Emergency Medical Services (EMS) and Emergency Medicine staff are often described as life-saving providers, but there is no generally accepted objective definition of a life saved by these providers. Therefore, a proposed defi- nition is described. Development of this definition began with conceptual rules, followed by a survey of physician EMS medical directors, and then by the development of a tool to implement the definition, and measure its validity and reliability through a review of 100 critical care transport EMS patient charts.
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