MEDRADSC 3DA3 Study Guide - Final Guide: Stroke, Embolectomy, Brain Ischemia
8 Apr 2020
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Stroke: 3rd most frequent cause of death, 20-30% don"t survive, fast: face, arms, speech, time. Ischemic: 80% of stokes, can be thrombotic or embolic, hemorrhagic, ruptured blood vessels in brain, due to trauma, high blood pressure or atherosclerosis, people on blood thinners more susceptible. Timing: rapid diagnosis and treatment is critical. Ischemic stroke treatment t-pa: thins and breaks down clot to be passed naturally: expensive, should be given within 4. 5hours of onset, guidelines say time between arrival to er and administration of t- Pa should be 60mins: endovascular thrombectomy to remove clot, performed within 6 hours t-pa, works on tissue that is ischemic but not yet infarcted called penumbra, tissue with diminished perfusion. Stoke patients may have infarcted tissue surrounded by penumbra which is the target. If arrival within 6 hours at a site that offers endovascular thrombectomy, cta must first be performed: assess and identify target for appropriate treatment.
