目的　探讨肛门直肠测压对诊断慢性便秘的临床意义。方法　对 40例长期便秘的病人使用顶端带气囊水灌注导管检测直肠感觉阈值、初始排便阈、直肠最大耐受容量、直肠肛门抑制反射和肛门括约肌静息压、缩窄压。结果　 40例病人均有直肠感觉阈值、初始排便阈、直肠最大耐受容量的异常 ,直肠肛门抑制反射、肛门括约肌静息压、缩窄压正常。结论　慢性便秘患者直肠肛门测压直肠感觉有异常 ,肛管运动功能无明显改变。该方法简单 ,操作容易 ,无创伤 ,易重复 ,可在临床上推广使用 Objective To investigate the clinical significance of anorectal manometry in the diagnosis of chronic constipation. Methods Forty patients with long-term constipation were enrolled in this study. Rectal sensory threshold, initial defecation threshold, maximal rectal capacity, rectal anal reflex and anal sphincter resting pressure and systolic pressure were measured using a balloon catheter. Results All the 40 patients had rectal sensation threshold, initial defecation threshold, abnormal maximum rectal capacity, rectal anal reflex, anal sphincter resting pressure and narrowed systolic pressure. Conclusions The rectal anorectal manometry in the patients with chronic constipation has abnormal sensation in the rectum, and there is no significant change in the anal canal function. The method is simple, easy to operate, non-invasive, easy to repeat, can be clinically used