中文摘要：

目的探讨超声刀和高频电刀治疗重度混合痔的疗效及术后并发症的差异。方法将160例重度混合痔患者随机分为两组，每组各80例，实验组采取超声刀混合痔切除术，对照组采用电刀．观察比较两组患者的手术时间、术中出血量、术后住院时间，重点观察术后并发症，包括术后疼痛、肛周切缘水肿程度、术后尿潴留、创面愈合时间以及随访6个月观察术后远期并发症（迟发性出血、肛管狭窄、肛门失禁）等指标。结果实验组与对照组相比，在手术时间、术中出血量、术后住院时间及术后疼痛程度方面明显降低，差异均有统计学意义（t分别=20．50、33．46、5．25、X^2分别=16．99、8．32、4．11，P均〈0．05）。实验组患者术后创面水肿程度、尿潴留及创面愈合时间明显少于对照组，差异有统计学意义（X^2分别=8．94、4．65，t=12．58，P均〈0．05），在迟发性出血、肛管狭窄和肛门失禁方面，差异均无统计学意义（X^2分别=5．65、2．80、1．39，P均〉0．05）。结论超声刀混合痔切除术的临床疗效确切，具有创伤小、出血少的优点，而且在术后并发症方面也少于传统高频电刀。

英文摘要：

Objective To observe the clinical effect and post-operation complications in mixed haemorrhoidectomy of the harmonic scalpel and high frequency electrotome. Methods A total of 160 patients with severe mixed hemorrhoids were randomly divided into two groups with 80 cases in each. Patients in control group were given high frequency electro- tome, and treatment group were given Harmonic scalpel. The operation time, the amount of intraoperative bleeding and hospital stay were compared. Post-operation complications such as pain degree, perianal edema degree, urinary retention, wound healing time and the forward complications including delayed wound bleeding, anal stenosis and fecal incontinence when follow-up for 6 months were observed. Results Compare to the control group, The treatment group showed signifi- cantly shorter operation time, less intra-operative bleeding, shorter hospital stay and lighter pain degree （t = 20.50,33.46,5.25, X^2=16.99,8.32,4.11 ,P〈O.05 ）. The perianal edema degree, urinary retention and wound healing time of treatment group were significantly less than control group （X^2=8.94, 4.65, t=12.58, P〈0.05）. The differences of delayed wound bleeding, anal stenosis and fecal incontinence between two groups had no significance （X^2=5.65, 2.80, 1.39, P〉 0.05）. Conclusions The harmonic scalpel had advantages of shorter operation time, less intraoperative bleeding especial- ly less post-operation complications in mixed hemorrhoids.