Needle-knife sphincterotomy as a precut procedure in patients with non-dilated biliary tract: technical success rate and complication rate

Aims Needle-knife sphincterotomy as a precut procedure (PS) in patients with non-dilated bile duct carries an increased risk of complications. Working hypothesis: A targeted PS with identification of the papillary submucosal common bile duct does not imply a greater risk of complications.