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GI Bleed

CM1-Fall 2011

What is the biggest risk fx for GI bleeding? Alcohol use (VERY toxic to GI mucosa--breaks down the lining)
What UGI bleed source is the most likely to rebleed? Esophageal varices (40-70%)
What is the MC cause of UGI bleeds? Gastric/duodenal ulcer (~50%)
What is a mallory-weiss tear? A tear in the mucosal layer at the junction of the esophagus and stomach d/t repeated vomiting/retching
What is the MC cause of a "true" LGI bleed? Diverticulosis
What can "simulate" melena? Bismuth and Iron (differentiate via stool guaiac)
What can "simulate" hematochezia? Beets
What is pulse pressure? when might it decrease? The difference bw systolic and diastolic bp -If losing blood = decrs pulse pressure
What is a very sensitive test to look for GI bleeds? Technitium-labeled RBC scan (Nuc Med)
Created by: ferrier.kath
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