Treatment of complicated renal calculi under percutaneous nephrolithotomy with ultrasonic and pneumatic lithotripter

Objectives To evaluate the methods and efficacy of percutaneous nephrolithotomy with ultrasonic and pneumatic lithotripter(EMS Ⅳ)in the treating of complicated renal calcali.Methods 512 renal unites with complicated renal ealeali received percutaneous nephrolithotomy performed by ultrasonic and pneumatic lithotripter.Results 89.5%stone-free rate wan achieved one-stage minimally invasive percutaneous nephrolithotomy.Average opcrative time was 115 minutes.Neither the pheumothorax nor the bowel hurts complications were noted in the patients.Conclusions Invasive percutaneous nephrolithotomy is safe and effective in the treatment of major renal calcalli.High stone free rate,less invasion easy recovery and shot hospitalization stay are its merits.It also has advantages of treating the patients with residual calculi. Key words: Kidney Calculi; Lithotripsy; Endoscopy