Background and study aims No standard procedure for endoscopic retrograde cholangiopancreatography is available for patients with Roux-en-Y hepaticojejunostomy (RYHJ) with side-to-end hepaticojejunostomy. We therefore explored methods of efficient scope insertion at a hepaticojejunostomy site. Patients and methods Patients with suspected biliary disease were prospectively enrolled. Based on two fluoroscopic images obtained on scope insertion into each lumen of a two-pronged Roux-en-Y anastomosis, we selected the lumen in which the distal end of the scope progressed toward the patient's liver or head. The accuracy of this method for selecting the correct lumen leading to the hepaticojejunostomy site was investigated. Results Of the 33 included patients, successful insertion to the hepaticojejunostomy site was achieved in 32 (97%), 26 (81%) of whom had undergone the imaging method. The accuracy of the method was 88% (23/26). The time required for insertion between the anastomotic site and the hepaticojejunostomy site was shorter when the lumen selection had been correct (13 minutes [7-30] (n=23) vs. 18 minutes [8-28] (n=9); P =0.95). Conclusion This method based on two fluoroscopic images was useful for achieving efficient scope insertion in patients with RYHJ. Trial registered at University Hospital Medical Information Network Clinical Trials Registry (UMIN000014183).
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