氩离子凝固术对食管黏膜损伤的探讨

目的 探讨内镜下氩离子凝固术(APC)对食管黏膜的损伤程度。方法 在11例食管癌患者接受外科手术时,分别对其癌旁食管黏膜组织按不同功率(45 W、60 W、90 W)和不同时间(1s、3 s)进行APC烧灼。APC探头离黏膜组织约2 mm,呈约30°角,烧灼后的组织分别用光镜、电镜观察细胞及其超微结构,判断损伤程度。分析损伤程度与功率、时间的关系。结果 在55处APC烧灼后的组织切片标本中,46处仅累及黏膜层或黏膜下层,7处累及肌层,2处穿透全层。损伤深度与功率有关(P<0.01),与持续时间无明显关系(P>0.05)。结论 APC在内镜下治疗食管疾病时须将能量控制在一定范围以保证治疗的安全。

Evaluation of the esophageal wall injury resulted from Argon plasma coagulation

Objective To observe the extent of injury in esophageal mucosa resulted from Argon plasma coagulation (APC). Methods The injuries from APC were observed in 55 sites of esophageal normal mucosa in 11 patients with esophageal cancer. APC powers in 45 W,60 W and 90 W were selected with exposure times of 1 sec and 3 sec respectively. The probe of APC was hold approximately at 30?and 2 mm from the mucosa. The histological changes of esophageal wall injured by APC were examined under light and electric microscopy. Results The injuries in 46 out of 55 sites were merely restricted in the mucosa or sub-mucosa,7 out of 55 extended into the muscularis propria.and 2 of 9 sites extended to the whole depth of e-sophageal wall. The depth of injury increased in relation with the elevating of APC power (P <0. 01) ,not correlated with the duration of APC exposure (P > 0. 05). Conclusion APC is a safe way for treating esophageal diseases if its power is limited in an appropriate range.