Epinephrine use and outcomes in anaphylaxis patients transported by emergency medical services.

BACKGROUND: Anaphylaxis is a potentially life-threatening allergic reaction that may require emergency medical system (EMS) transport. Fatal anaphylaxis is associated with delayed epinephrine administration. Patient outcome data to assess appropriateness of EMS epinephrine administration are sparse. OBJECTIVES: The objectives of this study are to (1) determine the frequency of epinephrine administration in EMS-transported patients with allergic complaints, (2) identify predictors of epinephrine administration, and (3) determine frequency of emergency department (ED) epinephrine administration after EMS transport. METHODS: A cohort study was conducted from over 5 years. A total of 59187 EMS transports of an Advanced Life Support (ALS) ambulance service were studied. RESULTS: One hundred and three patient transports for allergic complaints were analyzed. Fifteen patients received EMS epinephrine, and epinephrine was recommended for 2 additional patients who refused, for a total of 17 (17%) patients for whom epinephrine was administered or recommended. Emergency medical system epinephrine administration or recommendation was associated with venom as a trigger (29% vs 8%; odds ratio [OR], 4.70; 95% confidence interval [CI], 1.28-17.22; P = .013), respiratory symptoms (88% vs 52%; OR, 6.83; 95% CI, 1.47-31.71; P = .006), and fulfillment of anaphylaxis diagnostic criteria (82% vs 49%; OR, 3.50; 95% CI, 0.94-13.2; P = .0498). Four (4%) patients received epinephrine after ED arrival. CONCLUSION: Low rates of epinephrine administration were observed. The association of EMS administration of epinephrine with respiratory symptoms, fulfillment of anaphylaxis diagnostic criteria, and low rate of additional epinephrine administration in the ED suggest that ALS EMS administered epinephrine based on symptom severity. Additional studies of EMS anaphylaxis management including ED management and outcomes are needed.

Appropriate and safe utilization of helicopter emergency medical services: a joint position statement with resource document.

This position statement with accompanying resource document is the result of a collaborative effort of a writing group comprised of members of the Air Medical Physician Association (AMPA), the American College of Emergency Physicians (ACEP), the National Association of EMS Physicians (NAEMSP), and the American Academy of Emergency Medicine (AAEM). This document has been jointly approved by the boards of all four organizations. Patients benefit from the appropriate utilization of helicopter emergency medical services (HEMS). EMS and regional health care systems must have and follow guidelines for HEMS utilization to facilitate proper patient selection and ensure clinical benefit. Clinical benefit can be provided by Meaningfully shortening the time to delivery of definitive care to patients with time-sensitive medical conditions Providing necessary specialized medical expertise or equipment to patients before and/or during transport Providing transport to patients inaccessible by other means of transport The decision to use HEMS is a medical decision, separate from the aviation determination whether a transport can be completed safely. Physicians with specialized training and experience in EMS and air medical transport must be integral to HEMS utilization decisions, including guideline development and quality improvement activities. Safety management systems must be developed, adopted, and adhered to by air medical operators when making decisions to accept and continue every HEMS transport. HEMS must be fully integrated within the local, regional, and state emergency health care systems. HEMS programs cannot operate independently of the surrounding health care environment. The EMS and health care systems must be involved in the determination of the number of HEMS assets necessary to provide appropriate coverage for their region. Excessive resources may lead to competitive practices that can affect utilization and negatively impact safety. Inadequate resources will delay receipt of definitive care. National guidelines for appropriate utilization of HEMS must be developed. These guidelines should be national in scope yet allow local, regional, and state implementation. A National HEMS Agenda for the Future should be developed to address HEMS utilization and availability and to identify and support a research strategy for ongoing, evidence-based refinement of utilization guidelines.

Effect of an onboard event recorder and a formal review process on ambulance driving behaviour.

BACKGROUND: Onboard event recorders in vehicles record external and internal video before and after when preset g-force limits are exceeded. The use of these recorders in a fleet of ambulances, along with formal review, may decrease the number of unsafe driving events. The aim of this study was to evaluate the number of driving events since the inception of DriveCam technology in a fleet. METHODS: 54 vehicles were outfitted with DriveCam event recorders in 2003. Events were captured and assigned a categorical severity score of 1-4 (1 being the lowest severity) when the vehicle exceeded preset g-force limits. An event was assigned a score of 'good' if the review determined that the driver demonstrated good judgement. A review and feedback process was implemented in August 2006 and analysed through June 2008. RESULTS: During the study period, 2 979 891 miles were driven for 115 019 ambulance responses, with 6009 events captured. Events were categorised as follows: 2008 (33.4%) level 1; 3726 (62.0%) level 2; 175 (2.9%) level 3; 3 (0.05%) level 4; and 97 (1.6%) good events. The proportion of all events per mile and all events per response decreased over time with use of the recorder and review and feedback. CONCLUSIONS: The institution of video event recorder technology along with formal review and feedback resulted in a change in driving behaviour. Given that call volumes increased and driving events decreased, these measures may serve as surrogates for improvements in safety and maintenance costs. Economic analysis is necessary for conclusions on fiscal impact.

Evolution of a community-wide early defibrillation programme experience over 13 years using police/fire personnel and paramedics as responders.

BACKGROUND: In November 1990, a 2-year trial period was initiated in which police officers in the city of Rochester, Minnesota, were trained in the operation of automated external defibrillators (AEDs). Following the trial, the program was expanded as the city grew in population and area. In 1998 firefighters also were equipped with AEDs, bringing to a total 18 AEDs with police and fire personnel, in addition to paramedic capability. METHODS: From November 1990 to December 2003, all adult patients with atraumatic cardiac arrest with ventricular fibrillation (VF) as the presenting rhythm were included for analysis. Call-to-shock time intervals, restoration of spontaneous circulation after defibrillation shocks only (without need for vasoactive or inotropic drug administration), and neurologically intact survival (overall performance category (OPC) 1 or 2) were study end-points. RESULTS: One hundred and ninety-three patients presented in VF. Of these, 80 (41%) were discharged neurologically intact. Of the 159 VF patients whose arrest was bystander-witnessed 73 (46%) were discharged. Survival from non-VF arrest was very low (5%). Assessment of VF survivors demonstrated a quality of life, adjusted for age, gender, and disease, similar to that of the general population. CONCLUSIONS: These data demonstrate that a relatively high survival can be obtained in a city of this size and area employing a non-tiered community-wide approach within the emergency medical services (EMS) system.

Emergency medical service aspects of emergency cardiac care.

Prehospital intervention has the potential for significantly affecting the outcome of cardiovascular emergencies. The authors examine multiple issues in prehospital care that can streamline and improve cardiac care. Improving access to prehospital care and increasing the use of the emergency medical services (EMS) system can speed interventions to the patients. The use of ECG in the out-of-hospital setting can reduce time to definitive treatment. Issues, such as the use of public access defibrillation and interfacility transports are also discussed.

Overview, prevention, and treatment of rabies.

Rabies is a uniformly fatal viral encephalitis that causes 30,000 to 70,000 deaths worldwide each year. Prevention is the primary approach to the disease. In the United States, 25,000 to 40,000 people are treated annually for exposure to rabid or potentially rabid animals at a per-patient cost exceeding 1000 dollars. Rabies is transmitted usually by saliva from infected animal bites. However, recent findings that rabies can be transmitted from bats to humans by relatively casual contact has resulted in dramatic changes in guidelines from the Centers for Disease Control and Prevention for postexposure prophylaxis. We review the 5 clinical stages of rabies, current methods of diagnosis, and prevention in animal reservoirs and in humans. We also discuss the use of rabies immune globulin and active and passive vaccinations for preexposure prophylaxis and postexposure treatment of rabies. Human exposure to rabies will always be a possibility, but methods to prevent the disease both before and after exposure to the virus are safe and readily available.

Efficacy and compliance of a prehospital spinal immobilization guideline.

BACKGROUND: Prehospital spinal immobilization criteria are useful in identifying those at risk for spinal fractures, while reducing the number of patients unnecessarily immobilized. The use of immobilization criteria, without regard to mechanism of injury, has been shown to accomplish this task. AIMS: The study's purpose is to examine efficacy of a prehospital spinal clearance guideline and triage/management of these injuries. METHODS: This was a retrospective study of traumatically injured patients based on a clinical clearance spinal immobilization guideline between January 2006 and January 2007. Two gold standards were used in the analysis (radiographic findings and physician clearance without radiographs). This project was approved by the Mayo Clinic Institutional Review Board. RESULTS: The study included 942 patients documented to have a traumatic injury. Of these, 43 (4.6%) had an acute spinal fracture. The guideline allowed 558 (59.2%) patients to be cleared, and 1.3% (7/558) had fractures. The remaining 384 did not meet clearance criteria and accounted for 36 (9.4%, 36/384) fractures. The guideline correctly predicted 36 of 43 fractures. The median age of the 7 fractures not immobilized was 82 years and of the 36 patients with fractures that were immobilized was 48 years. When immobilization was indicated, caregivers were 77.6% (298/384) compliant. Of the noncompliant 22.4% (86/384) there were 9 fractures. CONCLUSIONS: This spinal guideline demonstrates efficacy in identifying those at risk for spinal fractures. An age extreme criteria may enhance this already effective guideline. Further analysis of compliance failures may improve the guideline's ability for fracture prediction.

Air medical transport of trauma patients.

This report reviews the current status of air medical transportation of trauma patients. Aspects reviewed include patient care, dispatch, safety, and possible future directions in air medical patient care.

Use of the autolaunch method of dispatching a helicopter.

INTRODUCTION: Autolaunch is a method of dispatching whereby the dispatcher can send the helicopter to a scene, as opposed to traditional request-driven dispatch. The purpose of this study was to investigate differences in patient outcomes when autolaunch was used. A 2-year period, July 1997 through June 1999, was studied. METHODS: A case control design was used. A retrospective chart review included 17 autolaunch and 16 traditionally dispatched patients. Patients were matched using Injury Severity Scores, Glasgow Coma Scale, and age. Eight matched pairs were used for statistical analysis. Three research questions were answered. RESULTS: The difference in time from accident to helicopter arrival was 3.64 minutes faster for autolaunch (statistical significance P =.336). Mortality data showed no statistical significance difference (P =.302). Intensive care unit (ICU) and hospital length of stays were both decreased with the use of autolaunch, although not statistically significantly. DISCUSSION: Sample size was small, making statistical significance difficult to achieve despite decreased length of stays and quicker time to the scene. CONCLUSION: Although statistical significance was not found with the use of autolaunch, patient outcomes still were improved by this method. Information provided could be used by helicopter programs considering implementing autolaunch.