title: Localization of small bowel bleeding by arterial injection of Tc-99m-labeled RBC.
abstract: A 79-year-old man with melena was suspected of having small bowel bleeding because upper and lower endoscopic findings were negative. Technetium-99m-labeled red blood cell (Tc-99m-RBC) scintigraphy was performed by arterial injection of a radiotracer from the superior mesenteric artery (SMA) after angiography. Extravasation was seen in the ileum by scintigraphy although angiography was negative. Scintigram 2 minutes after arterial injection was consistent with the late capillary phase of balloon occluded angiography. This comparison provided a better anatomical distinction. Tc-99m-RBC scintigraphy by arterial injection through the SMA identified the bleeding site in the small bowel more accurately than conventional intravenous Tc-99m-RBC scintigraphy.
authors.affiliation: Department of Radiology, Musashino Red Cross Hospital, Japan. saito-k@mxy.mesh.ne.jp
authors.forename: K
authors.initials: K
authors.lastname: Saito
authors.forename: K
authors.initials: K
authors.lastname: Koizumi
authors.forename: Y
authors.initials: Y
authors.lastname: Goto
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
authors.forename: K
authors.initials: K
authors.lastname: Abe
mesh_terms: D000368:Aged; D000792:Angiography; D004912:Erythrocytes / Q000000981:diagnostic imaging*; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D007421:Intestine, Small / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008551:Melena / Q000209:etiology*; D016553:Purpura, Thrombocytopenic, Idiopathic / Q000150:complications; D011877:Radionuclide Imaging; D013667:Technetium
chemical_list: D013667:Technetium