title: Use of colonoscopy for localization of bleeding site in severe lower gastrointestinal hemorrhage.
mesh_terms: D000368:Aged; D003113:Colonoscopy; D004241:Diverticulum, Colon / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D008467:Meckel Diverticulum / Q000175:diagnosis; D008638:Mesenteric Arteries; D008641:Mesenteric Vascular Occlusion / Q000175:diagnosis; D008875:Middle Aged; D012007:Rectum