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目的：探讨肛直肠压力在直肠癌术后的变化以及在肛门功能评价中的价值。方法：选择直肠癌低位前切除术（Ｌｏｗａｎｔｅｒｉｏｒｒｅｓｅｃｔｉｏｎ，ＬＡＲ）的病人３１例；腹会阴直肠癌切除、耻骨直肠肌成形、乙状结肠会阴造瘘术（Ａｂｄｏｍｉｎａｌｐｅｒｉｎｅａｌｒｅｓｅｃｔｉｏｎ，ＡＰＲ）的病人２５例，正常对照组１０４例。测定了肛管、直肠的静息压，肛管最大挤压压，直肠初感容量和直肠最大耐受量，直肠肛门抑制反射以及直肠顺应性。结果：ＡＰＲ术后肛管静息压和肛管最大挤压压明显低于正常对照组；直肠最大耐受量和顺应性与ＬＡＲ术后的每日大便次数呈负相关；与ＡＰＲ术后的肛门功能呈正相关。结论：肛管最大挤压压，直肠最大耐受量以及直肠顺应性是判断直肠癌术后肛门功能的主要参数。
Objective: To investigate the changes of anorectal pressure in postoperative rectal cancer and its value in evaluation of anal function. METHODS: Thirty-one patients with rectal cancer low anterior resection (LAR) were selected; 25 patients with abdominal perineal rectal cancer resection, puborectal muscle formation, sigmoid perineal resection (APR) and 104 normal controls. . The resting pressure of the anal canal and rectum was measured, the maximum anal canal pressure, rectal initial capacity and rectal maximum tolerance, rectal anal suppression reflex, and rectal compliance. Results: The resting pressure of the anal canal and the maxillary squeezing pressure of the anal canal after APR were significantly lower than those of the normal control group. The maximum tolerance and compliance of the rectum was negatively correlated with the number of daily stools after LAR; it was associated with postoperative APR. Anal function was positively correlated. Conclusion: The maximum pressure of the anal canal, the maximum tolerance of the rectum, and rectal compliance are the main parameters to judge the postoperative anal function of rectal cancer.