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.

Figure 2 Carbon dioxide inflation guidance. A: The tip of the single balloon enteroscope is located at the anastomotic site of the afferent loop; B: Carbon dioxide is guiding the correct direction and blind end (arrows).

Figure 3 Therapeutic intervention. A: Radiographic image showing wire-guided mechanical lithotripter; B: Radiographic image showing wire-guided 4-wire retrieval basket; C: Insertion of a wire-guided 4-wire retrieval basket; D: Insertion of a wire-guided intraductal ultrasonographic probe into the intact papilla.