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Endoscopic management of large bile duct stones by mechanical lithotripsy
Objective:
Our experience in treating large common bile duct stones using Olympus basket mechanical lithotripter (BML 2Q) and Soehendra lithotripter is reported.
Methods:
Between July 1990 and December 1993, twenty two patients with common bile duct stones too large to be extracted by Dormia basket or balloon were treated with BML lithotripter or Soehendra lithotripter.
Results:
The stone diameters ranged from 1.5 to 2.8 cm. Fourteen patients required one session of lithotripsy, four patients two sessions each, and two patients three sessions each. BML lithotripter was used in 14 patients. In the remaining eight patients the stones were fragmented with Soehendra lithotripter when the basket got impacted while attempting extraction. Mechanical lithotripsy was successful in 20 patients (91%). Indwelling stent was used in one patient; one patient underwent surgery.
Conclusion:
Mechanical lithotripsy is safe for the treatment of large common bile duct stones, with a success rate above ninety percent.