EMS responses and non-transports during the COVID-19 pandemic.

INTRODUCTION: The COVID-19 pandemic may affect both use of 9-1-1 systems and prehospital treatment and transport practices. We evaluated EMS responses in an EMS region when it experienced low to moderate burden of COVID-19 disease to assess overall trends, response and management characteristics, and non-transport rates. Our goal is to inform current and future pandemic response in similar regions. METHODS: We performed a retrospective review of prehospital EMS responses from 22 urban, suburban, and rural EMS agencies in Western Pennsylvania. To account for seasonal variation, we compared demographic, response, and management characteristics for the 2-month period of March 15 to May 15, 2020 with the corresponding 2-month periods in 2016-2019. We then tested for an association between study period (pandemic vs historical control) and incidence of non-transport in unadjusted and adjusted regression. Finally, we described the continuous trends in responses and non-transports that occurred during the year before and initial phase of the COVID-19 pandemic from January 1, 2019 to May 31, 2020. RESULTS: Among 103,607 EMS responses in the 2-month comparative periods of March 15 to May 15, 2016-2020, we found a 26.5% [95% CI 26.9%, 27.1%] decrease in responses in 2020 compared to the same months from the four prior years. There was a small increase in respiratory cases (0.6% [95%CI 0.1%, 1.1%]) and greater frequency of abnormal vital signs suggesting a sicker patient cohort. There was a relative increase (46.6%) in non-transports between periods. The pandemic period was independently associated with an increase in non-transport (adjusted OR 1.68; 95%CI 1.59, 1.78). Among 177,194 EMS responses occurring in the year before and during the early period of the pandemic, between January 1, 2019, and May 31, 2020, we identified a 31% decrease in responses and a 48% relative increase in non-transports for April 2020 compared to the previous year's monthly averages. CONCLUSION: Despite a low to moderate burden of infection during the initial period of the COVID-19 pandemic, we found a decline in overall EMS response volumes and an increase in the rate of non-transports independent of patient demographics and other response characteristics.

The 2019 Core Content of Emergency Medical Services Medicine.

On March 13, 2019 the EMS Examination Committee of the American Board of Emergency Medicine (ABEM) approved modifications to the Core Content of EMS Medicine. The Core Content is used to define the subspecialty of EMS Medicine, provides the basis for questions to be used during written examinations, and leads to development of a certification examination blueprint. The Core Content defines the universe of knowledge for the treatment of prehospital patients that is necessary to practice EMS Medicine. It informs fellowship directors and candidates for certification of the full range of content that might appear on certification examinations.

A comparative assessment of adverse event classification in the out-of-hospital setting.

OBJECTIVES: We sought to test reliability of two approaches to classify adverse events (AEs) associated with helicopter EMS (HEMS) transport. METHODS: The first approach for AE classification involved flight nurses and paramedics (RN/Medics) and mid-career emergency physicians (MC-EMPs) independently reviewing 50 randomly selected HEMS medical records. The second approach involved RN/Medics and MC-EMPs meeting as a group to openly discuss 20 additional medical records and reach consensus-based AE decision. We compared all AE decisions to a reference criterion based on the decision of three senior emergency physicians (Sr-EMPs). We designed a study to detect an improvement in agreement (reliability) from fair (kappa = 0.2) to moderate (kappa = 0.5). We calculated sensitivity, specificity, percent agreement, and positive and negative predictive values (PPV/NPV). RESULTS: For the independent reviews, the Sr-EMP group identified 26 AEs while individual clinician reviewers identified between 19 and 50 AEs. Agreement on the presence/absence of an AE between Sr-EMPs and three MC-EMPs ranged from κ = 0.20 to κ = 0.25. Agreement between Sr-EMPs and three RN/Medics ranged from κ = 0.11 to κ = 0.19. For the consensus/open-discussion approach, the Sr-EMPs identified 13 AEs, the MC-EMP group identified 18 AEs, and RN/medic group identified 36 AEs. Agreement between Sr-EMPs and MC-EMP group was (κ = 0.30 95%CI -0.12, 0.72), whereas agreement between Sr-EMPs and RN/medic group was (κ = 0.40 95%CI 0.01, 0.79). Agreement between all three groups was fair (κ = 0.33, 95%CI 0.06, 0.66). Percent agreement (58-68%) and NPV (63-76%) was moderately dissimilar between clinicians, while sensitivity (25-80%), specificity (43-97%), and PPV (48-83%) varied. CONCLUSIONS: We identified a higher level of agreement/reliability in AE decisions utilizing a consensus-based approach for review rather than independent reviews.

Measuring adverse events in helicopter emergency medical services: establishing content validity.

INTRODUCTION: We sought to create a valid framework for detecting adverse events (AEs) in the high-risk setting of helicopter emergency medical services (HEMS). METHODS: We assembled a panel of 10 expert clinicians (n = 6 emergency medicine physicians and n = 4 prehospital nurses and flight paramedics) affiliated with a large multistate HEMS organization in the Northeast US. We used a modified Delphi technique to develop a framework for detecting AEs associated with the treatment of critically ill or injured patients. We used a widely applied measure, the content validity index (CVI), to quantify the validity of the framework's content. RESULTS: The expert panel of 10 clinicians reached consensus on a common AE definition and four-step protocol/process for AE detection in HEMS. The consensus-based framework is composed of three main components: (1) a trigger tool, (2) a method for rating proximal cause, and (3) a method for rating AE severity. The CVI findings isolate components of the framework considered content valid. CONCLUSIONS: We demonstrate a standardized process for the development of a content-valid framework for AE detection. The framework is a model for the development of a method for AE identification in other settings, including ground-based EMS.

Use of therapeutic hypothermia after in-hospital cardiac arrest.

OBJECTIVES: Formal guidelines recommend that therapeutic hypothermia be considered after in-hospital cardiac arrest. The rate of therapeutic hypothermia use after in-hospital cardiac arrest and details about its implementation are unknown. We aimed to determine the use of therapeutic hypothermia for adult in-hospital cardiac arrest, whether use has increased over time, and to identify factors associated with its use. DESIGN: Multicenter, prospective cohort study. SETTING: A total of 538 hospitals participating in the Get With the Guidelines-Resuscitation database (2003-2009). PATIENTS: A total of 67,498 patients who had return of spontaneous circulation after in-hospital cardiac arrest. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: The primary outcome was the initiation of therapeutic hypothermia. We measured the proportion of therapeutic hypothermia patients who achieved target temperature (32-34 °C) and were overcooled. Of 67,498 patients, therapeutic hypothermia was initiated in 1,367 patients (2.0%). The target temperature (32-34 °C) was not achieved in 44.3% of therapeutic hypothermia patients within 24 hours and 17.6% were overcooled. The use of therapeutic hypothermia increased from 0.7% in 2003 to 3.3% in 2009 (p < 0.001). We found that younger age (p < 0.001) and occurrence in a non-ICU location (p < 0.001), on a weekday (p = 0.005), and in a teaching hospital (p = 0.001) were associated with an increased likelihood of therapeutic hypothermia being initiated. CONCLUSIONS: After in-hospital cardiac arrest, therapeutic hypothermia was used rarely. Once initiated, the target temperature was commonly not achieved. The frequency of use increased over time but remained low. Factors associated with therapeutic hypothermia use included patient age, time and location of occurrence, and type of hospital.

Multivariate analysis of successful intravenous line placement in the prehospital setting.

BACKGROUND: Intravenous (IV) line placement is an important prehospital advanced life support skill, but IV success rates are variable among providers. Little is known about what factors are associated with successful IV placement, limiting the ability to develop benchmarks for skill maintenance, such as requiring a specific number of IV placements per year. OBJECTIVE: We aimed to identify whether first-pass IV success was associated with the number of attempted or successful previous IV attempts. We hypothesized that IV success is associated with the number of successful IV placements in the preceding year. METHODS: We retrospectively studied 800 consecutive charts with an IV attempt from 11 suburban and rural emergency medical services (EMS) agencies over a one-month period. Cases involving pediatric patients (age <18 years) and those with incomplete data were excluded. Success of the first IV attempt was identified. Potential predictor variables were collected and analyzed by univariate logistic regression, including patient age, systolic blood pressure, history of IV drug abuse or renal disease, traumatic event, catheter size, and location of IV attempt, as well as the individual provider's numbers of total and successful IV attempts in the preceding year. Variables significantly associated with IV success at the p < 0.10 level were included in a multivariate regression model using a p-value of 0.05. RESULTS: Of 602 cases meeting the study criteria, 469 (77.9%) had a successful first-pass IV placement. Significantly associated with IV success in the univariate regression were patient age (p = 0.054), trauma (p = 0.074), IV catheter size (p < 0.001), IV location (p = 0.056), and the number of previous successful IV attempts (p = 0.039), whereas the number of total previous IV attempts was not significantly associated (p = 0.871). In the multivariate logistic regression model, only IV catheter size had a significant association (p < 0.001), with a larger-bore IV catheter size associated with higher success. CONCLUSION: In this retrospective study, larger IV catheter size, but not the prehospital providers' previous year's experience, was associated with successful IV placement in adult patients. These data fail to support requirements for a minimum number of yearly IV placements by full-time paramedics to improve success rates.

Validation of a Simulation-Based Resuscitation Curriculum for Maternal Cardiac Arrest.

OBJECTIVE: To assess the knowledge, skills, and self-efficacy of health care participants completing a simulation-based blended learning training curriculum on managing maternal medical emergencies and maternal cardiac arrest (Obstetric Life Support). METHODS: A formative assessment of the Obstetric Life Support curriculum was performed with a prehospital cohort comprising emergency medical services professionals and a hospital-based cohort comprising health care professionals who work primarily in hospital or urgent care settings and respond to maternal medical emergencies. The training consisted of self-guided precourse work and an instructor-led simulation course using a customized low-fidelity simulator. Baseline and postcourse assessments included multiple-choice cognitive test, self-efficacy questionnaire, and graded Megacode assessment of the team leader. Megacode scores and pass rates were analyzed descriptively. Pre- and post-self-confidence assessments were compared with an exact binomial test, and cognitive scores were compared with generalized linear mixed models. RESULTS: The training was offered to 88 participants between December 2019 and November 2021. Eighty-five participants consented to participation; 77 participants completed the training over eight sessions. At baseline, fewer than half of participants were able to achieve a passing score on the cognitive assessment as determined by the expert panel. After the course, mean cognitive assessment scores improved by 13 points, from 69.4% at baseline to 82.4% after the course (95% CI 10.9-15.1, P <.001). Megacode scores averaged 90.7±6.4%. The Megacode pass rate was 96.1%. There were significant improvements in participant self-efficacy, and the majority of participants (92.6%) agreed or strongly agreed that the course met its educational objectives. CONCLUSION: After completing a simulation-based blended learning program focused on managing maternal cardiac arrest using a customized low-fidelity simulator, most participants achieved a defensible passing Megacode score and significantly improved their knowledge, skills, and self-efficacy.

The core content of emergency medical services medicine.

On September 23, 2010, the American Board of Medical Specialties (ABMS) approved emergency medical services (EMS) as a subspecialty of emergency medicine. As a result, the American Board of Emergency Medicine (ABEM) is planning to award the first certificates in EMS medicine in the fall of 2013. The purpose of subspecialty certification in EMS, as defined by ABEM, is to standardize physician training and qualifications for EMS practice, to improve patient safety and enhance the quality of emergency medical care provided to patients in the prehospital environment, and to facilitate integration of prehospital patient treatment into the continuum of patient care. In February 2011, ABEM established the EMS Examination Task Force to develop the Core Content of EMS Medicine (Core Content) that would be used to define the subspecialty and from which questions would be written for the examinations, to develop a blueprint for the examinations, and to develop a bank of test questions for use on the examinations. The Core Content defines the training parameters, resources, and knowledge of the treatment of prehospital patients necessary to practice EMS medicine. Additionally, it is intended to inform fellowship directors and candidates for certification of the full range of content that might appear on the examinations. This article describes the development of the Core Content and presents the Core Content in its entirety.

Resident field response in an emergency medicine prehospital care rotation.

BACKGROUND: Emergency medical services (EMS) is an important component of emergency medicine residency curricula. For over 20 years, residents at a university-affiliated program have staffed a physician response vehicle and responded to selected calls in an urban EMS system with online faculty backup. OBJECTIVES: To describe the prehospital educational experience and patient care provided through this unique program and to assess residents' perceptions. METHODS: This was a three-year retrospective study of patient care records for all prehospital resident responses. Information obtained included complaint, disposition, procedures performed, and medications administered. The number of EMS radio consultations provided by residents during this rotation was also sought. We surveyed 43 current and recently graduated residents to assess their perceptions of this experience. RESULTS: Residents treated 1,434 patients during 1,381 scene responses (16.7 field patient contacts per resident-year). Complaints included cardiac arrest (788, 55.0%) and neurologic (230, 16.0%), traumatic (194, 13.5%), respiratory (144, 10.0%), and other cardiac (40, 2.8%) emergencies. Most patients (1,022; 71.3%) were transported to the hospital, including 82 of 143 patients (57.3%) who initially refused EMS transport. Residents performed procedures on 546 responses (39.5%), including 123 successful intubations, 115 central lines, 43 peripheral (IV) lines, and 10 intraosseous lines. EMS radio consultation records were available for only the second half of the study period. Residents provided 11,583 consultations during this one-and-a-half-year period (264 radio consultations per resident-year). Of the 40 returned surveys (93.0%), autonomy (n = 21), medical decision making (n = 10), and management of high-acuity patients (n = 7) were the most important perceived benefits of this program. CONCLUSION: Our prehospital training program incorporates emergency medicine residents as in-field physicians and allows hands-on opportunity to provide patient care for a variety of conditions in the EMS environment, as well as extensive experience in online medical direction. The trainees believed it had a strong positive impact on their acquisition of important emergency medicine abilities.

Essential features of designating out-of-hospital cardiac arrest as a reportable event: a scientific statement from the American Heart Association Emergency Cardiovascular Care Committee; Council on Cardiopulmonary, Perioperative, and Critical Care; Council on Cardiovascular Nursing; Council on Clinical Cardiology; and Quality of Care and Outcomes Research Interdisciplinary Working Group.

The 2010 impact goal of the American Heart Association is to reduce death rates from heart disease and stroke by 25% and to lower the prevalence of the leading risk factors by the same proportion. Much of the burden of acute heart disease is initially experienced out of hospital and can be reduced by timely delivery of effective prehospital emergency care. Many patients with an acute myocardial infarction die from cardiac arrest before they reach the hospital. A small proportion of those with cardiac arrest who reach the hospital survive to discharge. Current health surveillance systems cannot determine the burden of acute cardiovascular illness in the prehospital setting nor make progress toward reducing that burden without improved surveillance mechanisms. Accordingly, the goals of this article provide a brief overview of strategies for managing out-of-hospital cardiac arrest. We review existing surveillance systems for monitoring progress in reducing the burden of out-of-hospital cardiac arrest in the United States and make recommendations for filling significant gaps in these systems, including the following: 1. Out-of-hospital cardiac arrests and their outcomes through hospital discharge should be classified as reportable events as part of a heart disease and stroke surveillance system. 2. Data collected on patients' encounters with emergency medical services systems should include descriptions of the performance of cardiopulmonary resuscitation by bystanders and defibrillation by lay responders. 3. National annual reports on key indicators of progress in managing acute cardiovascular events in the out-of-hospital setting should be developed and made publicly available. Potential barriers to action on cardiac arrest include concerns about privacy, methodological challenges, and costs associated with designating cardiac arrest as a reportable event.

Inter-association task force recommendations on emergency preparedness and management of sudden cardiac arrest in high school and college athletic programs: a consensus statement.

OBJECTIVE: To assist high school and college athletic programs prepare for and respond to a sudden cardiac arrest (SCA). This consensus statement summarizes our current understanding of SCA in young athletes, defines the necessary elements for emergency preparedness, and establishes uniform treatment protocols for the management of SCA. BACKGROUND: Sudden cardiac arrest is the leading cause of death in young athletes. The increasing presence of and timely access to automated external defibrillators (AEDs) at sporting events provides a means of early defibrillation and the potential for effective secondary prevention of sudden cardiac death. An Inter-Association Task Force was sponsored by the National Athletic Trainers' Association to develop consensus recommendations on emergency preparedness and management of SCA in athletes. RECOMMENDATIONS: Comprehensive emergency planning is needed for high school and college athletic programs to ensure an efficient and structured response to SCA. Essential elements of an emergency action plan include establishing an effective communication system, training of anticipated responders in cardiopulmonary resuscitation and AED use, access to an AED for early defibrillation, acquisition of necessary emergency equipment, coordination and integration of onsite responder and AED programs with the local emergency medical services system, and practice and review of the response plan. Prompt recognition of SCA, early activation of the emergency medical services system, the presence of a trained rescuer to initiate cardiopulmonary resuscitation, and access to early defibrillation are critical in the management of SCA. In any collapsed and unresponsive athlete, SCA should be suspected and an AED applied as soon as possible for rhythm analysis and defibrillation if indicated.

The role of law enforcement agencies in out-of-hospital emergency care.

BACKGROUND: A key component of out-of-hospital emergency care is the rapid response of trained providers with appropriate medical equipment. In some communities, law enforcement agents function as first responders to accomplish this goal. The purpose of this national survey was to assess the proportion of law enforcement agencies that provide medical care to determine the extent of care they provide, to identify how many use AEDs, and to assess the attitudes of agency leaders regarding their roles as medical first responders. METHODS: Eight hundred agencies were selected at random from a national database of 43,000 agencies available through the National Public Safety Bureau (Stevens Pt, WI). These agencies were sent a 19-question survey either by US mail or telephone. RESULTS: Four-hundred and fifty-four (57%) surveys were returned, and 420 (53%) were available for use after exclusion criteria were applied. Eighty percent of law enforcement agencies respond routinely to medical emergencies and 39% of these reported they deploy AEDs. Thirty-one percent of all law enforcement agencies are equipped with AEDs, a ten-fold increase from 2.6% reported in a previous national study in 1997. Funding issues were the most common reasons cited for not using AEDs. Approximately 75% of respondents agreed that law enforcement agencies should provide initial emergency medical care and indicated that officers in their agency would be willing to receive additional training to accomplish this. CONCLUSION: Based on this survey, law enforcement agents often serve as medical first responders. Nearly three quarters of responding agencies felt this role was appropriate. AEDs are now deployed much more frequently than indicated by a previous national study, but still less than one-third of law enforcement agencies carry AEDs as part of their standard response equipment.

Characteristics of volunteers responding to emergencies in the Public Access Defibrillation Trial.

OBJECTIVES: To evaluate the characteristics of volunteers responding to emergencies in the North American Public Access Defibrillation (PAD) Trial. METHODS: The PAD Trial was a prospective evaluation of cardiac arrest survival in community facilities randomized to cardiopulmonary resuscitation (CPR) or to CPR with automated external defibrillators (AEDs). The PAD volunteers' characteristics were analyzed using Poisson regression clustered on the facility and offset by the number of emergency episodes to which volunteers were exposed. RESULTS: A total of 19,320 volunteers in 1260 facilities were trained to provide emergency care. Of these, 8169 volunteers were participating actively at their facility during a time when one or more emergency episodes occurred. There were 1971 emergency episodes responded to by 1245 volunteers. The treatment arm (CPR-only versus CPR+AED) was not associated with the likelihood of volunteer participation in an episode. Likewise, the volunteers' age or sex did not affect response. Volunteers more likely to respond were supervisory/management or security personnel, non-minority participants, volunteers with previous CPR training, volunteers with previous experience in emergency care and those who passed the PAD CPR skills follow-up test. Volunteers who had a formal education beyond a high school level were less likely to respond. CONCLUSIONS: Volunteers with previous emergency training and positions of responsibility in their facility had a greater likelihood of participation in medical emergencies in the PAD Trial.

Stress reactions and perceived difficulties of lay responders to a medical emergency.

BACKGROUND: Bystander CPR rates remain low. One reason may be that the thought of responding to an emergency is so stressful that it decreases the willingness of laypersons to respond. PURPOSE: The purpose of this study was to quantify the amount of stress experienced by lay responders to a medical emergency and to identify barriers that may have impeded their response to the event. METHODS: Responses from 1243 laypersons responding to an emergency during the Public Access Defibrillation Trial were analyzed in a mixed methods study. Stress related to the event was recorded using a 0 (none) to 5 (severe) scale. Qualitative responses to the question of "What was most difficult?" about the event were analyzed using content analysis. RESULTS: Reported stress levels were low overall (mean 1.2, median 1.0). Laypersons responding to an emergency presumed to be a cardiac arrest had higher stress than those involved in other events (median 2.0 versus 1.0). Stress levels were higher in residential than in public settings (mean 1.41, median 1.0 versus mean 1.13, median 1.0). Those who fit a certain profile (females, non-native English speakers) reported statistically higher stress levels than others. A total of 614 qualitative responses were studied and aggregated into four major categories of difficulty: practical issues; characteristics of the victim; interpersonal issues; thoughts and feelings of the lay responder. Most difficulties were in the category of practical issues. CONCLUSIONS: Among these study volunteer lay responders, low levels of stress were reported. Incorporating descriptions of the difficulties experienced by lay responders in CPR/AED training curricula may make courses more realistic and useful.

Compound risk: History of traumatic stress predicts posttraumatic stress disorder symptoms and severity in sudden cardiac arrest survivors.

BACKGROUND: Sudden cardiac arrest (SCA) survivors can develop posttraumatic stress disorder (PTSD) which is associated with worse clinical outcomes. The purpose of this study was to evaluate the prevalence and predictors of PTSD in a large sample of SCA survivors. Prior history of psychological trauma and the effects of repeated trauma exposure on subsequent PTSD and symptom severity after SCA were also explored. METHODS: A retrospective, cross-sectional study of 188 SCA survivors from the Sudden Cardiac Arrest Association patient registry completed an online questionnaire that included measures of PTSD, trauma history, sociodemographics, general health, and cardiac history. RESULTS: Sixty-three (36.2%) SCA survivors in this sample scored above the clinical cutoff for PTSD. Female gender, worse general health, and younger age predicted PTSD symptoms after SCA. Additionally, 50.2% of SCA survivors (n = 95) reported a history of trauma exposure and 25.4% (n = 48) of the total sample endorsed a traumatic stress response to a historic trauma. Results indicated that a traumatic stress response to a historic trauma was a stronger predictor of PTSD after SCA (odds ratio = 4.77) than all other variables in the model. CONCLUSIONS: PTSD symptoms are present in over one-third of SCA survivors. While demographic or health history variables predicted PTSD after SCA, a history of traumatic stress response to a previous trauma emerged as the strongest predictor of these symptoms. Routine assessment and interdisciplinary management are discussed as potential ways to expedite survivors' recovery and return to daily living.