1. ERCP: pearls of wisdom from master endoscopists
Rohit Singhania, MD, SM 
Gastrointestinal Endoscopy 
Volume 73, Issue 6, Pages (June 2011)
DOI: /j.gie
Copyright © 2011 American Society for Gastrointestinal Endoscopy Terms and Conditions

2. Figure 1
Cannulation of the bile duct. A, Note the trajectory of the catheter superiorly and over the top of the septum that divides the pancreatic duct and bile duct. B, Use of a sphincterotome. Note that the endoscope is tip deflected away from the papilla to allow enough catheter to be inside the duodenum for proper bowing.
Gastrointestinal Endoscopy  , DOI: ( /j.gie )
Copyright © 2011 American Society for Gastrointestinal Endoscopy Terms and Conditions

3. Figure 2
Cannulation of the pancreatic duct. Note the trajectory of catheter horizontally and under the septum that divides the pancreatic duct and bile duct. Also, note that the endoscope located more proximally than in Figure 1 (looking en face at the papilla).
Gastrointestinal Endoscopy  , DOI: ( /j.gie )
Copyright © 2011 American Society for Gastrointestinal Endoscopy Terms and Conditions