Sphincterectomy of sphincter of oddi is performed at
Transduodenal Sphincterectomy This cut is made Superiorly (at 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 Ref: Sabiston 20th edition Pgno :1496
3 O'clock position
6 O' clock position
9 O'clock position
11 O'clock position
G.I.T