Laser lithotripsy and enhanced shock wave lithotripsy will also be available for subsequent treatments of residual stones.

Bile peritonitis developed in the patient in whom access was lost and a surgical cholecystostomy was done, followed by a further percutaneous removal of residual stones.

Stone recurrences in five patients are believed to be the result of residual stones as they reformed by the six month follow up examination and each of the post procedure contrast studies had shown a filling defect in the neck of the gall bladder or cystic duct.