Minimally invasive percutaneous nephrolithotomy with pneumatic lithotripsy guided by B-type ultrasound for the treatment of upper urinary calculi

Objective To summarize the experience of minimally invasive percutaneous nephrolithotomy(MPCNL) with pneumatic lithotripsy under B-type ultrasound guidance for the treatment of upper urinary calculi,and improve the skill of operation.Methods 186 patients with kidney and ureteral calculi underwent MPCNL with pneumatic lithotripsy under B-type ultrasound guidance.procedure time,blood loss and the stone-free rate were analyzed retrospectively.Results The minimally invasive percutaneous renal access of 18F was successfully established in all patients under B-type ultrasound guidance and immediate lithotripsy was performed.The average operation time was 68 minitues,and average blood loss was 70ml.Stone free rate was 90.32%.No severe complication occurred.Conclusions MPCNL with pneumatic lithotripsy appears to be efficacious and safe for disintegrating and removing upper urinary tract calculi under B-type ultrasound guidancd with exact orientation,even instead of X-ray guidance.