报告342例各期肛裂病人,随机分为三组:A组100例,采用指扩术。81％治愈或好转,19％无效。随访56例,复发20例,占35.7％。B组100例,采用侧切术。92％治愈或好转,8％无效。随访52例,复发6例,占11.5％。C组142例,采用扩切术,均治愈。随访75例,复发2例,占2.6％。认为指扩术不应作为治疗慢性肛裂的常规术式,仅适用于Ⅰ期肛裂或其他方法的辅助治疗。内括约肌切断术对 342 cases of anal fissure patients were reported, were randomly divided into three groups: A group of 100 cases, the use of finger expansion. 81% cured or improved, 19% invalid. Follow-up 56 cases, 20 cases of recurrence, accounting for 35.7%. B group of 100 cases, using lateral excision. 92% cured or improved, 8% invalid. Follow-up 52 cases, 6 cases of recurrence, accounting for 11.5%. Group C 142 cases, using the expansion surgery, were cured. Follow-up 75 cases, 2 cases of recurrence, accounting for 2.6%. That refers to expansion should not be used as a routine treatment of chronic anal fissure, only for stage I anal fissure or other adjuvant therapy. Internal sphincterotomy pair