目的 对比观察改良LIFT术式治疗肛瘘的临床疗效。方法 将100例接受手术治疗的肛瘘患者分为对照组和观察组,每组50例;对照组接受传统手术方式治疗,观察组采用改良LIFT术治疗,回顾性分析比较两组患者的临床疗效、术后肛门功能、并发症。结果 观察组治疗总有效率高于对照组（98.00% 对 82.00%,P<0.05）,术后1、2个月肛门功能改善优于对照组（P<0.05）,并发症发生率低于对照组（2.00% 对26.00%,P<0.05）。结论 与传统手术方式相比,改良LIFT术式治疗肛瘘效果显著,改善患者术后肛门功能,降低并发症发生风险,值得临床推广。

Objective To observe and compare the clinical effects of modified LIFT on anal fistula. Methods One hundred anal fistula patients receiving surgical treatment were divided into a control group and an observation group, with 50 cases in each group. The control group received traditional surgical treatment, while the observation group received modified LIFT surgery. The clinical efficacy, postoperative anal function, and complications of the two groups were retrospectively analyzed and compared. Results The total effective rate of the observation group was higher than that of the control group （98.00% vs. 82.00%, P<0.05）, the anal function 1 and 2 months after surgery was better （P<0.05）, and the incidence rate of complications was lower （2.00% vs. 26.00%, P<0.05）. Conclusion Compared with the traditional surgical method, the modified LIFT surgery has a significant effect on anal fistula with improved postoperative anal function and reduced risks of complications, which is worthy of clinical promotion.