<prompt> Sphincterotomy of sphincter of Oddi is performed at:3 oclock position6 oclock position9 oclock position11 oclock position  <response>: TRANSDUODENAL SPHINCTEROPLASTY This cut is made superiorly at the 11o clock position for 4 to 5 mm. The sphincter is incised at the 11-Oclock position to avoid injury to the pancreatic duct. 