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激光光束照射组织时,它的光能被吸收转化为高热能。由于高热,瞬间使组织中的水分蒸发气化,所以组织消失。激光在外科上的应用,就是利用它聚光于透镜焦点时,组织被蒸气气化而消失,如果连续移动时就产生切割作用的原理,从而可作为激光刀;如果在焦点外,就产生凝固作用和止血作用,这样就可用为组织的凝固及止血。如图1。激光照射后的组织断面,见图2。
When the laser beam irradiates the tissue, its light energy is absorbed and converted into high thermal energy. Due to the high heat, instantaneous evaporation of water vaporization in the organization, so the organization disappears. Laser surgery, is the use of its focus on the lens focus, the organization was vaporized and disappeared, if the continuous movement of the cutting effect of the principle, which can be used as a laser knife; if the focus, it will have the role of coagulation And hemostatic effect, so that can be used for tissue coagulation and hemostasis. Figure 1. Laser cross-section of the tissue, shown in Figure 2.