J.Jpn. Surg. Soc.. 88(9): 1305-1308, 1987

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Report on the annual meeting

ANAL FUNCTION AFTER SPHINCTER PRESERVING OPERATION OF PERANAL ANASTOMOSIS FOR LOWER RECTAL CANCER

Since 1980, 20 patients with lower rectal cancer underwent coloanal anastomosis via the anus. Postoperative anal function was evaluated physiologically using anorectal manometric study and based on clinical symptoms. These findings were compared with those of 33 patients who had undergone low anterior resection for rectal cancer.
In the early postoperative stage (within six months), patients who underwent peranal anastomosis showed poor function as faecal reservior and minor anal sphincteric dysfunction. However, bowel frequency gradually improved and recovered to have three to four times of bowel motions by the 12th postoperative month. The sphincteric dysfunction improved month by month and only a few patients complained of anal soiling even after one year. As for the findings of manometric study, maximum pressure and rhythmic waves of the anal canal at rest decreased at the first postoperative month, but they gradually improved to normal level within 6 to 12 months after operation. Maximum voluntary pressure did not show any change.
It is concluded that the patients undergone peranal anastomosis become to have good or fair postoperative anal function and to enjoy their lives without colostomy within a year.

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