Abstract
On 3 cases of gall stones in the common bile duct and/ or bile flow stasis, the electromyograms of duodenal pap-illa were recorded before and after the endoscopic sphin-cterotomy of the ampulla of Vater by endoscopic direct induction method. The electromyograms of duodenal papilla after endoscopic sphincterotomy showed almost similar patterns and rhythms to those before endoscopic sphincterotomy. The bile flow mechanism was not destroyed functionally by endoscopic sphincterotomy. On the view of the topographical anatomy and the physiology of duodenal papilla, the endoscopic sphincterotomy of the ampulla of Vater should be performed for the pur-pose of the removal of stones at the common bile duct and the temporary elimination of bile stasis was emphas. ized.
