自从1960年Maiman制成世界上第一台红宝石激光器以来,激光技术的发展异常迅速,成为近二十多年来最引人注目的新兴学科之一。我国于八十年代初开始应用内窥镜激光治疗胃、十二指肠疾病并发大出血,都获得满意的疗效。激光止血的原理激光具有亮度高、颜色纯(即单色性)和方向准直等优点。其止血原理主要是利用高能激光对出血血管和组织产生的光凝固作用。目前经纤维内窥镜治疗消化道出血和血管病变的激光有两种。一为氩离子激光,另一为YAG激光。氩离子激光为蓝绿色光。波长为0.48μm(蓝色)和0.51μm(绿色);YAG激光的波长为1.06μm。氩离子激光器所发射出的蓝绿色激光,可被红色物质的 Since Maiman made the world’s first ruby ​​laser in 1960, laser technology has developed exceptionally rapidly and has become one of the most prominent new emerging disciplines in more than two decades. China began in the early eighties early application of endoscopic laser treatment of stomach, duodenal disease complicated with bleeding, have obtained satisfactory results. The principle of laser hemostasis Laser with high brightness, pure color (monochromatic) and the direction of alignment and so on. The hemostasis principle is mainly the use of high-energy laser light bleeding blood vessels and tissues produced by the photocoagulation. At present, there are two kinds of lasers for treatment of gastrointestinal bleeding and vascular lesions by fiber endoscopy. One is argon-ion laser and the other is YAG laser. Argon ion laser is a blue-green light. The wavelengths are 0.48 μm (blue) and 0.51 μm (green); the YAG laser has a wavelength of 1.06 μm. Argon ion laser emitted by the blue-green laser, the red material can be