LAUSR

Objectives： We conduct a study to assess the outcome of Micro-Ultrasonic probe combined with ultrasound-guided mini-percutaneous nephrolithotomy for upper ureteral and renal stones. Methods：The data of 119 patients(123 kidney units) underwent Micro-Ultrasonic lithotripsy combined with mini-percutaneous nephrolithotomy was retrospective reviewed. The group included 96 males and 23 females. All procedure of puncture and dilation were guided by ultrasound solely. The data was analyze by SPSS. Results：The mean operation time was 32.6 minutes (range, 10 - 110 minutes). The mean time of lithotripsy and stone removal was 14.5 minutes (3 - 100 minutes). The mean postoperative length of stay was 2.7 days (1 - 7 days). Besides, stone free rate of discharge was 95.9% (118/123). The mean hemoglobin drop was 11.6 mg/dL (range, 1-26 mg/dL). Grade I, II and IIIa complications were observed in 4, 1 and 1 patients, respectively. Subgroup analyze was done to compare the outcomes of 20mm or less vs 21mm or more calculi. There was a longer operation duration (40 vs 29 minutes) and lower stone free rate in the 21mm or more calculi subgroup. Conclusions：Micro-Ultrasonic probe combined with ultrasound-guided mini-percutaneous nephrolithotomy is an effective and safety procedure to treat patients with upper ureteral and renal stones with higher stone free rate but lower complications.