ELECTROPHYSIOLOGICAL STUDIES ON THE PERISTALTIC PROPAGATION IN THE SIDE-TO-SIDE ANASTOMOSED INTESTINAL LOOPS

To study the mode of peristaltic propagation from the oral part to the anal over and across the anastomotic line following side-to-side smallintestinal anastomosis, the action potentials were recorded from the surface of the rabbit's intestine, which was survived by means of a modified Trendelenburg's method.Within one week following the side-to-side anastomosis, spike bursts of varying periods were recorded from electrodes placed above and below the anastomotic line and it was noted that the amplitude was generally low. Within one month after the anastomosis, the spike potentials above the anastomotic line were greater than those of below as in the case of an end-to-end anastomosis. Within two months, however, the action potentials above and below the anastomotic line seem to return to the normal pattern, but the amplitude of spikes recorded from the electrode placed just above or below the anastomotic line was 200μV, and it was lower than those of normal by 30-50μV. In three months after the anastomosis, the patterns of spike bursts were restored from conduction-block to those of the normal, and at this stage it is expected that the effective transport of the intestinal content may take place.