A Randomized Controlled Trial of Patient Positioning During Endoscopic Retrograde Cholangiopancreatography (ERCP) Procedures: A Comparison Between Semi-Prone- and Prone-Positioned Patients.

The prone "swimmers" position is preferable for endoscopic retrograde cholangiopancreatography (ERCP) as it provides the best visualization for selective bile duct cannulation. However, "swimmers" position does not comply with best-practice patient positioning guidelines. Our objective was to determine whether the semi-prone patient position was suitable for ERCP without negatively influencing the outcomes of the procedure.