One of the principal methods of acquiring information and data pertaining to the physiological and pathological processes of the intestine has been that of utilization of numerous types of isolated segments, fistulae, or transplanted loops constructed along the course of the alimentary canal. Experimental preparations of this sort have been employed to measure, sample, or titrate the intraluminal contents or to determine the physical activity of the bowel under a variety of laboratory conditions.
It was Thiry1 who first devised a practical and easily constructed blind fistula. One end of an isolated portion of the intestine was closed, the opposite opening brought out through the abdominal wall, and the continuity of the remaining intestine was reestablished by a direct end-to-end anastomosis. Some years later, Vella2 modified this fistula by bringing both ends of the segment through the abdomen, thus creating an exit from, as well as an entrance
ANDERSON RE, DIFFENBAUGH WG, SCHMIDTKE WH. Isolated Circular Intestinal LoopLoop with an Access Fistula for Experimental Studies of Intestinal Function. Arch Surg. 1962;84(5):559-563. doi:10.1001/archsurg.1962.01300230075014