Coloplasty in low colorectal anastomosis: manometric and functional comparison with straight and colonic J-pouch anastomosis

C R Mantyh, T L Hull, V W Fazio
Diseases of the Colon and Rectum 2001, 44 (1): 37-42

PURPOSE: After resection of the distal rectum with a straight reanastomosis, poor bowel function can occur. This is felt to be because of the loss of the rectal reservoir. To overcome this, a neoreservoir using a colonic J-pouch has been advocated in low colorectal and coloanal anastomosis. However, difficulties in reach, inability to fit the pouch into a narrow pelvis, and postoperative evacuation problems can make the colonic J-pouch problematic. Coloplasty is a new technique that may overcome the poor bowel function seen in the straight anastomosis and the problems of the colonic J-pouch. The purpose of this study was to compare the functional results after a low colorectal anastomosis among patients receiving a coloplasty, colonic J-pouch, or straight anastomosis.

METHODS: Twenty patients underwent construction of a coloplasty with a low colorectal anastomosis. Postoperative manometry and functional outcome of these patients was compared with a matched group of 16 patients who had a colonic J-pouch and low colorectal anastomosis and 17 patients who had a straight low colorectal anastomosis.

RESULTS: Maximum tolerated volume was significantly favorable in the coloplasty (mean, 116.9 ml) and colonic J-pouch group (mean, 150 ml) vs. the straight anastomosis group (mean, 83.3; P < 0.05) The compliance was also significantly favorable for the coloplasty (mean, 4.9 ml/mmHg) and the colonic J-pouch group (mean, 6.1 ml/mmHg) vs. the straight anastomosis group (mean, 3.2 ml/mmHg; P < 0.05) The coloplasty (mean, 2.6; range, 1-5) and colonic J-pouch (mean, 3.1; range, 2-6) had significantly fewer bowel movements per day than the straight anastomosis group (mean, 4.5; range, 1-8; P < 0.05). Similar complication rates were noted in the three groups.

CONCLUSIONS: Patients with a coloplasty and low colorectal anastomosis seem to have similar functional outcome along with similar pouch compliance compared with patients with colonic J-pouch and low colorectal anastomosis. However, the coloplasty may provide an alternative method to the colonic J-pouch for a neorectal reservoir construction when reach or a narrow pelvis prohibits its formation. Technically it also may be easier to construct.

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