Bile duct cannulation
Sometimes bile duct cannulation requires orientation of the cannula in a cephalad direction. This can be accomplished by using a sphincterotome. Tightening the cutting wire bows the cannula upward and produces a more cephalad orientation for the tip of th
Proper cannulation angle
The proper cannulation angle for the pancreatic duct is nearly at right angles to the duodenal wall, while bile cannulation requires a more cephalad orientation.
View of the ampulla through a duodenoscope
View of the ampulla through a duodenoscope. Cannulation requires positioning the catheter at a 6 o’clock location.