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

Figure 8 Biliary cannulation using double-balloon endoscopy in a patient with papilla. A: Papilla when the blind end was accessed; B: Locating papilla in 6 o’clock direction in the monitor, and performing cannulation adjusting the axis of catheter into 12 o’clock direction along the biliary duct.