Objective To investigate the therapeutic effects of endoscopic retrograde cholangiopancreatography(ERCP),endoscopic sphincterotomy(EST)and endoscopic naso-biliary drainage(ENBD)in choledocholithiasis.

• 目的总结应用逆行胰胆管造影术(ERCP)、内镜括约肌切开术(EST)和鼻胆管引流术(ENBD)治疗胆总管结石的疗效。