Why is the last known well time critical in stroke assessment?

The last known well time is crucial in stroke assessment because it directly influences the eligibility for various stroke interventions, including the administration of thrombolytics or mechanical thrombectomy. Time is a significant factor in the treatment of strokes, particularly ischemic strokes, where the timely administration of treatment can greatly impact patient outcomes.

Identifying when the patient was last seen in a normal state helps medical professionals establish a timeline for the onset of symptoms and assess whether a patient is within the critical window to receive these life-saving interventions. Delays in treatment can lead to more extensive brain damage and poorer recovery prospects. Therefore, understanding the last known well time is essential for making informed, time-sensitive decisions regarding patient care.