Studies on the effects of various types of surgery on electrical and contractile activities of the canine stomach.
In order to clarify the gastric electrical and contractile activity after various types of surgery, 32 mongrel dogs equipped with bipolar electrodes on the anterior wall of the stomach underwent various types of operations. The basic electric rhythm (BER) frequency after middle segmental gastrectomy (MSG) with SPV was markedly reduced, but gradually returned to show synchronization with that of the preoperative value. The propagation velocity of the BER decreased. Dysrhythmias were observed to occur in high incidence in the early postoperative period, but were transient occurrences. High-frequency-dysrhythmias were observed in cases of MSG with pyloroplasty (PP). PP increased the frequency of dysrhythmias probably due to deranging the electric insulator of the pyloric ring. In cases of upper segmental gastrectomy, the BER frequency didn't synchronize with that of the preoperative state even in the late postoperative period. The gastric motility after MSG with SPV recovered in the late postoperative period, so the pyloric ring could be preserved. After massive distal small bowel resection, propagation velocity of the BER of the stomach were markedly decreased. Of the 5 gut hormones examined, only CCK correlated with the propagation velocity of the BER.
D000818:Animals; D002766:Cholecystokinin / Q000097:blood / Q000502:physiology; D004285:Dogs; D004576:Electromyography; D005743:Gastrectomy; D005769:Gastrointestinal Motility; D009130:Muscle, Smooth / Q000502:physiology; D013270:Stomach / Q000502:physiology*; D014629:Vagotomy, Proximal Gastric
D002766:Cholecystokinin