The use of a long intestinal ("bleeder") tube in the diagnosis of occult gastrointestinal hemorrhage.
D000230:Adenocarcinoma / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D000368:Aged; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000295:instrumentation* / Q000379:methods; D007580:Jejunal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D008297:Male; D009780:Occult Blood