Review of diagnostic and therapeutic endoscopic retrograde cholangiopancreatography using several endoscopic methods in patients with surgically altered gastrointestinal anatomy

Figure 9 Biliary cannulation using single-balloon endoscopy in a patient with papilla. A: Papilla when the blind end was accessed; B: Locating papilla in 8-9 o’clock direction in the monitor, and performing cannulation adjusting the axis of catheter into 3 o’clock direction along the biliary duct.