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GI Bleed
CM1-Fall 2011
Question | Answer |
---|---|
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) |