Why don't stroke patients get tpa (alteplase) therapy?

Patients wait: The most common reason is they wait too long before presenting to hospital. Current guidelines for t-pa in most hospitals have been extended from 3to 4.5->5 hours after the onset of symptoms of a stroke. Part of the problem is many patients wake up with weakness/speech difficulties, the time of onset can't be determined, the patient is ineligible.Recent major surgery or bleeding are exclusions.

They can: If having a stroke one can receive intravenous tpa (alteplase) up to 3 hours once symptoms begin and up to 4.5 hours in certain cases. After this intra.