[Experimental study of the influence of the segmental transverse colic reversion on the intestinal transit time]

to study the feasibility of the transverse segment colic reversion and to evaluate its impact on the intestinal transit time in the rat Wistar.

On a test group of the rats Wistar males anaesthetized, we isolated a segment from the transverse colon vascularized by a feeder pedicle. This segment colic was reversed and anastomosed into antiperistaltic out of termino-terminal on its site with polyglactine 6/0. Into post-operative, we studied, the weight, the volume of the ingestats, the intestinal transit time, the survival and the histological lesions of the reversed segment colic. On the group controls, we carried out the anastomosis of a segment of the transverse colon isolated and anastomosed into isoperisaltic.

Thirty rats males of 231.5 +/- 8.3g had been operated, 15 for the test group and 15 for the control group. The average weight of the ingestats of the rats of the test group was of 21.87 +/- 3g and of 21.75 +/- 4.8g in the control group without significant difference. The intestinal transit occured at 3 +/- 1 post-operatives days in the test group and at 2 postoperative days in the control group. A mechanical obstruction of the bowels before the 15th post-operative day involved a mortality of 87% in the test group. Thirteen percent of the rats of the test group survived, with a regular catch of weight. The histological analysis showed inflammatory lesions on the proximal portion of the reversed segment and a normal wall without ischaemic injury on its distal portion. No death was observed in the group controls.

The antiperistaltic anastomosis of a transverse segment colic within the colic in the rat Wistar, causes a stop of the intestinal transit time by mechanical occlusion without ischaemic lesion of the segment colic reversed.