Emergency medical service agency definitions of response intervals

Study objective: There is a time continuum from emergency medical services (EMS) dispatch, response, scene, transport, and arrival at the hospital. Previous research has documented favorable patient outcome with short response intervals; however, these studies revealed the documentation of EMS time...

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Bibliographic Details
Published in:	Annals of emergency medicine Vol. 34; no. 4; pp. 453 - 458
Main Authors:	Meislin, Harvey W, Conn, Jennifer B, Conroy, Carol, Tibbitts, Mark
Format:	Journal Article
Language:	English
Published:	New York, NY Mosby, Inc 01-10-1999 Elsevier
Subjects:	Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy Biological and medical sciences Emergency and intensive care: techniques, logistics Emergency Medical Services - statistics & numerical data Evaluation Studies as Topic Humans Intensive care medicine Intensive care unit. Emergency transport systems. Emergency, hospital ward Medical sciences Time and Motion Studies United States United States Human Medicine Methodology Emergency medical care unit Response time Definition Time interval Measurement method Emergency Logistics
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Summary:	Study objective: There is a time continuum from emergency medical services (EMS) dispatch, response, scene, transport, and arrival at the hospital. Previous research has documented favorable patient outcome with short response intervals; however, these studies revealed the documentation of EMS time intervals is not always consistent. This study evaluates how agencies estimate these times and factors that may affect the length of response intervals. Methods: The study used a mail questionnaire to assess factors related to response intervals and to determine how agencies define and record response intervals. All ground-based EMS agencies in a southwestern state were invited to participate in the survey. Univariate and stratified data analyses compared definitions of response intervals. Results: Agencies varied as to how they defined the start and end of the response. Fifty-six percent stated that their response started when the responding unit was notified of the call. However, almost 23% defined response interval as starting when dispatch received the call, and 11% defined it as starting with the initial 911 call. A factor that affected response intervals was routing of the 911 call. Less than 6% of agencies had only 1-call routing. Conclusion: Agencies use different time points as the start and end of their response interval, which makes comparison of results directly related to response intervals across agencies or regions difficult. To maintain an appropriate standard of prehospital emergency medical care throughout the state, the use of consistent standard terminology defining response intervals will help reach that goal.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0196-0644 1097-6760
DOI:	10.1016/S0196-0644(99)80046-8