Factors affecting complete stone extraction in the initial procedure in short type single-balloon enteroscopy-assisted endoscopic retrograde cholangiography for patients with Roux-en-Y gastrectomy

This study aimed to evaluate the efficacy and safety of stone extraction in patients who underwent Roux-en-Y gastrectomy using short-type single-balloon enteroscopy (SBE) and to clarify the factors affecting complete stone extraction in the initial procedure.The data of patients with Roux-en-Y gastrectomy who underwent endoscopic stone extraction using short SBE between September 2011 and January 2022 was analyzed.Overall, 85 patients were scheduled to undergo stone extraction. 77 patients were intended stone extraction after successful biliary cannulation. The complete stone extraction success in the initial procedure, overall complete stone extraction success including repeated procedures, and adverse event rates were 68.2% (95% confidence interval [CI], 57.2%-77.9%), 87.1% (95% CI, 78.0%-93.4%), and 8.2% (95% CI, 3.4%-16.2%), respectively. Multiple logistic regression analysis indicated that bile duct diameter affected the success of complete stone extraction after successful biliary cannulation in the initial procedure (odds ratio 0.53, 95% CI, 0.30-0.94, p = .03).Stone extraction in patients with Roux-en-Y gastrectomy using short SBE was effective. Patients with a large diameter bile duct required several sessions for complete stone extraction, suggesting that more dedicated devices are warranted for patients with surgically altered anatomy.