Manometric evaluation of an artificial intestinal valve.

A new type of intestinal valve was constructed by telescoping the proximal portion of the intestin into the distal portion. The length of telescoped intestine was expressed in relation to its diameter. Various lengths of intestine were tested in 29 dogs. Valvular function was evaluated under pentobarbital sodium anesthesia, with open-tip catheters perfused at a rate of 5 mul to 6 mul/sec. An intestinal valve, made by telescoping two diameter lengths of the intestine, yielded the most similar results manometrically to those of the ilecolonic junction. Mean isoperistaltic and antiperistaltic pressures were measured to be 25.0 +/- 2.0 and 39.0 +/- 3.8 cm H2O in the valve, and 20.4 +/- 2.2 and 39.7 +/- 5.1 cm H2O in the ileocolonic junction. No alteration of the valvular function was found in the long-term follow-up study.