Prehospital Emergency Care最新文献

Objectives: Early hospital transport may benefit out-of-hospital cardiac arrest (OHCA) patients with shockable rhythms who are refractory to defibrillation, particularly in settings with limited advanced on-scene interventions. However, its impact in emergency medical service (EMS) systems with limited advanced cardiac life support (ACLS) capabilities remain unclear. This study aimed to assess the association between intra-arrest transport and survival outcomes in OHCA patients with initial shockable rhythms who remained in refractory shockable rhythms despite the first defibrillation attempt.

Methods: Using a nationwide OHCA registry from a country with an intermediate prehospital service level where interventions such as prehospital anti-arrhythmic drugs or double sequential defibrillation are not feasible, adult medical OHCA patients with initial shockable rhythms who failed the first defibrillation between January 1, 2015, and December 31, 2022 were analyzed. The primary outcome was good neurological recovery. Time-dependent propensity score matching was performed to assess the association between intra-arrest transport and survival outcomes. Risk ratios (RRs) and 95% confidence intervals (CIs) were calculated, and stratified analyses were performed based on matched time intervals after the first defibrillation.

Results: Of 10 246 eligible patients, 8131 underwent intra-arrest transport. After 1:1 time-dependent propensity score matching, 2332 patients each in the intra-arrest transport and on-scene resuscitation groups were included. In the matched cohort, intra-arrest transport was not associated with good neurological recovery (11.7% and 11.5% in the intra-arrest transport and on-scene resuscitation groups, respectively; RR [95% CI] 0.97 [0.91-1.07]). In the stratified analyses based on matched time intervals after the first defibrillation, intra-arrest transport within 5 min after the first defibrillation was associated with poorer neurological outcomes (RR [95% CI] 0.86 [0.77-0.97]).

Conclusions: In an EMS setting with a limited-service level, intra-arrest transport showed no benefit for OHCA patients with an initial shockable rhythm who remained in refractory shockable rhythms despite the first defibrillation attempt. High-quality on-scene management is crucial before the initiation of hospital transport. Further research is needed to develop integrated systems ensuring effective prehospital and hospital care.

Objectives: Motorcycle helmets save lives and reduce serious injury after motorcycle collisions (MCC). In 2022, 18 states had laws requiring helmet use by motorcyclists aged ≥21 years. Our objective was to compare helmet use and head trauma in emergency medical services (EMS) patients involved in MCC in states with and without helmet use laws.

Methods: We conducted an analysis of the 2022 ImageTrend Collaborate national EMS dataset. We included 9-1-1 responses where the patient was a motorcyclist in a transport accident (ICD-10 V20-V29) and aged ≥21 years. Patient demographics, incident urbanicity, helmet use, presence of state helmet use law, patient disposition, Glasgow Coma Scale (GCS) score, and trauma team activations were examined. Our primary outcome of interest was EMS documentation of helmet use (yes/no). Our secondary outcome was the presence of a head injury. We examined EMS-documented head injury, defined using clinician impressions and chief complaint anatomical location. Chi-square tests were used to assess differences in proportions, and a multivariable logistic regression model was used to estimate odds of moderate/severe head injury adjusted for covariates of interest.

Results: A total of 15,891 patient encounters were included, 10,738 (67.6%) occurred in states without helmet use laws. States without helmet use laws had higher proportions of unhelmeted patients (56.8% vs 24.2%, p < 0.001), encounters in non-metro/rural areas (19.7% vs 13.3%, p < 0.001), and GCS-defined moderate/severe head injuries (4.6% vs 2.3%, p < 0.001). In a multivariable model that included 10-yr age groups, sex, race, urbanicity, and documented helmet use, the adjusted odds of moderate/severe head injury were lower for females (0.47, 95%CI, 0.35-0.65) and Black patients (0.47, 95%CI 0.32-0.70), and were higher for incidents in nonmetro/rural areas (1.58, 95%CI 1.28-1.95) and when EMS had not documented helmet use (3.17, 95%CI 2.56-3.92).

Conclusions: In this retrospective cross-sectional study, a higher proportion of patients involved in MCCs in states without helmet laws were not wearing helmets at the time of injury, and unhelemted patients had increased likelihood of sustaining a head injury. EMS agencies in states without helmet laws should prepare their systems and clinicians for an increased incidence of head injuries after MCCs.

Objectives: Paramedic services face increasing challenges due to delays in patient transfer of care (TOC) at emergency departments (EDs). Prolonged TOC times directly impact paramedic services' ability to provide emergency response, though the patient and clinical factors contributing to these delays remain unclear. We examined TOC times for all transports to the ED and analyzed factors associated with prolonged TOC.

Methods: We conducted a retrospective cohort study using paramedic call data from Toronto Paramedic Services from September 1, 2022, to July 31, 2024. We included all paramedic-transported patient records to EDs following a 9-1-1 call, excluding inter-facility transfers and records with missing TOC timestamps. The TOC times were categorized into four intervals: 0-29, 30-59, 60-89, and ≥ 90 min. We conducted a cohort and subgroup analysis of patients aged 60 years or older using multivariable binary logistic regression models to identify factors independently associated with TOC times exceeding 60 min, using odds ratios (OR) with 95% confidence intervals (CI).

Results: A total of 418,196 patients were transported to EDs, of which 214,612 were 60 years or older. Overall, mean TOC was 39.9 min (SD 54.2). Patients aged 0-17 years had the lowest proportion in longer TOC intervals (5% for 60-89 mins; 2% for ≥ 90 mins), while patients 75 years or older had the highest (9%; 9% respectively). A TOC of at least 60 min was independently associated with older age (60 to 74 years OR 1.19, 1.15-1.22; 75 years or greater OR 1.27, 1.23-1.30), medical complexity (seven to eight diagnoses OR 1.15, 1.10-1.20; nine or greater diagnoses OR 1.29, 1.23-1.36), polypharmacy and specific presenting complaints (altered level of consciousness, respiratory distress, general weakness, head trauma). Medical acuity and receiving a paramedic intervention were not associated with prolonged TOC. Similar findings were determined in the subgroup analysis of older adults.

Conclusions: Prolonged TOC times disproportionately affect older or clinically complex patients, regardless of their acuity or need for paramedic intervention. Our findings highlight the importance for paramedic services, hospitals, and stakeholders to develop targeted care models and collaborations to reduce prolonged TOC.

Objectives: To compare the effects of powered and manual stretchers on participants' perceived comfort and measured acceleration during lifting and loading operations.

Methods: This non-randomized, laboratory-based crossover study involved forty-one participants (thirty-one firefighters and ten third-year paramedic students) who served as simulated patients experiencing lifting, lowering, loading, and unloading maneuvers using manual and powered stretchers. Four stretcher types were evaluated: one powered stretcher (Power-PRO^™ XT) and three manual stretchers (Matsunaga GT, Exchange 4070, Scad Mate), with each group using the manual stretcher they routinely operated. Linear acceleration data were collected using a nine-axis inertial measurement unit placed at the participants' anterior waist. Root mean square (RMS) and peak accelerations along the X-, Y-, and Z-axes were calculated. Participants completed a twenty-three-item comfort questionnaire based on the Semantic Differential method. Due to non-normal data distribution, nonparametric statistical tests were employed for analysis.

Results: The lifting/lowering and loading/unloading movements showed that the powered stretcher significantly reduced the RMS values, maximum accelerations, and minimum accelerations in the vertical axis (Z-axis) compared to manual stretchers. Specifically, the powered stretcher demonstrated lower RMS acceleration (0.29 m/s² vs. 0.73 m/s², p < 0.001), maximum acceleration (1.60 m/s² vs. 2.90 m/s², p < 0.001), and minimum acceleration (-1.48 m/s² vs. -3.30 m/s², p < 0.001) in the vertical direction compared to other manual stretchers. Similar results were observed in the comparison of participant loading/unloading movements. However, no significant differences were observed between the powered and Exchange stretchers in X-axis minimum acceleration, Y-axis maximum and minimum accelerations, or Z-axis maximum acceleration. Similarly, Y-axis minimum accelerations did not significantly differ between the powered stretcher and Matsunaga GT or Scad Mate stretchers. After loading and unloading movements, the questionnaire results showed that the powered stretcher was rated significantly higher on comfort-related items including "comfortable," "secure," "like," "smooth," and "relaxing."

Conclusions: In a controlled, laboratory-based setting, simulated use of manual and powered stretchers showed that powered stretchers significantly minimize patient discomfort and vibrations. This study underscores the potential for enhancing patient safety and quality of care. In conclusion, the powered stretcher is a promising tool for improving the quality and safety of patient transportation in prehospital settings.

Objectives: Emergency medical services (EMS) personnel, including EMS physicians, should reflect the diversity of the patient populations they serve to ensure equitable healthcare outcomes. The historical predominance of White male EMS medical directors may contribute to disparities in patient care. Recruiting and training a diverse cadre of EMS fellows is a key step toward fostering equity in EMS leadership and improving outcomes for diverse communities. This study examines demographic trends among EMS fellows and explores their implications for advancing equity in EMS care delivery.

Methods: Publicly available data were extracted from the Accreditation Council for Graduate Medical Education (ACGME) Data Resource Books for the academic years 2012-2013 through 2022-2023. Data regarding residents' and fellows' self-identified gender and race/ethnicity were analyzed for EMS fellowships, emergency medicine (EM) residencies, and all residencies/fellowships. The investigation utilized chi-square tests to analyze associations between categorical variables, such as gender and race, and the Cochran-Armitage Trend Test to evaluate trends in proportions across years.

Results: Data for 680 EMS fellows during the 11-year period were reviewed. Overall, 66% (range 55-78%) of EMS fellows were male and 34% (range 22-45%) were female. There was a smaller proportion of female EMS fellows than female EM residents (37%), female toxicology fellows (39%), female pediatric emergency medicine (PEM) fellows (65%), and female residents overall (45%). The majority of EMS fellows identified as White (75%, range 69-100%). The next most commonly reported race/ethnicity by EMS fellows was Asian (8%, range 0-13%). There was a larger proportion of White EMS fellows than White toxicology fellows (68%), White EM residents (60%), White PEM fellows (49%), and White residents overall (45%). There were no significant trends in gender or race/ethnicity of EMS fellows over time.

Conclusions: Over the first 11 years since fellowship accreditation, one third of EMS fellows were female and more than three quarters of EMS fellows were White. EMS leaders, including fellowship directors, should strengthen the recruitment of women and underrepresented racial and ethnic minority groups in EMS medical direction.

Objectives: Neonates, infants 30 days of age or younger are understudied in prehospital emergencies. Our objective was to describe prehospital assessment and care for patients <30 days of age at the San Diego-Tijuana Point of Entry (POE). Additional objectives included describing assessments, care, frequency, and level of care for newborns brought to the border by Mexican ambulances.

Methods: This was a retrospective analysis from January 1, 2014, to January 01, 2020, of all 9-1-1 calls involving patients <30 days of age at the San Diego POEs. The 9-1-1 responses to newly delivered patients were "newborns". Patients who were not immediately post-delivery were "neonates." Patient demographics, response intervals, clinician interventions, and dispositional data were collected from electronic patient records. Descriptive statistics were applied.

Results: A total of 57 patients <30 days of age were included. With 27 newborn patients, 15 were delivered by emergency medical services (EMS) personnel (27, 55.6%). Initial appearance, pulse, grimace, activity, and respiration (APGAR) scores were 8-10 in 44.4% and 5-7 in 29.6%. Procedures included newborn care (88.9%), advanced life support (ALS) assessment (63.0%), and warming (59.3%). There were five patients that had stimulation, 7 received oxygen, and 3 received Bag-Valve-Mask (BVM) ventilation. No serial heart rates were documented. Regarding 30 neonates, the predominant method of transport to the POE was Mexican ambulance (n 16, 53.3%). Medications administered included oxygen (n 16, 53.3%) and albuterol/ipratropium (n 1, 3.3%). Procedures included ALS assessment (n 19, 63.3%), pulse oximetry (n 22, 73.3%), and 3-lead electrocardiogram (n 8, 26.7%). Three patients (10%) received BVM. Mexican Ambulances brought 16 neonates. A physician or nurse was present in 37.5% of transfers, 50% were incubated, 25% intubated, 37.5% on supplemental oxygen, and 71% had preexisting intravenous access. These were not interfacility transfers but were 9-1-1 activations by U.S. border agents; and 14 neonates did not arrive via Mexican ambulance. Their complaints were respiratory distress (n 7, 50%) and Brief Resolved Unexplained Episode (n 4, 28.6%).

Conclusions: We found that 9-1-1 transports at the San Diego-Tijuana POE for patients <30 days were few and involved resuscitation, neonates in Mexican ambulances with specialized equipment, physicians, and unfamiliar medications. Neonates arriving via private transport had respiratory distress and BRUE.

Objectives: The impact of emergency medical services (EMS) response times when integrating bystanders' automated external defibrillator (AED) use into established response systems remains unclear. This study aims to investigate 30-day survival probabilities for different EMS response times for bystander and non-bystander defibrillated patients and identify for which EMS response times bystander defibrillation improves 30-day survival probability.

Methods: Data on patients with bystander witnessed out-of-hospital-cardiac arrest (OHCAs) with initial shockable rhythm who received bystander cardiopulmonary resuscitation were retrieved from Danish Cardiac Arrest Registry for years 2016-2022. Proportions of 30-day survival were calculated for five intervals of EMS response time for patients who received bystander defibrillation and those who did not. The causal inference framework utilizing targeted maximum likelihood estimation was used to estimate 30-day survival probability for each interval of EMS response time and when comparing cases where bystander defibrillation was performed with those where it was not. This analysis was adjusted for relevant confounding factors and conducted separately for residential and public OHCAs.

Results: The study included 3,924 patients with OHCA. Bystander defibrillation was more frequent in public than in residential OHCAs (64.1% vs. 35.9%). Short EMS response times had higher 30-day survival probability. Bystander defibrillation resulted in higher probability of 30-day survival for EMS response times of 7-9 min (survival ratio 1.24 [95% CI: 1.03; 1.49]) in public OHCAs in the adjusted model, when compared to non-bystander defibrillated patients.

Conclusions: With EMS response times of 7-9 min, we detected a clear 30-day survival benefit for bystander defibrillated patients in public locations. No 30-day survival benefits were seen for other EMS response time intervals or in residential locations.

Objectives: Out-of-hospital births are associated with a 2- to 11-fold increased risk of death compared to in-hospital births and are growing. Emergency Medical Services (EMS) clinicians have limited exposure to hospital birth emergencies, and there is no standardized prehospital neonatal resuscitation curriculum. Neonatal Resuscitation Program (NRP) guidelines are the standard of care for infants born in the United States but focuses on in-hospital births and is not easily applied to EMS. There is a need for tailored NRP training to meet EMS clinicians' specific needs, context, and systems.

Methods: This was a prospective observational study of a virtual EMS-tailored, newborn resuscitation curriculum focused on initial steps of newborn resuscitation in the out-of-hospital setting. The initial content (90-minute) was pilot tested virtually among 350 urban EMS clinicians, with favorable feedback (89% survey response rate). Based on feedback, we created a 60-minute interactive, virtual curriculum that includes NRP-based didactic and memory aids to reinforce how NRP differs from pediatric resuscitation designed specifically for EMS. The course also includes video demonstrations with pauses for hands-on self-directed skills practice. We delivered the curriculum to clinicians from 17 EMS agencies in rural Oregon. To assess neonatal resuscitation knowledge acquisition and retention, participants completed the same 10-question test before, after, and 3 months following the training. Questions were adapted from the 8^th Edition NRP Textbook and NRP test questions.

Results: Eighty-four EMS clinicians completed the pretest, curriculum, and post-test and demonstrated improvement in immediate post-curriculum NRP knowledge (pretest mean score 5.32 ± 1.99; post-test mean score 8.61 ± 1.26; p < 0.001). Forty participants completed the 3-month follow up test and scores remained improved from baseline (3 month-follow up mean score 6.88 ± 1.83, p < 0.001). Prehospital clinicians (N = 84) thought that this EMS-tailored NRP curriculum was easy to complete (100%), valuable to their clinical practice (99%), and filled a gap in their education (98%). They felt that implementing/requiring this training is possible/doable (99%) and recommend the curriculum to other EMS agencies (99%).

Conclusions: A virtual EMS-tailored, NRP-based educational curriculum improved neonatal resuscitation knowledge immediately and was sustained at 3 months compared to baseline. The curriculum is feasible and acceptable to EMS clinicians.

Objectives: Cardiopulmonary resuscitation (CPR), which is used in cases of life-threatening cardiopulmonary arrest, is a physically exhausting procedure. Adding to that, sometimes, even before performing CPR, interventions to rescue the injured person from a challenging environment have caused significant fatigue. In this study, taking a novel research approach, we generated a scenario of fatigue during a rescue from earthquake debris and aimed to measure the effect of that fatigue on the quality of CPR performed by paramedics.

Methods: The research followed an experimental design with 2 groups (experimental/control) and 2 measurements (pretest/post-test). The study population was selected using power analysis. The sample, consisting of 84 paramedic students, was randomly divided into 42 control and 42 experimental participants. Current American Heart Association (AHA 2020) and European Resuscitation Council (ERC 2021) guidelines were strictly followed when performing CPR. In order to assess the accuracy of CPR, a General Doctor GD-CPR200S-A (2010 standard) simulator was utilized. The participants were fatigued by practicing the process of extracting and transporting earthquake victims from rubble. A personal information form with 20 questions and a CPR measurement form were used to obtain the data.

Results: In the analysis performed to measure the differences between the CPR indicators for the control and experimental groups in the post-test and pretest, the difference in compression (control: 6.5 ± 50.1 and experimental: -10.3 ± 46.0) was not significant. Meanwhile, we found that the difference in ventilation (control: 0.3 ± 5.4 vs. experiment: 8.1 ± 4.6) and the difference in CPR completion times (control: 0.2 ± 1.2 vs. experiment: -0.7 ± 0.7) between the post-test and pretest were significant.

Conclusions: There was no significant difference in correct compressions between the control and experimental groups, but there was a significant difference in ventilation and CPR completion times. For this reason, it is recommended to focus on the effect of fatigue on CPR quality, especially on the ventilation process. It is also recommended to include fatigue scenarios in CPR trainings.

Objectives: Low titer O⁺ whole blood (LTO+WB) has been shown to improve outcomes in trauma patients and use is increasingly common. Studies on prehospital use and efficacy have been published throughout the literature, but few of these fully address the risks of transfusion reactions and other side effects. The focus of this study is to look at prehospital LTO+WB transfusions in trauma patients and review for transfusion reactions.

Methods: This was a retrospective review of consecutive trauma patients who received prehospital LTO+WB over a 4.5-year period. We used EMS agency transfusion records and institutional blood bank data from two urban level I trauma centers for records on blood transfusion reactions. Excluded from the study were patients declared dead on arrival to the hospital, patients transfused for non-traumatic complaints, patients for whom hospital records were unavailable, and any transfusion reaction that occurred more than 10 days after the prehospital transfusion. Descriptive statistics were used for data analysis.

Results: Of 1126 prehospital transfusions 572 met inclusion criteria. There were 2 (0.35%) suspected transfusion reactions, none of which were determined to be hemolytic reactions. There was 1 febrile non-hemolytic reaction on hospital day 1 and there was 1 allergic reaction with hives and shortness of breath that occurred on hospital day 1.

Conclusions: Prehospital LTO+WB is safe to use and has a similar rate of transfusion reaction as when given in-hospital. Concerns about transfusion reactions caused by LTO+WB should not preclude its use prehospital. Regardless of the low incidence of transfusion reactions, prehospital personnel should be trained in their recognition and management. Limitations include retrospective study design and the inability to distinguish transfusion reactions from prehospital LTO+WB versus reaction to blood products transfused at the trauma center.