A prospective study on endoscopic papillary balloon dilatation and mechanical lithotripsy in treatment of choledocholithiasis: dilatation or lithotripsy first

Objective To investigate endoscopic retrograde cholangiopancreatography (ERCP) in the treatment of large common bile duct stone with endoscopic papillary balloon dilatation (EPBD) first or mechanical lithotripsy first. EPBD first or lithotripsy first were compared for stone removal efficiency and post-ERCP complications. Methods A prospective study of 40 patients with choledocholithiasis from January 2021 to January 2022 was done. Patients were divided into lithotripsy first group and EPBD first group each 20 cases using random number table. Stone remove time, stone removal efficiency (cm3/min), the rate of residual stones and rate of post-ERCP pancreatitis were compared between two groups. Results All cases underwent stone removal one time successfully. There was no statistically significant difference in maximum diameter of stone, single or multiple stone, stone volumes (cm3), time for stone remove and operative time between two groups. The stone removal efficiency (cm3/min) in lithotripsy first group was s