目的 对痔上黏膜环形切除钉合术（procedure for proplapse and hemorrhoids，PPH）和传统外剥内扎术治疗Ⅲ、Ⅳ度内痔与混合痔的疗效进行对比分析。方法 采用对照研究，将100例Ⅲ、Ⅳ度内痔及混合痔患者随机分成PPH组和传统外剥内扎术组，每组50例。对两组手术时间、疼痛持续时间、住院时间、术后并发症、住院费用以及疗效进行比较。结果 PPH组的手术时间、疼痛持续时间、住院时间、术后并发症均低于传统外剥内扎组，而PPH组的住院总费用高于传统手术组。结论 PPH是一种治疗Ⅲ、Ⅳ度内痔和混合痔安全有效的方法。

Objective To compare the outcome of procedure for proplapse and hemorrhoids (PPH) and milligan-morgan procedure. Methods One hundred cases of the Ⅲ, Ⅳ degree internal and mixed hemorrhoid patients were randomly devided into PPH group (n=50) and milligan-morgan procedure group (n=50) to compare their opernating time, postoperative pain, length of hospital stay, hospital fees, postoperative complications and efficacy. Results Operation time, postoperative pain, length of hospital stay, postoperative complications in PPH group were lower than those in milligan-morgan procedure group, while hospital fee on the contrary. Conclusions PPH is a safe and effective treatment in the management of the Ⅲ, Ⅳ degree internal and mixed hemorrhoids.