Application value of ultrasound-guided percutaneous nephrolithotripsy in treatment of renal calculi without hydronephrosis

Objective To evaluate the application value of establishment of skin-kidney access under ultrasound guidance,and percutaneous nephrolithotripsy in treatment of renal calculi with non-dilated collecting system.Methods One hundred and fifty-seven patients with renal stone without hydronephrosis were enrolled in this study.A stent was inserted into the pelvis throngh cystoscope,and saline was instilled or injected to dilate collecting system.The skin-kidney access was obtained by ultrasound guidance.Results All the patients were punctured successfully by one pricking.Phase I lithotripsy was performed in 141 cases and delayed phase II lithotripsy was performed in 11 cases with one work-tunnel,the second percutaneous nephrolithotriosy work-tunnel was established in phase I lithotripsy in 5 cases.There were no severe complications,such as pneumothorax and injury of abdominal organs in the patients.Conclusion Treatment of renal stone without hydronephrosis by percutaneous nephrolithotriosy under ultrasound guidance is accurate,safe and convenient,it can be the first method in clinic.