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小肠出血包括十二指肠、空肠和回肠出血,约占整个消化道出血的3%-5%~([1])。其中十二指肠出血可以通过胃镜直接诊断,故狭义上的小肠出血,通常是指空肠和回肠出血。由于小肠长达4-6m,肠襻间相互重叠,蠕动和收缩使小肠段在腹腔内位置多变,且小肠出血常常是慢性或间隙性的,无明显诱因,临床表现无特异,诊断较难。近年来,随着小肠镜、胶囊内镜、气钡双重造影、核素影象及选择性动脉造影、CT等技术的发展,小肠出血的诊断准确性有所提高。
Small intestinal bleeding, including duodenum, jejunum and ileum bleeding, accounting for the entire gastrointestinal bleeding 3% -5% ~ ([1]). Which duodenal bleeding can be directly diagnosed by gastroscopy, so the narrow sense of bleeding in the small intestine, usually refers to the jejunum and ileum bleeding. Due to the small intestine up to 4-6m, intestine overlap between the peristalsis and contraction of the small intestine in the intra-abdominal position, and intestinal bleeding is often chronic or intermittent, no obvious incentive, no specific clinical manifestations, the diagnosis is more difficult . In recent years, with the development of small bowel endoscopy, capsule endoscopy, double contrast barium, radionuclide imaging and selective arteriography, CT and other technologies, the diagnostic accuracy of small intestinal bleeding has increased.