An Interventional Study to Improve Paramedic Diagnosis of Stroke

Abstract

Objective. The aim of the Faster Access to Stroke Therapy (FAST) study was to determine the effect of educational intervention andthe use of a prehospital stroke tool on the paramedic diagnosis of stroke. Methods. Paramedics in emergency medical service units servicing a university teaching hospital were divided into two groups: FAST study paramedics (n = 18) andnon-FAST study paramedics (n = 43). The FAST study paramedics received stroke education andinstruction in the use of a prehospital stroke assessment tool [Melbourne Ambulance Stroke Screen (MASS)] to assist in stroke diagnosis. Based on final hospital diagnosis, the sensitivities of paramedic stroke diagnosis in the two groups were compared for a 12-month period before andafter the intervention. Results. The sensitivity for the FAST study paramedics in identifying stroke improved from 78% (95% confidence interval [CI]: 63% to 88%) to 94% (95% CI: 86% to 98%) (p = 0.006) after receiving the stroke education session andwith use of the MASS tool. There was no change in stroke diagnosis for the non-study paramedics 78% (95% CI: 71% to 84%) to 80% (95% CI: 72% to 87%) (p = 0.695). Prenotification of impending arrival to the emergency department was associated with higher-priority triage in the emergency department, andsubsequent shorter times for door to medical review (15 min vs. 31 min, p < 0.001) anddoor to computed tomography (CT) scanning (94 min vs. 144 min, p < 0.001). Conclusions. Targeted stroke education andthe use of a simple clinical tool can significantly improve the diagnostic sensitivity of stroke by paramedics in the prehospital setting. Accurate diagnosis combined with prenotification of the pending arrival of stroke patients will allow for the focused andtimely application of resources for the management of acute stroke.

Keywords:

• emergency medical services
• cerebrovascular accident
• stroke
• diagnosis