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早期胃癌的激光治疗可分Nd-YAG激光凝固气化疗法(下称YAG激光)和光动力疗法(下称PDT)。一、本法的适应与限应激光内镜的根治疗法仅限于内镜所窥见之局部病变,而不能包含淋巴结和远处转移的治疗,因此其适应证应为:①m癌为最佳适应征;②局限于Sm的早期癌;③一般选择直径小于2cm的1cm左右者为宜。也有人指出,U1(-)m、<2cm的早期癌并不伴有淋巴结转移者为激光根治的对象,反之U(+)、Sm、>2cm的早期癌,则不适于本法,无论YAG或PDT,照射后癌灶部位均可发生激光所致之溃疡。二、激光照射条件(1)YAG激光:非接触照射距离为2～5cm,功率
Laser treatment of early gastric cancer can be divided into Nd-YAG laser coagulation gasification therapy (hereinafter referred to as YAG laser) and photodynamic therapy (hereinafter referred to as PDT). First, the adaptation and limitation of this method should be limited to the endoscopic treatment of laser endoscopic local disease, but can not contain lymph node and distant metastasis treatment, so the indication should be: 1m cancer is the best indication ; 2 is limited to early cancer Sm; 3 generally choose a diameter of less than 2cm about 1cm is appropriate. It has also been pointed out that U1(-)m and <2cm early cancers are not associated with lymph node metastasis as a laser-sparing target, whereas U(+), Sm, and >2cm early cancers are not suitable for this method, regardless of YAG. Or PDT, laser-induced ulceration can occur after irradiation. Second, the laser irradiation conditions (1) YAG laser: non-contact irradiation distance of 2 ~ 5cm, power