsation support devices, or by changes in VA-ECMO support.

Changes in Oxygen Saturation and Mean Arterial Pressure With Inhaled Epoprostenol in Transport.

OBJECTIVE: Patients with hypoxemic respiratory failure have traditionally been considered one of the riskiest patient populations to transport, given the potential for desaturation with movement. We performed a retrospective cohort study to analyze our experience using inhaled epoprostenol in transport, with a primary objective of assessing change in the oxygen saturation throughout the transport. METHODS: The transport records of patients with severe hypoxemic respiratory failure or right heart failure, transported on inhaled epoprostenol, were reviewed. The primary outcome was the change in SpO2 from the start of the inhaled epoprostenol transport to the time of handover of care at the receiving institution. The secondary outcome was the change in the mean arterial pressure (MAP). RESULTS: Comparing the initial SpO2 to the final, there was no significant difference in oxygenation between time 0 and the transfer of care at the receiving hospital at 91% versus 93% (interquartile range [IQR] 86.0-93.5 vs 87.5-96.0, P = .49). Comparing the SpO2 for those who had inhaled epoprostenol started by the transport team showed a larger change at 86% compared to 93% (IQR: 83.0-91.0 vs 86.5-94.5, P = .04). There was no change in the median MAP from time 0 to the end of the transport (77 vs 75 mm Hg, IQR, 67.5-84.8 vs 68.5-85.8, P = .70). CONCLUSIONS: In this study, patients with severe cardiopulmonary compromise transported on inhaled epoprostenol had no significant change in their median oxygen saturations, with the overall population increasing from 91% to 93%. When inhaled epoprostenol was initiated by the transport team, the improvement was clinically and statistically significant with an increase in SpO2 from 86% to 93%, with a final oxygen saturation comparable to those who were on the medication at the time of the team's arrival.

Critical Care Transport of Patients With COVID-19.

PURPOSE: Critical care transport is associated with a high rate of adverse events, and the risks and outcomes of transporting critically ill patients during the COVID-19 pandemic have not been previously described. MATERIALS AND METHODS: We performed a retrospective review of transports of subjects with suspected or confirmed COVID-19 from sending hospitals to tertiary care hospitals in Boston. Follow-up data were obtained for patients transported between March 1st and April 20th, 2020. RESULTS: Of 254 charts identified, 250 patients were transported. Nine patients (3.5%) had cardiac arrest prior to transport. Twenty-nine (11.6%) had hypotension, 22 (8.8%) had a critical desaturation, and 4 (1.6%) had both en route. Hospital follow-up data were available for 189 patients. Of those intubated during their hospitalization, 44 (25.0%) had died, 59 (33.5%) had been extubated, and 13 (17.6%) had been discharged alive. For the subgroup with prior cardiac arrest, follow-up data available for 6. Of these 6, 2 died and 4 (66.7%) have been discharged alive. CONCLUSIONS: Few patients with COVID-19 had an adverse event in transport. The in-hospital mortality rate was 25%, with a 33.5% extubation rate. Patients resuscitated from cardiac arrest prior to transport had a 66.7% discharge rate among those transported to consortium hospitals.

Twelve tips for developing and implementing a medical education Twitter chat.

Live discussions on the social media site Twitter or Twitter chats are gaining popularity as powerful tools for engaging a broad audience in an interactive discussion. Medical education, in particular, is experiencing an increase in the use of this modality to support informal learning, as a means to encourage collaboration and share best practices, and as a platform for large-scale mentorship. Despite this growth in popularity, there are limited data to guide medical educators on the fundamentals of organizing a Twitter chat. In this Twelve Tips article, we discuss strategies relevant to potential Twitter chat organizers. We have arranged the tips chronologically, beginning with a discussion of initial considerations when planning and formulating a chat topic and publicizing the chat to potentially interested people and groups, followed by practical considerations while hosting the chat, and finally strategies for evaluating and extending a Twitter chat's impact.

Association Between Do Not Resuscitate/Do Not Intubate Orders and Emergency Medicine Residents' Decision Making.

BACKGROUND: Research has shown that do not resuscitate (DNR) and do not intubate (DNI) orders may be construed by physicians to be more restrictive than intended by patients. Previous studies of physicians found that DNR/DNI orders are associated with being less willing to provide invasive care. OBJECTIVES: The purpose of this study was to assess the influence of code status on emergency residents' decision-making regarding offering invasive procedures for those patients with DNR/DNI compared with their full code counterparts. METHODS: We conducted a nationwide survey of emergency medicine residents using an instrument of 4 clinical vignettes involving patients with serious illnesses. Two versions of the survey, survey A and survey B, alternated the DNR/DNI and full code status for the vignettes. Residency leaders were contacted in August 2018 to distribute the survey to their residents. RESULTS: Three hundred and three residents responded from across the country. The code status was strongly associated with decisions to intubate or perform CPR and influenced the willingness to offer other invasive procedures. DNR/DNI status was associated with less frequent willingness to place central venous catheters (88.2% for DNR/DNI vs. 97.2% for full code, p < 0.001), admit patients to the intensive care unit (89.9% vs. 99.0%, p < 0.001), offer dialysis (79.3% vs. 98.0%, p < 0.001), and surgical consultation (78.7% vs. 94.2%, p < 0.001). CONCLUSIONS: In a nationwide survey, emergency medicine residents were less willing to provide invasive procedures for patients with DNR/DNI status, including the placement of central venous catheters, admission to the intensive care unit, and consultation for dialysis and surgery.

The Effect of Lights and Sirens on Critical Care Transport Time.

BACKGROUND: In the prehospital setting, the use of ambulance lights and sirens (L&S) has been found to result in minor decreases in transport times, but has not been studied in interfacility transportation. OBJECTIVE: The objective of this study was to evaluate the indications for L&S and the impact of L&S on transport times in interfacility critical care transport. METHODS: We performed a retrospective analysis using administrative data from a large, urban critical care transportation organization. The indications for L&S were assessed and the transport times with and without L&S were compared using distance matching for common transport routes. Median times were compared for temporal subgroups. RESULTS: L&S were used in 7.3% of transports and were most strongly associated with transport directly to the operating room (odds ratio 15.8; 95% confidence interval 6.32-39.50; p < 0.001). The timing of the transport was not associated with L&S use. For all transports, there was a significant decrease in the transport time using L&S, with a median of 8 min saved, corresponding to 19.5% of the overall transportation time without L&S (33 vs. 41 min; p < 0.001). The reduction in transport times was consistent across all temporal subgroups, with a greater time reduction during rush hour transports. CONCLUSIONS: The use of L&S during interfacility critical care transport was associated with a statistically significant time reduction in this urban, single-system retrospective analysis. Although the use of L&S was not associated with rush-hour transports, the greatest time reduction was associated with L&S transport during these hours.

The Implications of the Current Visa System for Foreign Medical Graduates During and After Graduate Medical Education Training.

The current and projected deficit in the physician workforce in the US is a challenge for primary care and specialty medical settings. Foreign medical graduates (FMGs) represent an important component of the US graduate medical education (GME) training pathway and can help to address the US physician workforce deficit. Availability of FMGs is particularly important to the internal medicine community, as recent data demonstrate that internal medicine is the specialty with the highest number of FMGs. System-based and logistical inefficiencies in the current US visa system represent significant obstacles to FMG trainees and have important psychological, emotional, and logistical consequences to FMG engagement and participation in US GME training and in the post-training workforce. In this article, we review the contemporary structure, process, and challenges of obtaining a visa for GME training. The H1B and J1 visa programs are compared and contrasted, with an emphasis on logistical specifics for FMG GME trainees and training programs. The process of and options for J1 visa waivers are reviewed. These considerations are specifically reviewed in the context of recent policy decisions by the Trump administration, with emphasis on the effects of these decisions on FMGs in medical training and practice.

Practical Considerations for the Academic Physician Moving to a New State.

Moving from one state to another for a new position or opportunity is a common event for academic physicians. Although moving can be personally and professionally disruptive for everyone, it can be particularly challenging for academic physicians. From practical considerations such as applying for a new state medical license to professional challenges such as minimizing disruption to educational or research projects, there are numerous challenges associated with relocating to an academic institution in a new state. Despite the frequency with which academic physicians move between institutions in different states, we could not identify any practical guidance about moving in the literature. We searched the peer-reviewed literature, reviewed non-peer-reviewed open access sources, and drew from our own experience as academic physicians who have recently moved, and collated pertinent resources to develop a guide of what physicians need to consider when planning a move to a new position in a new state. Our review and guidance considers the following issues: state licensing, governmental certification, maintaining communication with collaborators and colleagues, working with institutional review boards regarding ongoing research projects, transferring funds from grants, transitioning out of clinical practice, and transferring data and resources. Anticipating the requirements and challenges of moving can help academic physicians, whether at the beginning, middle, or end of their careers, with the process of moving to a new state for a new position.

Mortality and Resource Utilization After Critical Care Transport of Patients With Hypoxemic Respiratory Failure.

INTRODUCTION: We performed this study to quantify resources required by mechanically ventilated patients with hypoxemia after critical care transport (CCT) and to assess short-term clinical outcomes. METHODS: We performed a retrospective review of transports of patients with severe hypoxemic respiratory failure from referring hospitals to 3 tertiary care hospitals to assess the outcomes including in-hospital mortality, ventilator days, intensive care unit length of stay (LOS), hospital LOS, disposition, and reported neurologic status on hospital discharge as well as medical interventions specific to acute respiratory failure and critical care. RESULTS: Of 230 patients transported with hypoxemic respiratory failure, 152 survived to hospital discharge, for a mortality rate of 34.5%, despite a predicted mortality of 64% by Acute Physiology and Chronic Health Evaluation II (APACHE II) score. Twenty-five percent of patients were treated with neuromuscular blockade, 10.1% received inhaled pulmonary vasodilators, and extracorporeal membrane oxygenation was initiated in 2.6%. CONCLUSIONS: In this cohort with hypoxemic respiratory failure transported to tertiary care facilities, patients had a mortality rate comparable to patients with acute respiratory distress syndrome treated with best practices and a mortality rate lower than predicted based on APACHE-II score. The risks of CCT are outweighed by the benefits of transfer to a tertiary care facility, and pretransport hypoxemia should not be used as an absolute contraindication to transport.

Avoiding premature closure and reaching diagnostic accuracy: some key predictive factors.

CONTEXT: Early studies suggested that experienced clinicians simply generate more accurate diagnoses than those less experienced. However, more recent studies indicate that experienced clinicians may be subject to biases in formulating and confirming hypotheses that lead to inaccuracy. OBJECTIVES: The goal of this study was to identify factors associated with the ability to process information in ways that overcome premature closure and result in accurate diagnosis using a set of vignettes in which inconsistent information was introduced midway. METHODS: Seventy-five participants (25 Year 3 medical students, 25 internal medicine residents in their second year of residency and 25 internal medicine faculty) were recruited to solve each of four complex clinical vignettes. In each vignette, the first four rounds of information pointed toward a narrowing range of diagnostic possibilities, but patient information presented in and after the fifth round was inconsistent with prior findings. In addition to accuracy, outcome measures were length of differential diagnosis, certainty of diagnosis, persistence in data collection and tendency to switch diagnoses. RESULTS: There were no significant differences in diagnostic accuracy across the three groups, each of which differed in level of training. However, across experience levels, diagnostic accuracy was associated with the mean number of items in the differential, tendency to persist (e.g. to request a greater number of rounds of information), and openness to switch (e.g. to change the most likely diagnosis on receipt of disconfirming information). CONCLUSIONS: Level of training (i.e. clinical experience) was not associated with accuracy on this task. As faculty clinicians certainly have more knowledge than their junior counterparts, it is important to identify ways in which cognitive factors can lead to more or less persistence and openness, and to teach clinicians how to overcome tendencies associated with error.

Initial mechanical ventilator settings and lung protective ventilation in the ED.

OBJECTIVE: Mechanical ventilation with low tidal volumes has been shown to improve outcomes for patients both with and without acute respiratory distress syndrome. This study aims to characterize mechanically ventilated patients in the emergency department (ED), describe the initial ED ventilator settings, and assess for associations between lung protective ventilation strategies in the ED and outcomes. METHODS: This was a multicenter, prospective, observational study of mechanical ventilation at 3 academic EDs. We defined lung protective ventilation as a tidal volume of less than or equal to 8 mL/kg of predicted body weight and compared outcomes for patients ventilated with lung protective vs non-lung protective ventilation, including inhospital mortality, ventilator days, intensive care unit length of stay, and hospital length of stay. RESULTS: Data from 433 patients were analyzed. Altered mental status without respiratory pathology was the most common reason for intubation, followed by trauma and respiratory failure. Two hundred sixty-one patients (60.3%) received lung protective ventilation, but most patients were ventilated with a low positive end-expiratory pressure, high fraction of inspired oxygen strategy. Patients were ventilated in the ED for a mean of 5 hours and 7 minutes but had few ventilator adjustments. Outcomes were not significantly different between patients receiving lung protective vs non-lung protective ventilation. CONCLUSIONS: Nearly 40% of ED patients were ventilated with non-lung protective ventilation as well as with low positive end-expiratory pressure and high fraction of inspired oxygen. Despite a mean ED ventilation time of more than 5 hours, few patients had adjustments made to their ventilators.

Mechanical Ventilation in Critical Care Transport.

OBJECTIVE: Although the benefit of transferring patients with hypoxemic respiratory failure to tertiary care centers has been shown, transporting hypoxemic patients remains controversial, given the risk of desaturation in transit. METHODS: We performed a retrospective analysis of a database of critical care transports (CCTs) of patients with hypoxemic respiratory failure to quantify the number, types, and effects of ventilator changes performed by the CCT teams. We evaluated the changes in fraction of inspired oxygen (FiO2), positive end-expiratory pressure (PEEP), tidal volume, both FiO2 and PEEP, and the administration of a neuromuscular blocking medication to assess for an association with an improvement in the arterial partial pressure of oxygen (PaO2) from the sending to the receiving hospitals. RESULTS: Ventilator changes were made in 211 (89%) of the 237 identified transports, with significant changes in the tidal volume, PEEP, and FiO2. Analysis of variance revealed a significant relationship between changes in FiO2, PEEP, tidal volume, FiO2 and PEEP, and the administration of neuromuscular blocking agents and change in PaO2 (F5,1037 = 119.6, P < .001). Multivariable regression analyses showed a significant association between an increase in PaO2 and increasing FiO2, increasing FiO2 and PEEP, and the administration of a neuromuscular blocking medication. CONCLUSION: The CCT team performed multiple changes to ventilators. Complex ventilator management was associated with a higher PaO2 on arrival.

Resistin deficiency in mice has no effect on pulmonary responses induced by acute ozone exposure.

Acute exposure to ozone (O3), an air pollutant, causes pulmonary inflammation, airway epithelial desquamation, and airway hyperresponsiveness (AHR). Pro-inflammatory cytokines-including IL-6 and ligands of chemokine (C-X-C motif) receptor 2 [keratinocyte chemoattractant (KC) and macrophage inflammatory protein (MIP)-2], TNF receptor 1 and 2 (TNF), and type I IL-1 receptor (IL-1α and IL-1ß)-promote these sequelae. Human resistin, a pleiotropic hormone and cytokine, induces expression of IL-1α, IL-1ß, IL-6, IL-8 (the human ortholog of murine KC and MIP-2), and TNF. Functional differences exist between human and murine resistin; yet given the aforementioned observations, we hypothesized that murine resistin promotes O3-induced lung pathology by inducing expression of the same inflammatory cytokines as human resistin. Consequently, we examined indexes of O3-induced lung pathology in wild-type and resistin-deficient mice following acute exposure to either filtered room air or O3. In wild-type mice, O3 increased bronchoalveolar lavage fluid (BALF) resistin. Furthermore, O3 increased lung tissue or BALF IL-1α, IL-6, KC, TNF, macrophages, neutrophils, and epithelial cells in wild-type and resistin-deficient mice. With the exception of KC, which was significantly greater in resistin-deficient compared with wild-type mice, no genotype-related differences in the other indexes existed following O3 exposure. O3 caused AHR to acetyl-ß-methylcholine chloride (methacholine) in wild-type and resistin-deficient mice. However, genotype-related differences in airway responsiveness to methacholine were nonexistent subsequent to O3 exposure. Taken together, these data demonstrate that murine resistin is increased in the lungs of wild-type mice following acute O3 exposure but does not promote O3-induced lung pathology.

Teaching during consultation: factors affecting the resident-fellow teaching interaction.

OBJECTIVES: The subspecialty consultation represents a potentially powerful opportunity for resident learning, but barriers may limit the educational exchanges between fellows (subspecialty registrars) and residents (house officers). We conducted a focus group study of internal medicine (IM) residents and subspecialty fellows to determine barriers against and factors facilitating resident-fellow teaching interactions on the wards, and to identify opportunities for maximising teaching and learning. METHODS: We conducted four focus groups of IM residents (n = 18) and IM subspecialty fellows (n = 16) at two academic medical centres in the USA during February and March 2013. Participants represented trainees in all 3 years of residency training and seven IM subspecialties. Four investigators analysed the transcripts using a structured qualitative framework approach, which was informed by literature on consultation and the theoretical framework of activity theory. RESULTS: We identified two domains of barriers and facilitating factors: personal and systems-based. Sub-themes in the personal domain included fellows' perceived resistance to consultations, residents' willingness to engage in teaching interactions, and perceptions and expectations. Sub-themes in the systems-based domain included the process of requesting the consult, the quality of the consult request, primary team structure, familiarity between residents and fellows, workload, work experience, culture of subspecialty divisions, and fellows' teaching skills. These barriers differentially affected the two stages of the consult identified in the focus groups (initial interaction and follow-up interaction). CONCLUSIONS: Residents and fellows want to engage in positive teaching interactions in the context of the clinical consult; however, multiple barriers influence both parties in the hospital environment. Many of these barriers are amenable to change. Interventions aimed at reducing barriers to teaching in the setting of consultation hold promise for improving teaching and learning on the wards.

Extracorporeal Membrane Oxygenation Support for Hypokalemia-induced Cardiac Arrest: A Case Report and Review of the Literature.

BACKGROUND: Hypokalemia is a reversible cause of cardiac arrest in patients presenting to the emergency department (ED). Extracorporeal membrane oxygenation (ECMO) is an established technology for cardiopulmonary support with emerging roles in resuscitation. Here, we review the literature of hypokalemic-induced cardiac arrests and discuss one such case successfully managed with ECMO. CASE REPORT: A 23-year-old Central American man who presented to a community ED under federal custody with several days of nausea and vomiting was found to have a serum potassium level of 1.5 mEq/L. Repeat serum potassium level was 1.1 mEq/L upon arrival to our facility. Within 2 h of arrival, despite electrolyte repletion, he suffered cardiac arrest. Advanced cardiac life support was performed for 45 min. ECMO was initiated while active chest compressions were performed. After aggressive potassium repletion, return of spontaneous circulation was achieved and ECMO was eventually discontinued. Further investigation ultimately confirmed the presence of a potassium-wasting nephropathy, for which the patient had been treated with chronic potassium supplementation prior to entering federal custody. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: ECMO is a well-established modality for cardiopulmonary support, with an emerging role for patients in undifferentiated cardiac arrest presenting to the ED. There is a growing interest in the utility of ECMO in these circumstances. This report highlights hypokalemia as an important cause of cardiac arrest, reviews the treatment and causes of hypokalemia, and demonstrates a potential role for ECMO as a critical temporizing measure to provide time for potassium repletion.

Emergency medicine residents' knowledge of mechanical ventilation.

BACKGROUND: Although Emergency physicians frequently intubate patients, management of mechanical ventilation has not been emphasized in emergency medicine (EM) residency curricula. OBJECTIVES: The objective of this study was to quantify EM residents' education, experience, and knowledge regarding mechanical ventilation. METHODS: We developed a survey of residents' educational experiences with ventilators and an assessment tool with nine clinical questions. Correlation and regression analyses were performed to evaluate the relationship between residents' scores on the assessment instrument and their training, education, and comfort with ventilation. RESULTS: Of 312 EM residents, 218 responded (69.9%). The overall correct response rate for the assessment tool was 73.3%, standard deviation (SD) ± 22.3. Seventy-seven percent (n = 167) of respondents reported ≤ 3 h of mechanical ventilation education in their residency curricula over the past year. Residents reported frequently caring for ventilated patients in the ED, as 64% (n = 139) recalled caring for ≥ 4 ventilated patients per month. Fifty-three percent (n = 116) of residents endorsed feeling comfortable caring for mechanically ventilated ED patients. In multiregression analysis, the only significant predictor of total test score was residents' comfort with caring for mechanically ventilated patients (F = 10.963, p = 0.001). CONCLUSIONS: EM residents report caring for mechanically ventilated patients frequently, but receive little education on mechanical ventilation. Furthermore, as residents' performance on the assessment tool is only correlated with their self-reported comfort with caring for ventilated patients, these results demonstrate an opportunity for increased educational focus on mechanical ventilation management in EM residency training.