胃肠道出血在临床上常见,其中急性胃肠道出血占急症病人的20％以上。有76％～90％的病人可以通过内窥镜及钡剂检查确定出血的性质及来源,但内窥镜诊断易受操作者经验的限制,而且难于诊断小肠出血。核素扫描可以诊断低速胃肠道出血,但定位性差。传统血管造影是诊断活动性胃肠道出血的常用技术,常常能确定其原因和部位,但要依赖于活动性出血的速度。作者比较了上述诊断技术后,认为螺旋CT技术如果与动脉造影相结合,也 Gastrointestinal bleeding is clinically common, of which acute gastrointestinal bleeding accounts for more than 20% of emergency patients. 76% to 90% of patients can determine the nature and source of bleeding through endoscopy and barium examination. However, endoscopic diagnosis is limited by the experience of the operator and difficult to diagnose intestinal bleeding. Radionuclide scan can diagnose low-speed gastrointestinal bleeding, but poor positioning. Conventional angiography is a commonly used technique for diagnosing active gastrointestinal bleeding and often identifies its cause and location, but depends on the rate of active bleeding. After comparing the above diagnostic techniques, the author thinks that if the spiral CT technique combined with arteriography, also