[Experimental study on intestinal movement after total gastrectomy with jejunal interposition].
In order to study the physiological changes in the intestinal movement after total gastrectomy with jejunal interposition, electromyography was taken from different sites of small intestine of the dogs with and without gastrectomy. Both 6 and 12 months after surgery, the frequency of the basic electric rhythm (BER) of interposed jejunum was lower and that of distal jejunum was much lower than that of duodenum. Most of the interdigestive migrating electric complexes (IMEC) was originated in the oral side of the interposed jejunum; the rate of occurrence increased after the operation further and reached to 91.5% one year after the operation. Most of the dogs showed the propagation pattern from interposed jejunum to duodenum and to distal jejunum; this tendency increased after the operation and 80.8% of the dogs showed this pattern one year after the operation. Thus, the IMEC, conducted usual intestinal order disappeared after the operation and those originated from oral to anal side, regardless of their original order. These results suggest that the order of the propagation of IMEC were determined by the order of the portion of intestine after operation and the parietal continuity, rather than extrinsic nerves, is involved in the propagation. It is also suggested that the propagation of IMEC is not always correlated with the gradient in the difference of the BER between the replaced jejunum and duodenum.
Second Department of Surgery, Toho University School of Medicine, Tokyo.
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Seimiya
D000200:Action Potentials; D000818:Animals; D004285:Dogs; D004576:Electromyography; D005743:Gastrectomy; D005769:Gastrointestinal Motility; D007421:Intestine, Small / Q000502:physiology; D007583:Jejunum / Q000637:transplantation*