[An electromyographic study on the canine gastric motility following segmental gastrectomy with selective proximal...

In order to clarify the gastric motility after segmental gastrectomy (SG) with selective proximal vagotomy (SPV), seventeen canines equipped with four bipolar electrodes on the anterior wall of the stomach underwent four types of operation: 1-group, SG (middle corpus) with SPV-6 dogs; 2-group, SG (middle corpus) with SPV and pyloroplasty-5 dogs; 3-group, SG (upper corpus) with SPV-3 dogs; 4-group, SG (middle corpus) with antral vagotomy (AV)-3 dogs. 1-group: In the preanastomosis, the basic electrical rhythm (BER) frequency was not altered significantly, but the propagation velocity of the BER decreased by about 2 to 20% in the late postoperative period. In the postanastomosis, the BER frequency was markedly reduced, but progressively recovered to show the synchronization with that in the preanastomosis following 15 to 30 days postoperation. The propagation velocity of the BER decreased by about 3 to 25% in the late postoperative period. In the postanastomosis, dysrhythmias were observed to occur in high incidence in the early postoperative period, ut were transient occurrence. 2-group: The high-frequency-dysrhythmias (about 10 cycles/min) were observed. Pyloroplasty increased the frequency of dysrhythmias due to deranging the electric insulator of the pyloric ring. 3-group: In the late postoperative period, the BER frequency didn't synchronize with that in the preanastomosis in fasting. 4-group: Dysrhythmias were observed to occur in the late postoperative period. It was suggested that the gastric motility of the SG with SPV recovered in the late postoperative period, therefore pyloric ring can be preserved.