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光导纤维胃镜用于临床已有20余年的历史,对胃粘膜及其病变的各种表现已有越来越详尽的报道。近10余年来,有些学者想使胃镜达到解剖显微镜的放大水平,以对病人的胃粘膜进行更微细的观察。因而设计了放大胃镜。几经改进,放大倍率逐步得到提高。目前已可放大35倍,如 Olympus GIF-HM,町田 FGS—MLⅡ。经过近年的临床应用,积累了不少有关胃粘膜微细形态(fine gastricmucosal pattern)的资料,对胃病的诊断将有进一步的帮助。基本原理、结构及使用方法放大胃镜的基本原理和结构与焦距可调式前视胃镜大致相同。一般焦距可调式胃镜接近观察对象时,物象放大2～3倍,甚至8倍(如
Optical fiber gastroscopy has been used clinically for more than 20 years and more and more detailed reports have been given on various manifestations of gastric mucosa and its lesions. In the past decade or so, some scholars wanted to make the gastroscope reach the magnification level of the dissecting microscope to observe the patient’s gastric mucosa finer. Thus designed to enlarge the gastroscope. After several improvements, the magnification gradually increased. Up to now 35 times magnification, such as Olympus GIF-HM, Machida FGS-ML Ⅱ. After the clinical application in recent years, a lot of information about the fine gastric mucosal pattern has been accumulated, which will help further the diagnosis of gastric diseases. Fundamentals, structures and methods of use The basic principle and structure of enlarged gastroscope and focal length adjustable gasoscopy is roughly the same. General focus adjustable gastroscope close to the observation object, the object magnification 2 to 3 times, or even 8 times (such as