Research analysis: Stroke identification in 911 calls

Researchers in Chicago have published the study, “Identifying Key Words in 9-1-1 Calls for Stroke: A Mixed Methods Approach” in “Prehospital Emergency Care.” This study analyzed dispatch recordings of confirmed acute ischemic strokes to determine the words and phrases most commonly used by both the caller and the emergency medical dispatcher (EMD).

A total of 110 calls were listened to and transcribed. The median call lasted 61 seconds and averaged 89.3 words. Five percent of the calls came from locations with trained medical staff (e.g., clinics or nursing facilities).

Fifty-three of the calls (48 percent) were correctly recognized as stroke by the EMDs. These results align with prior research showing an EMD stroke recognition rate of 31-80 percent.

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