Time Window for Hospital Arrival After Thrombotic Stroke

Critical Time Windows for Stroke Treatment

Patients experiencing a thrombotic stroke should arrive at the hospital within 4.5 hours of symptom onset to maximize eligibility for thrombolytic therapy, with earlier arrival (ideally within 3 hours) associated with better outcomes 1, 2
Intravenous thrombolytic therapy (alteplase) can be administered up to 4.5 hours from stroke symptom onset, though treatment is most effective when given earlier 1, 2
The "golden hour" for stroke treatment is within the first 3 hours, when thrombolytic therapy has the highest efficacy and safety profile 2
Some patients may be eligible for endovascular treatment when highly selected by neurovascular imaging up to 24 hours from symptom onset, but this applies only to specific cases 3

Door-to-needle time (time from hospital arrival to treatment) should be less than 60 minutes (upper limit) with a target median of 30 minutes or less 1, 4
On-scene time with suspected stroke patients should be as short as possible, ideally 20 minutes or less for patients presenting within the 4.5-hour treatment window 2, 3
The European Stroke Organisation recommends a maximum of 30 minutes to obtain and analyze the CT scan 5

Emergency Medical Services (EMS) should categorize stroke patients as high priority for evaluation, response, and transport 2, 3
Direct transport protocols should be in place to facilitate transfer of suspected stroke patients to the most appropriate acute care hospital capable of providing thrombolytic therapy 1, 3
While en route to the hospital, paramedics should notify the emergency department of the incoming stroke patient to activate "Code Stroke" protocols 3, 6
Patients should be triaged as Canadian Triage Acuity Scale (CTAS) Level 2 in most cases, or Level 1 for those with compromised airway, breathing, or cardiovascular function 3

For every minute delay in treating a stroke, an estimated 1.9 million neurons are lost, emphasizing the critical importance of rapid hospital arrival and treatment 1