^（99m）Tc－RBC显像诊断下消化道出血初步评价

PRIMARY EVALUATION OF ^(99m)Tc-RBC IMAGING FOR THE DIAGNOSIS OF LOWER GASTROINTESTINAL BLEEDING

分析了１０例应用９９ｍＴｃ－ＲＢＣ显像诊断并经手术对照的下消化道出血患者，结果提示９９ｍＴｃ－ＲＢＣ显像对活动性消化道出血尤其是小肠出血优于其他检查，具有较好的临床使用价值．但由于病变部位出血，溢到肠腔内的标记红细胞随肠蠕动弥散．或由于结肠游离移位造成显像部位与病灶部位不符，定位诊断有一定困难，放手术时应全面探查肠道，并警惕有胆道出血之可能．

Abstract mTc-RBC gastrointestinal (GI) scintigraphy was performed in 10 patients with lower GI bleeding which was confirmed by operation later. The results suggested that 99mTc-RBC imaging was an effective method for the diagnosis of intestinal hemorrhage, especially the small intestine. However, there was some difficulty in accurately localizing the bleeding site due to the movement of the blood containing labelled RBC from original bleeding site to lower portion during intestinal peristalsis and also displacement of the moving colon. Therefore it was necessary to completely explore the intestine carefully and awareness of the possibility of biliary herzioirhage.