Abstract: Objective:To explore the safety and efficacy of visual puncture micropercutaneous nephrolithotomy for treatment of renal stones in pediatric patients.Methods:The clinical data of 15 pediatric patients with renal stones treated with visual puncture micropercutaneous nephrolithotomy in our department from June 2017 to August 2018 were enrolled.All patients were performed holmium laser lithotripsy of visual puncture micropercutaneous nephrolithotomy under general anesthesia and the operation time，postoperative complications and hospitalization time were evaluated.The urinary CT was reviewed 4 weeks after the operation to evaluate the stonefree rate.Results:All patients were performed holmium laser lithotripsy of visual puncture micropercutaneous nephrolithotomy successfully.The average operation time was（68.43±11.45）min.The average decrease of hemoglobin was（8.50±1.70）g/L，and none of cases required blood transfusion.The average day of postoperative hospitalization was（5.36±0.84）d.Postoperative fever occurred in 2 patients（T＞38.5℃），which was a complication of Clavien grade II，and they were improved after intensive antiinfection treatment according to the drug sensitivity results.The stonefree rate at 4 weeks was 86.67%（13/15）.Conclusion:Visual puncture micropercutaneous nephrolithotomy for the treatment of renal stones in pediatric patients is safe and effective，with low complications，and achieve a satisfactory stonefree rate，which can be popularized in clinical practice.

Key words: visual puncture micro percutaneous nephrolithotomy, pediatric, renal stone