We evaluated 67 patients with acute bleeding of the lower gastrointest
inal tract, for diagnostic accuracy of colonoscopy and scintigraphy, F
ifty-nine patients were stable after initial resuscitation and underwe
nt colonoscopy, The source of hemorrhage was identified in 30 patients
(50.8%), Tc-labeled red blood cells scintigram was undergone in 23 pa
tients with a sensitivity of 43.4%, The identification of the bleeding
source reached 75.4% when colonoscopy was used in combination with sc
intigraphy, Eleven patients with lower gastrointestinal bleeding requi
ring transfusion of 5 units of red blood cells or more had a diagnosti
c exploratory laparotomy, and the diagnosis was ascertained during ope
ration in nine, The postoperative mortality rate was 18.1%, We conclud
e that in patients with active gastrointestinal bleeding, colonoscopy
in combination with scintigraphy detect at a higher rate the cause and
the site of bleeding and possibly improve the prognosis.