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近年来,随着纤维光学器械的进展,已有试用内窥镜进行全消化道的检查。尽管用于土、下消化道的窥镜有了许多改良,但能更全面检查消化道而适用于小肠内窥镜术的器械为数很少。有些上消化道内窥镜,长135-180Cm,能够到达空肠上段,大多数常规结肠镜达到迴盲瓣以上约50Cm而进入迴肠末段。仍然还有小肠的主要部分需要直接观察,而常规内窥镜难以达到。近年文献中常有报导消化道血管异常造成隐匿的及大出血的病例,小肠作为出血的来源已受到重视。
In recent years, with the progress of fiber optics, there have been trials of endoscopy for examination of the whole digestive tract. Although there are many improvements to endoscopes used in the earth and lower digestive tract, the number of devices that can be used for small intestine endoscopy is more limited to the digestive system. Some upper gastrointestinal endoscopy, long 135-180Cm, to reach the upper jejunum, most of the conventional colonoscopy reaches the ileocecal valve more than about 50Cm into the terminal ileum. There are still major parts of the small intestine that require direct observation, which are difficult to achieve with conventional endoscopy. In recent years, often reported in the literature caused by digestive tract abnormalities occult blood and cases of bleeding, the small intestine as a source of bleeding has been taken seriously.