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Topic Info
TopicName
Chronic GI (rectal) bleeding
ClinicalTests
CBC; Fecal occult blood; AST/ALT/bilirubin/Alk Phos; PTT/INR; CEA; Calprotectin (IBS>50, IBD>150);
ImagingStudies
Colonoscopy; If no source of bleeding found: Barium contrast study;
PhysicalExams
Vital signs ± orthostatics; abdominal and rectal exams.
Comment
Melena vs. bright red blood; amount, duration; associated symptoms (constitutional, abdominal or rectal pain, tenesmus, constipation/diarrhea); menstrual cycle; trauma; history of similar symptoms; prior colonoscopy; medications (especially blood thinners); history of easy bleeding or atherosclerotic vascular disease, renal disease, aortic valve disease, liver disease, alcoholism, or abdominal aortic aneurysm repair; family history of colon cancer.
WebLink
https://www.aafp.org/afp/2009/1101/p977.html | https://www.aafp.org/afp/2005/0401/p1339.html
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