Passive-bending, short-type single-balloon enteroscope for endoscopic retrograde cholangiopancreatography in Roux-en-Y anastomosis patients

Figure 1 Passive bending section. A: A “stick phenomenon” occurs in the horizontal portion of duodenum and at the Treitz ligament in a patient who had undergone Roux-en-Y gastrectomy; B: The “stick phenomenon” is likely to occur when the scope is pushed. However, the passive bending section bends, propelling the scope tip forward, without pushing up the wall of the small intestine.