SPECTRAL-ANALYSIS OF INTRALUMINAL PRESSURE IN THE ANASTOMOSED ILEAL SEGMENT OF THE RAT IN-VITRO

Spectral analysis of the spontaneous intraluminal pressure of the isol ated ileal segments in vitro was performed (1) before transection and soon after union (acute model) and (2) until 67 days after anastomosis (chronic model). A single peak was found in the spectral arrays of th e acute model before transection. However, more than two peaks were cl early found in spectral arrays of both acutely or chronically anastomo sed models. Motor activities of both oral and anal part of the anastom osis seem to be reflected in the spectral analysis of the intraluminal pressure of the isolated segments in vitro. More than two peaks in sp ectral arrays suggest that the synchronized and coordinated motor acti vity was not recovered, at least, until 67 days after anastomosis.