Treatment of renal calculi with minimally invasive percutaneous nephrolithotomy

Objective:To evaluate the efficiency of minimal invasive percutaneous nephrolithotomy in treating renal calculi.Method:We retrospectively investigated 235 patients with renal calculi who were treated with minimally invasive percutaneous nephrolithotomy from July 2001 to June 2003. Of 235 cases, the diameter of the stone is from 1.5 cm to 1.7 cm, sole calculus in 195 cases, multiple calculi in 85 cases, respectively. Simutaneously, staghorn calculi in 60, bilateral renal calculi in 40, solitary kidney in 9, and 23 cases had ever received open nephrolithotomy.Result:All cases were performed one-stage procedure, one session procedure in 183, 2 sessions or more in 52. Single tract in 198, multiple tracts in 37, respectively. The stone-free rate was 85%. Average operative time was 2 hours. Only 7 cases suffered from massive hemorrhage intraoperatively or postoperatively, who were managed by conservative treatment. The mean hospitalization time was 10 days.Conclusion:Minimally invasive PCNL is an effective technique in renal calculi treatment. The patients had less morbidity and quickly return to preoperative activity.