我们采用国产XW—Ⅱ型侧视胃镜观察十二指肠,在通过幽门时其方法与以往文献介绍的有所改进。并用改进后的方法实际操作观察200例次。全部一次顺利通过,现介绍如下: 当物镜镜面按近幽门(距离1～2厘米)能清晰看到幽门孔时,待幽门开放,调节角度钮使视野方块下缘的边与幽门的上方缘相吻合,让幽门孔恰好消失在视野方块的下方。此时,胃镜头末端正 We use the domestic XW-Ⅱ type endoscopy gastroscopy observed duodenum, pyloric when passing through the method described in the literature and previous improvements. And with the improved method of practical observation of 200 cases. All passed successfully, are introduced as follows: When the objective lens mirror near the pylorus (distance 1 ~ 2 cm) can clearly see the pyloric hole, to be pylorus open, adjust the angle button so that the bottom edge of the visual field and pylorus edge of the upper phase Anastomosis, so pylorus just disappear in the box under the visual field. At this point, the end of the stomach camera is positive