A Longitudinal Survey on Canadian Emergency Physician Burnout.

STUDY OBJECTIVE: Since Canada eased pandemic restrictions, emergency departments have experienced record levels of patient attendance, wait times, bed blocking, and crowding. The aim of this study was to report Canadian emergency physician burnout rates compared with the same physicians in 2020 and to describe how emergency medicine work has affected emergency physician well-being. METHODS: This longitudinal study on Canadian emergency physician wellness enrolled participants in April 2020. In September 2022, participants were invited to a follow-up survey consisting of the Maslach Burnout Inventory and an optional free-text explanation of their experience. The primary outcomes were emotional exhaustion and depersonalization levels, which were compared with the Maslach Burnout Inventory survey conducted at the end of 2020. A thematic analysis identified common stressors, challenges, emotions, and responses among participants. RESULTS: The response rate to the 2022 survey was 381 (62%) of 615 between September 28 and October 28, 2022, representing all provinces or territories in Canada (except Yukon). The median participant age was 42 years. In total, 49% were men, and 93% were staff physicians with a median of 12 years of work experience. 59% of respondents reported high emotional exhaustion, and 64% reported high depersonalization. Burnout levels in 2022 were significantly higher compared with 2020. Prevalent themes included a broken health care system, a lack of societal support, and systemic workplace challenges leading to physician distress and loss of physicians from the emergency workforce. CONCLUSION: We found very high burnout levels in emergency physician respondents that have increased since 2020.

Addressing microaggressions with simulation: a novel educational intervention.

There is an urgent need for education around equity, diversity, inclusivity, indigeneity, and accessibility (EDIIA). One important facet of this is gender-related microaggressions, which are a common occurrence in the emergency department. Most emergency medicine residents receive few opportunities to discuss, understand, and approach these occurrences in the clinical setting. To address this, we created a novel immersive session exploring gender-based microaggressions through a simulation experience followed by reflective teaching to foster allyship and practice tools for responding to microaggressions. An anonymous survey was subsequently distributed to elicit feedback, which was positive. After this successful pilot, next steps include creating sessions to address other microaggressions. Limitations include implicit biases of facilitators and ensuring that facilitators can engage in brave spaces and open conversations. Others trying to integrate gendered microaggression training into their EDIIA curricula could model our innovation.

RéSUMé: Il existe un besoin urgent d'éducation sur l'équité, la diversité, l'inclusivité, l'indigénéité et l'accessibilité (EDIIA). Les micro-agressions liées au genre, qui sont monnaie courante dans les services d'urgence, en sont une facette importante. La plupart des résidents en médecine d'urgence ont peu d'occasions de discuter, de comprendre et d'aborder ces événements en milieu clinique. Pour y remédier, nous avons créé une nouvelle session immersive explorant les micro-agressions basées sur le genre par le biais d'une expérience de simulation suivie d'un enseignement réflexif pour favoriser l'alliance et la pratique d'outils pour répondre aux micro-agressions. Un sondage anonyme a ensuite été distribué pour obtenir des commentaires, qui ont été positifs. Après ce projet pilote réussi, les prochaines étapes comprennent la création de séances pour aborder d'autres micro-agressions. Les limites comprennent les préjugés implicites des animateurs et la garantie que les animateurs peuvent s'engager dans des espaces courageux et des conversations ouvertes. D'autres personnes qui tentent d'intégrer une formation sur les micro-agressions sexistes dans leur programme EDIIA pourraient s'inspirer de notre innovation.

COVID-19 has heightened tensions between and exposed threats to core values of emergency medicine.

BACKGROUND: Professional culture is a powerful influence in emergency departments, but incompletely understood. Disasters magnify cultural realities, and as such the COVID-19 pandemic offered a unique opportunity to better understand emergency medicine (EM) values, practices, and beliefs. METHODS: We conducted a collaborative ethnography at a tertiary care center during the acute phase of the response to the threat of COVID-19 (March-May 2020). Collaborative ethnography is a method that partners directly with communities during design, data gathering, and analysis to study culture. An ED-based research team gathered data including field notes from 300 h of participant observation and informal interviews, 42 semi-structured interviews, and 57 departmental documents. Data were deductively coded using a previously generated framework for understanding EM culture. RESULTS: Each of seven core values from the original framework were identified in the dataset and further contextualized understanding of EM culture. COVID-19 exacerbated pre-existing tensions and threats to the core values of EM. For example, the desire to provide patient-centered care was impeded by strict visitor restrictions; the ability to treat life-threatening illness was impaired by new resuscitation room layouts and infection control procedures; and subtle changes in protocols had downstream impact on flow and the ability to balance needs and resources at a system level. The cultural values related to teams were protective and strengthened during this time. The pandemic exposed problems with the status quo, underscored inherent tensions between ED values, and highlighted threats to self-identity. CONCLUSION: COVID-19 has highlighted and compounded existing tensions and threats to the core values of EM, underscoring a critical mismatch between values and practice. Realignment of the realities of ED work with staff values is urgently needed.

RéSUMé: CONTEXTE: La culture professionnelle est une influence puissante dans les services d'urgence, mais elle est incomplètement comprise. Les catastrophes amplifient les réalités culturelles et, à ce titre, la pandémie de COVID-19 a offert une occasion unique de mieux comprendre les valeurs, les pratiques et les croyances de la médecine d'urgence (MU). MéTHODES: Nous avons mené une ethnographie collaborative dans un centre de soins tertiaires pendant la phase aiguë de la réponse à la menace du COVID-19 (mars-mai 2020). L'ethnographie collaborative est une méthode qui s'associe directement aux communautés pendant la conception, la collecte de données et l'analyse pour étudier la culture. Une équipe de recherche basée à l'urgence a recueilli des données, y compris des notes de terrain tirées de 300 heures d'observation des participants et d'entrevues informelles, de 42 entrevues semi-structurées et de 57 documents ministériels. Les données ont été codées de manière déductive à l'aide d'un cadre précédemment créé pour comprendre la culture de la MU. RéSULTATS: Chacune des sept valeurs fondamentales du cadre original a été identifiée dans l'ensemble de données et a permis de mieux comprendre la culture de la MU. COVID-19 a exacerbé les tensions préexistantes et les menaces qui pèsent sur les valeurs fondamentales de la MU. Par exemple, le désir de fournir des soins centrés sur le patient a été entravé par des restrictions strictes concernant les visiteurs ; la capacité de traiter des maladies potentiellement mortelles a été compromise par les nouvelles dispositions des salles de réanimation et des procédures de contrôle des infections ; et des changements subtils dans les protocoles ont eu un impact en aval sur le flux et la capacité à équilibrer les besoins et les ressources au niveau du système. Les valeurs culturelles liées aux équipes étaient protectrices et renforcées pendant cette période. La pandémie a mis en évidence les problèmes liés au statu quo, souligné les tensions inhérentes entre les valeurs des services d'urgence et mis en évidence les menaces pour l'identité personnelle. CONCLUSION: COVID-19 a mis en évidence et aggravé les tensions et les menaces existantes pour les valeurs fondamentales de la MU, soulignant un décalage critique entre les valeurs et la pratique. Il est urgent de réaligner les réalités du travail dans les services d'urgence sur les valeurs du personnel.

The ultrasound competency assessment tool for four-view cardiac POCUS.

BACKGROUND: Point-of-care ultrasound (POCUS) has been recognized as an essential skill across medicine. However, a lack of reliable and streamlined POCUS assessment tools with demonstrated validity remains a significant barrier to widespread clinical integration. The ultrasound competency assessment tool (UCAT) was derived to be a simple, entrustment-based competency assessment tool applicable to multiple POCUS applications. When used to assess a FAST, the UCAT demonstrated high internal consistency and moderate-to-excellent inter-rater reliability. The objective of this study was to validate the UCAT for assessment of a four-view transthoracic cardiac POCUS. RESULTS: Twenty-two trainees performed a four-view transthoracic cardiac POCUS in a simulated environment while being assessed by two observers. When used to assess a four-view cardiac POCUS the UCAT retained its high internal consistency ([Formula: see text] and moderate-to-excellent inter-rater reliability (ICCs = 0.61-0.91; p's ≤ 0.01) across all domains. The regression analysis suggestion that level of training, previous number of focused cardiac ultrasound, previous number of total scans, self-rated entrustment, and intent to pursue certification statistically significantly predicted UCAT entrustment scores [F (5,16) = 4.06, p = 0.01; R2 = 0.56]. CONCLUSION: This study confirms the UCAT is a valid assessment tool for four-view transthoracic cardiac POCUS. The findings from this work and previous studies on the UCAT demonstrate the utility and flexibility of the UCAT tool across multiple POCUS applications and present a promising way forward for POCUS competency assessment.

The Ultrasound Competency Assessment Tool (UCAT): Development and Evaluation of a Novel Competency-based Assessment Tool for Point-of-care Ultrasound.

OBJECTIVES: Point-of-care ultrasound (POCUS) has become an integral diagnostic and interventional tool. Barriers to POCUS training persist, and it continues to remain heterogeneous across training programs. Structured POCUS assessment tools exist, but remain limited in their feasibility, acceptability, reliability, and validity; none of these tools are entrustment-based. The objective of this study was to derive a simple, entrustment-based POCUS competency assessment tool and pilot it in an assessment setting. METHODS: This study was composed of two phases. First, a three-step modified Delphi design surveyed 60 members of the Canadian Association of Emergency Physicians Emergency Ultrasound Committee (EUC) to derive the anchors for the tool. Subsequently, the derived ultrasound competency assessment tool (UCAT) was used to assess trainee (N = 37) performance on a simulated FAST examination. The intraclass correlation (ICC) for inter-rater reliability and Cronbach's alpha for internal consistency were calculated. A statistical analysis was performed to compare the UCAT to other competency surrogates. RESULTS: The three-round Delphi had 22, 26, and 26 responses from the EUC members. Consensus was reached, and anchors for the domains of preparation, image acquisition, image optimization, and clinical integration achieved approval rates between 92 and 96%. The UCAT pilot revealed excellent inter-rater reliability (with ICC values of 0.69-0.89; p < 0.01) and high internal consistency (α = 0.91). While UCAT scores were not impacted by level of training, they were significantly impacted by the number of previous POCUS studies completed. CONCLUSIONS: We developed and successfully piloted the UCAT, an entrustment-based bedside POCUS competency assessment tool suitable for rapid deployment. The findings from this study indicate early validity evidence for the use of the UCAT as an assessment of trainee POCUS competence on FAST. The UCAT should be trialed in different populations performing several POCUS study types.

Differences in Gaze Fixation Location and Duration Between Resident and Fellowship Sonographers Interpreting a Focused Assessment With Sonography in Trauma.

OBJECTIVES: We quantified the gaze fixation duration of resident and fellowship sonographers interpreting a prerecorded focused assessment with sonography in trauma (FAST). We hypothesized that all sonographers would fixate on each relevant anatomic relationship but that the duration of fixation would differ. METHODS: We conducted a cross-sectional study collecting and analyzing the gaze fixations of a convenience sample of current resident and fellowship sonographers. All sonographers viewed a standardized FAST video, and their gaze fixations were recorded using a Tobii X3-120 eye-tracking bar. Gaze fixations over nine anatomic regions of interest (ROIs) were identified. These were assessed for normality and analyzed using the Wilcoxon rank sum test at an alpha of 0.05 and Bonferroni correction p value of <0.0034. The chi-square test and Pearson's correlation were performed to assess statistical association. RESULTS: The gaze fixation recordings of 24 resident and eight fellowship sonographers were suitable for analysis. Fourteen of the 24 resident sonographers viewed all ROIs in the FAST, whereas all eight fellowship sonographers viewed each of the nine relevant ROIs. Five ROIs were identified over which at least one resident sonographer did not have a gaze fixation. No statistically significant difference was identified between groups. Resident sonographers gaze fixated over the left upper quadrant (LUQ) splenorenal interface for a median (interquartile range) of 10.64 (9.73-11.60) seconds. The fellowship group viewed the same ROI for 8.43 (6.64-8.95) seconds (p < 0.003). All participants viewed this ROI. No other ROIs had a statistical difference. CONCLUSION: Five ROIs were identified that were not visually interrogated by all resident sonographers. Only 14 of 24 resident sonographers visually interrogated every area in the FAST, whereas all fellowship sonographers interrogated every ROI. A statistically significant difference was found in gaze fixation duration between resident and fellowship sonographers in one ROI. Further study is required for gaze fixation assessment to become a tool for the interpretation component of point-of-care ultrasound.

An environmental scan of wellness initiatives and programs at Canadian academic emergency medicine programs: How far have we come?

OBJECTIVES: We sought to conduct a major objective of the Canadian Association of Emergency Physicians (CAEP) Wellness Committee, an environmental scan of the academic emergency medicine programs across the 17 Canadian medical schools. METHODS: An 89-question questionnaire was distributed to academic heads or wellness leads. The responses were verified by the lead author to ensure that the questions were answered completely and consistently. RESULTS: While formal wellness programs may exist in varying degrees across the 17 universities, most were found to exist only at local, divisional, or departmental levels. A broad variability of established leadership positions exists. Shift practices varied greatly. In day to day practice, availability for food and debriefing were high and childcare, sleep rooms, and follow-up following critical incidents were low. Sabbaticals existed in the majority of centers. Roughly 50% of departments have gender equity program and annual retreats. Centers report programs for the initiation of leaves (82%), onboarding (64%), and reorientation (94%). Support of health benefits (76%) and pensions (76%) depended on type of appointment and relationship to the university. Fiscal transparency was reported in 53% of programs. CONCLUSION: Wellness and burnout are critical issues for emergency medicine in Canada. This comprehensive review of wellness programs identifies areas of strength, but also allows identification of areas of improvement for future work. Individual centers can identify common options when developing or expanding their wellness programs.

Point-of-care ultrasound for the detection of hydronephrosis in emergency department patients with suspected renal colic.

BACKGROUND: Point-of-care ultrasound (PoCUS) by emergency physicians for renal colic has been proposed as an alternative to computed tomography (CT) to avoid ionizing radiation exposure and shorten emergency department length of stay. Previous studies have employed experienced or credentialed ultrasonographers or required advanced ultrasound skills. We sought to measure the diagnostic accuracy of PoCUS by physicians with varied experience using a simplified binary outcome of presence or absence of hydronephrosis. Secondary outcomes include assessment as to whether the presence of hydronephrosis on PoCUS is predictive of complications, and to evaluate possible causes for the reduced diagnostic accuracy such as body mass index (BMI) and time between PoCUS and formal imaging, and scanner experience. RESULTS: 413 patients were enrolled in the study. PoCUS showed a specificity of 71.8% [95% CI 65.0, 77.9] and sensitivity of 77.1% [95% CI 70.9, 82.6]. Hydronephrosis on PoCUS was predictive of complications (relative risk 3.13; [95% CI 1.30, 7.53]). The time interval between PoCUS and formal imaging, BMI, and scanner experience did not influence the accuracy of PoCUS. CONCLUSIONS: PoCUS for hydronephrosis in suspected renal colic has moderate accuracy when performed by providers with varied experience for the binary outcome of presence or absence of hydronephrosis. Hydronephrosis on PoCUS is associated with increased rates of complications. PoCUS for hydronephrosis is limited in its utility as a stand-alone test, however this inexpensive, readily available test may be useful in conjunction with clinical course to determine which patients would benefit from formal imaging or urologic consultation. ClinicalTrials.gov Identifier NCT01323842.

Emergency medicine physician burnout and wellness in Canada before COVID19: A national survey.

INTRODUCTION: Emergency medicine (EM) is a high-risk specialty for burnout. COVID-19 has had and will continue to have important consequences on wellness and burnout for EM physicians in Canada. Baseline data are crucial to monitor the health of EM physicians in Canada, and evaluate any interventions designed to help during and after COVID-19. OBJECTIVES: To describe the rates of burnout, depression, and suicidality in practicing EM physicians in Canada, just before the COVID-19 pandemic. METHODS: A modified snowball method was used for survey distribution. Participants completed the Maslach Burnout Inventory - Health Services Tool (MBI-HSS), a screening measure for depression (PHQ-9), and a question regarding if the physician had ever or in the past 12 months contemplated suicide. RESULTS: A total of 384 respondent surveys were included in the final analysis: 86.1% (329/382) met at least one of the criteria for burnout, 58% (217/374) scored minimal to none on the PHQ-9 screening tool for depression, 14.3% (53/371) had contemplated suicide during their staff career in EM, and of those, 5.9% (22/371) had actively considered suicide in the past year. CONCLUSION: Canadian EM physicians just before the COVID-19 pandemic had an alarming number of respondents meet the threshold for burnout, confirming EM as a high-risk specialty. This important baseline information can be used to monitor the physical and mental risks to EM physicians during and after COVID-19, and evaluate support for mental health and wellness, which is urgently needed now and post pandemic.

Cognitive load theory as a framework for simulation-based, ultrasound-guided internal jugular catheterization training: Once is not enough.

OBJECTIVE: The main objective of this study was to use the principles of cognitive load theory to design a curriculum that incorporates a progressive part practice approach to teaching ultrasound-guided (USG) internal jugular catheterization (IJC) to novices. A secondary objective was to compare the technical proficiency of residents trained using this curriculum with the technical proficiency of residents trained with the current local standard of a single simulation session. METHODS: The experimental group included 16 residents who attended three 2-hour sessions of progressive part practice in a simulation lab. The control group included 46 residents who attended the current local standard of a single 2-hour simulation session just prior to their intensive care unit rotation. Technical proficiency was assessed using hand motion analysis and time to procedure completion. RESULTS: After three sessions, median scores for right hand motion (RHM) (34.5; [27.0-49.0]), left hand motion (LHM) (35.5; [20.0-45.0]), and total time (TT) (117.0 s; [82.7-140.0]) in the experimental group were significantly better than the control group (p<0.001). Results for eight experimental group residents who were assessed for retention at a later date revealed median scores for RHM (45.0; [32.0-58.0]), LHM (33.5; [20.0-63.0]), and TT (150.0 s; [103.0-399.6]), which were significantly better than those of the control group (p=0.01, p<0.01, and p=0.02, respectively). CONCLUSION: These results support multiple sessions of progressive part practice in a simulation lab as an effective competency-based approach to teaching USG IJC in preparation for the clinical setting.

Teaching diagnostic reasoning: using simulation and mixed practice to build competence.

The acquisition of competence in diagnostic reasoning is essential for medical trainees. Exposure to a variety of patient presentations helps develop the skills of diagnostic reasoning, but reliance on ad hoc clinical encounters is inefficient and does not guarantee timely exposure for all trainees. We present a novel teaching series led by emergency physicians that builds upon the existing medical education literature to teach diagnostic reasoning to preclinical (2nd year) medical students. The series used emergency department simulations involving patient actors and simulated vital signs to provide students with exposure to three acute care presentations: chest pain, abdominal pain, and headache. Emergency physicians coached and provided immediate feedback to the students as they actively worked through diagnostic reasoning. The participating medical students reported benefit from these sessions immediately following the sessions and in an 18-month follow-up survey where the students could consider the impact of the sessions on their clinical clerkship. Students felt that the sessions had assisted them in recognizing the key features of relevant diagnoses during clerkship as well as providing a helpful adjunct to their in-class learning.

The core emergency ultrasound curriculum project: A report from the Curriculum Working Group of the CAEP Emergency Ultrasound Committee.

Emergency ultrasound (EUS) is now widely considered to be a "skill integral to the practice of emergency medicine." 1 The Canadian Association of Emergency Physicians (CAEP) initially issued a position statement in 1999 supporting the availability of focused ultrasound 24 hours per day in the emergency department (ED). 2.

A retrospective study of pulseless electrical activity, bedside ultrasound identifies interventions during resuscitation associated with improved survival to hospital admission. A REASON Study.

OBJECTIVE: Our objective was to determine whether organized or disorganized cardiac activity is associated with increased survival in patients who present in pulseless electrical activity (PEA) treated with either 1) standard advanced cardiac life support (ACLS) medications or 2) other interventions. METHODS: This was a secondary analysis of a prospective, multi-center observational study utilizing ultrasound in out-of-hospital or inemergency department PEA arrest. Bedside ultrasound was performed as ACLS protocol started and during pulse checks. Only cases with visible cardiac activity on ultrasound were included in the present analysis. Cardiac activity was categorized as disorganized (agonal twitching) or organized (contractions with changes in ventricular dimensions). Patients were categorized as receiving either standard bolus ACLS medications or alternative medications during the resuscitation (continuous adrenergic agents, thrombolytics, others). The primary outcome was survival to hospital admission. The secondary outcome was return of spontaneous circulation (ROSC). Multivariate modeling was performed to assess association between survival to hospital admission in patients with intravenous adrenergic agents and cardiac activity. RESULTS: In our cohort of 225 patients in PEA cardiac arrest with cardiac activity on ultrasound, the overall survival rate was higher in patients with organized cardiac activity than with disorganized cardiac activity. PEA cardiac arrest patients with organized cardiac activity treated with standard ACLS interventions demonstrated improved survival to hospital admission compared to those with disorganized activity (37.7% (95%CI 24.8-50.2%) versus 17.9% (95%CI 10.9-28%). PEA cardiac arrest patients with organized cardiac activity who received continuous adrenergic agents during the resuscitation and prior to ROSC demonstrated higher survival to hospital admission 45.5% (95%CI 26.9-65.4%) and ROSC 90.9% (95%CI 71.0-98.7%) compared to those with disorganized cardiac activity who received continuous adrenergic agents during the resuscitation 0% (95%CI 0-23.0%) and 47.1% (95%CI 26-69%). Regression analysis demonstrates an association between increased survival in patients receiving intravenous adrenergic agents and organized cardiac activity. CONCLUSION: Survival in patients following PEA arrest is higher in patients with organized cardiac activity. The initiation of continuous adrenergic agents during PEA was associated with improved survival to hospital admission in patients with organized cardiac activity on bedside ultrasound, but this improvement was not seen in patients in PEA with disorganized cardiac activity. Bedside ultrasound may identify a subset of patients that respond differently to ACLS interventions.

Sonographic Accuracy as a Novel Tool for Point-of-care Ultrasound Competency Assessment.

OBJECTIVES: The Focused Assessment with Sonography in Trauma (FAST) is a point-of-care ultrasound (PoCUS) study that is routine in trauma patient assessment. Many organizations have published training guidelines, which grant competency through the completion of a fixed number of observed scans. This approach is incongruent with current trends in competency-based medical education. We aim to objectively quantify probe motion and user accuracy to differentiate groups of PoCUS operators. METHODS: Emergency medicine residents were recruited in two groups. The novice group (n = 15) had limited PoCUS experience, whereas the intermediate group (n = 14) had completed at least 50 supervised FAST examinations. Both groups underwent assessment on a live human model. Residents from the novice group returned (n = 9) after completing a curriculum and repeated the assessment using the identical experimental construct. RESULTS: Significant differences (p < 0.05) were found between the novice and both the intermediate and the novice returned groups in time, path length, and points of interest (POIs) scanned. Novices required more time to complete the full examination (290.82 seconds vs. 197.41 seconds vs. 271.79 seconds), utilized more motion (9392.07 mm vs. 4052.73 mm vs. 4985.05 mm), and imaged fewer POIs (48.13% vs. 95.00% vs. 100.00%) when compared to intermediates and returning novices, respectively. No difference was found between the intermediate and novice returned groups for the complete examination. Spearman's correlation was calculated between variables within each group. Correlations between time and path length were statistically significant (p < 0.05) with novice, intermediate, and novice returned values of 0.67, 0.65, and 0.90. Interestingly, neither time nor path length consistently correlated with POIs scanned in any group. CONCLUSION: Differences in probe motion efficiency and POIs scanned between novices and intermediate or returning novice users show promise for use as a quantitative objective assessment tool. Unlike in surgical literature, accuracy did not correlate with path length or time to examination completion.

Emergency department point-of-care ultrasound in out-of-hospital and in-ED cardiac arrest.

BACKGROUND: Point-of-care ultrasound has been suggested to improve outcomes from advanced cardiac life support (ACLS), but no large studies have explored how it should be incorporated into ACLS. Our aim was to determine whether cardiac activity on ultrasound during ACLS is associated with improved survival. METHODS: We conducted a non-randomized, prospective, protocol-driven observational study at 20 hospitals across United States and Canada. Patients presenting with out-of-hospital arrest or in-ED arrest with pulseless electrical activity or asystole were included. An ultrasound was performed at the beginning and end of ACLS. The primary outcome was survival to hospital admission. Secondary outcomes included survival to hospital discharge and return of spontaneous circulation. FINDINGS: 793 patients were enrolled, 208 (26.2%) survived the initial resuscitation, 114 (14.4%) survived to hospital admission, and 13 (1.6%) survived to hospital discharge. Cardiac activity on US was the variable most associated with survival at all time points. On multivariate regression modeling, cardiac activity was associated with increased survival to hospital admission (OR 3.6, 2.2-5.9) and hospital discharge (OR 5.7, 1.5-21.9). No cardiac activity on US was associated with non-survival, but 0.6% (95% CI 0.3-2.3) survived to discharge. Ultrasound identified findings that responded to non-ACLS interventions. Patients with pericardial effusion and pericardiocentesis demonstrated higher survival rates (15.4%) compared to all others (1.3%). CONCLUSION: Cardiac activity on ultrasound was the variable most associated with survival following cardiac arrest. Ultrasound during cardiac arrest identifies interventions outside of the standard ACLS algorithm.

Development and Evaluation of a Simulation-based Curriculum for Ultrasound-guided Central Venous Catheterization.

OBJECTIVE: To develop a simulation-based curriculum for residents to learn ultrasound-guided (USG) central venous catheter (CVC) insertion, and to study the volume and type of practice that leads to technical proficiency. METHODS: Ten post-graduate year two residents from the Departments of Emergency Medicine and Anesthesiology completed four training sessions of two hours each, at two week intervals, where they engaged in a structured program of deliberate practice of the fundamental skills of USG CVC insertion on a simulator. Progress during training was monitored using regular hand motion analysis (HMA) and performance benchmarks were determined by HMA of local experts. Blinded assessment of video recordings was done at the end of training to assess technical competence using a global rating scale. RESULTS: None of the residents met any of the expert benchmarks at baseline. Over the course of training, the HMA metrics of the residents revealed steady and significant improvement in technical proficiency. By the end of the fourth session six of 10 residents had faster procedure times than the mean expert benchmark, and nine of 10 residents had more efficient left and right hand motions than the mean expert benchmarks. Nine residents achieved mean GRS scores rating them competent to perform independently. CONCLUSION: We successfully developed a simulation-based curriculum for residents learning the skills of USG CVC insertion. Our results suggest that engaging residents in three to four distributed sessions of deliberate practice of the fundamental skills of USG CVC insertion leads to steady and marked improvement in technical proficiency with individuals approaching or exceeding expert level benchmarks.

Can peripheral venous blood gases replace arterial blood gases in emergency department patients?

OBJECTIVE: To determine if peripheral venous blood gas values for pH, partial pressure of carbon dioxide (Pco(2)) and the resultant calculated bicarbonate (HCO(3)) predict arterial values accurately enough to replace them in a clinical setting. METHODS: This prospective observational study was performed in a university tertiary care emergency department from June to December 1998. Patients requiring arterial blood gas analysis were enrolled and underwent simultaneous venous blood gas sampling. The following data were prospectively recorded: age, sex, presenting complaint, vital signs, oxygen saturation, sample times, number of attempts and indication for testing. Correlation coefficients and mean differences with 95% confidence intervals (CIs) were calculated for pH, Pco(2) and HCO(3). A survey of 45 academic emergency physicians was performed to determine the minimal clinically important difference for each variable. RESULTS: The 218 subjects ranged in age from 15 to 90 (mean 60.4) years. The 2 blood samples were drawn within 10 minutes of each other for 205 (96%) of the 214 patients for whom data on timing were available. Pearson's product-moment correlation coefficients between arterial and venous values were as follows: pH, 0.913; Pco(2), 0.921; and HCO(3), 0.953. The mean differences (and 95% CIs) between arterial and venous samples were as follows: pH, 0.036 (0.030-0.042); Pco(2), 6.0 (5.0-7.0) mm Hg; and HCO(3), 1.5 (1.3-1.7) mEq/L. The mean differences (+/- 2 standard deviations) were greater than the minimum clinically important differences identified in the survey. CONCLUSIONS: Arterial and venous blood gas samples were strongly correlated, and there were only small differences between them. A survey of emergency physicians suggested that the differences are too large to allow for interchangeability of results; however, venous values may be valid if used in conjunction with a correction factor or for trending purposes.