Outcome of Digital Cholangioscopy and Laser Lithotripsy for Impacted Biliary Stones

Background and Aims Impacted stones in the bile duct are difficult to extract, and are predictor of failure of conventional endoscopic retrograde cholangiopancreatography techniques including mechanical lithotripsy and large balloon dilatation. Intracorporeal lithotripsy may be an effective technique for these stones. The aim of this study is to report the efficacy and safety of intracorporeal laser lithotripsy for impacted stones in the bile duct. Method This study is retrospective analysis of prospectively collected data. Patients with impacted stones in the bile duct underwent cholangioscopy with spyglass DS system and laser lithotripsy. Outcome measures were proportion of patients with complete clearance of bile duct after the first session, number of sessions required for complete clearance, and the complications. Results Forty-three patients (27 female) with mean age of 56.12 ± 15.16 years underwent digital cholangioscopy and laser lithotripsy. Mean bilirubin value was 1.8 ± 1.6 mg/dL, 20 (46.51%) patients had single stone, 35(81.39%) patients had only bile duct stones, and 8(18.61%) patients had additional stones in cystic duct or intrahepatic biliary radical. Mean size of largest stone was 16.2 ± 4.4mm. Average duration of the procedure was 69.11 ± 28.12minutes, and complete clearance was achieved in 41/43 (95.34%) patients after the first session. Mean number of sessions required for complete clearance was 1.02 ± .26. Postprocedure cholangitis occurred in one patient. Conclusion Intracorporeal laser lithotripsy is an effective and safe modality for the clearance of impacted bile duct stones.