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消化道出血是临床上常见的病症之一,能否早期定位诊断对临床治疗尤为重要。目前对于上消化道出血特别是持续性胃肠出血的诊断,内镜和X线血管造影检查有其重要价值,而对于下消化道间歇性出血的定位诊断则有时非常困难。近几年来,核素显像对消化道出血的诊断取得了较大进展,已成为诊断活动性消化道出血较为简便、灵敏的重要手段。用于消化道出血诊断的核素显像方法主要有两种:一是~(99m)Tc-红细胞显像,另一种是~(99m)Tc-胶体显像。
Gastrointestinal bleeding is one of the common clinical symptoms, whether early diagnosis of clinical diagnosis is particularly important. Currently, the diagnosis of upper gastrointestinal bleeding, especially persistent gastrointestinal bleeding, endoscopic and X-ray angiography has its value, while the diagnosis of intermittent bleeding in the lower digestive tract is sometimes very difficult. In recent years, radionuclide imaging of the diagnosis of gastrointestinal bleeding has made great progress, has become the diagnosis of active gastrointestinal bleeding is more simple and sensitive means of an important. There are two main methods of radionuclide imaging for the diagnosis of gastrointestinal hemorrhage: one is 99m Tc-erythrocyte imaging and the other is 99m Tc-colloid imaging.