[Minimally invasive percutaneous nephrolithotomy under ultrasound and X-ray guidance for treatment of complicated renal calculi].

Objective: To evaluate the therapeutic effect of minimally invasive percutaneous nephrolithotomy (MPCNL) under ultrasonic and X-ray guidance in the treatment of complicated renal calculi.

Methods: A retrospective analysis was conducted among 36 patients undergoing MPCNL under ultrasonic and X-ray guidance for complicated renal calculi. The general clinical data, stone size, operative time, blood loss, complications and stone clearance rate were analyzed.

Results: Double working channel was established accurately under ultrasonic and X-ray guidance in the 36 cases. The stone clearance rate in one treatment session was 80.56%, with an average operation time of 100 min and a mean hospital stay of 13.5 days (13-15 days) after operation. A second lithotripsy was performed in 5 cases and no residual renal calculi were found 1 month after the operation. Sixteen out of the 18 patients with preoperative elevation of serum creatinine recovered normal creatinine level after the operation.

Conclusion: MPCNL under ultrasonic and X-ray guidance is safe and effective for treatment of complicated renal calculi and is associated with few postoperative complications.