Section 1: Dispatch and EMS Screening
Eligible patients are those who present with potentially disabling, acute neurological symptoms suggestive of an acute stroke within 6.0 hours of symptom onset. EVT may be considered for select patients for whom treatment can be initiated within an extended 6 to 24-hour window from stroke symptom onset who meet clinical and imaging criteria.
The Ontario Paramedic Prompt Card for Acute Stroke Protocol has been approved by the Ontario Base Hospital Medical Advisory Committee to extend the time of onset for stroke symptoms to arrival at a Stroke Centre from 4.5 hours to 6 hours.
Turc, G., Maier, B., Naggara, O., Seners, P., Isabel, C., Tisserand, M., … Oppenheim, C. (2016). Clinical scales do not reliably identify acute ischemic stroke patients with large-artery occlusion. American Heart Association Stroke, 47, 1466-1472.
Hastrup, S., Damgaard, D., Johnsen, S., & Andersen, G. (2016). Prehospital acute stroke severity scale to predict large artery occlusion: Design and comparision with other scales. American Heart Association Stroke, 47, 1772-1776.