Sphincterotomy of sphincter of Oddi is performed at:
TRANSDUODENAL SPHINCTEROPLASTY This cut is made superiorly (at the 11'o clock position) for 4 to 5 mm. The sphincter is incised at the 11-O'clock position to avoid injury to the pancreatic duct.
3 o'clock position
6 o'clock position
9 o'clock position
11 o'clock position
Bile duct