The confluence of pancreaticobiliary ducts refers to the area between the end of common bile duct, the opening of main pancreatic duct and duodenal papilla. Those confluence diseases of pancreaticobiliary ducts will cause obstruction of biliary and pancreatic outflow tract, cholestasis, pancreatic juice deposition or pancreaticobiliary reflux, and thus induce gallstones, cholangitis, pancreatitis and other diseases. Endoscopic ampullary sphincterotomy is an important way to treat biliary and pancreatic diseases, but the length of incision is determined by the anatomy of Oddi sphincter. The endoscopic approach aims to relieve biliary and pancreatic outflow tract obstruction and pancreatic biliary reflux, and avoid enterobiliary reflux.
胆胰管汇合部是指胆总管末端、主胰管开口及十二指肠乳头之间的区域。该部位的疾病会引起胆胰流出道梗阻，出现胆汁、胰液淤积或胰胆反流，诱发胆结石、胆管炎、胰腺炎等疾病。内镜下括约肌切开是治疗胆胰疾病的重要方式，需要根据Oddi括约肌的解剖来确定切开的部位及长度，在解除胆胰流出道梗阻及胰胆反流的同时，避免肠胆反流的发生。.