Fig. 3
From: Enlarged fistulotomy of the papilla as access to the biliary tract during ERCP
EFP with identification of the muscle tissue. a failed cannulation with the guide wire; b repositioning of the duodenoscope to visualize the infundibulum of the papilla; c Wide longitudinal incision from the transverse crease; d wide lateral incisions; e identification of the muscular sphincter of the papilla; f sectioning the muscular fibers to expose the common bile duct mucosa; g cannulation of the bile duct; h deep cannulation and contrast injection