近年来,由于纤维光学的发展,已经制出各种类型的胃和十二指肠纤维内窥镜(简称:纤镜)供临床应用,使胃和十二指肠疾患的诊断水平有较大的提高,特别对于早期胃癌的诊断和治疗帮助很大。本文对胃和十二指肠纤镜的原理、性能、操作要点和主要临床应用作一简要介绍。纤维内窥镜的原理目前用作纤维内窥镜的材料是玻璃光学纤维。当玻璃材料拉成几十微米以下细长的纤维时,变得较为柔软,可以任意弯曲。光线进入玻璃纤维杆后,是稍具弯折地达到其内表面,接着又被全反射到对面的内表面,如此反复地反射,光就从一端传到另一端。当玻璃纤维杆 In recent years, due to the development of fiber optics, various types of gastric and duodenal fiber endoscopes (referred to as: fibroscope) have been made for clinical application, so that the diagnosis of gastric and duodenal disorders have a greater level Of the increase, especially for the diagnosis and treatment of early gastric cancer is very helpful. This article gives a brief introduction of the principle, performance, operation points and main clinical application of stomach and duodenoscope. Principle of the Fiber Endoscope The material currently used as a fiber scope is a glass optical fiber. When the glass material pulled into the tens of microns below the elongated fibers, become more flexible, can be bent. After the light enters the glass fiber rod, it is slightly bent to reach its inner surface, and then is totally reflected to the opposite inner surface, so repeatedly reflected, the light is transmitted from one end to the other end. When fiberglass rods