Preserved viability of the isolated bowel segment, created by omentoenteropexy: a histological observation.

Creation of the isolated bowel segment (IBS) by omentoenteropexy in rats and dogs consists of a two-step procedure: initial omentoenteropexy to the antimesenteric border of a jejunal segment, and division of its mesentery 6 weeks later. Viability of this IBS is maintained by the angiogenic process, which occurs at the level of the myoenteropexy. Histological studies were performed by light microscopy on the bowel wall structures of the IBS before and after the mesenteric division, as well as after a lengthening procedure performed on the IBS in one dog. The authors conclude that (1) in rats and dogs the intestinal wall structures of all IBS variants created by omentoenteropexy appear close to normal, and (2) neovascularization can be clearly detected at the level of the omentoenteropexy.