Shock Wave Lithotripsy
ProcedureExtracorporeal shock wave lithotripsy will be performed using a third-generation electromagnetic lithotripter The focal depth is 110 mm; the focal area is 7 mm (radial) and 45-50 mm (axial), and the focal pressure is 6-30 MPa). The procedure is performed in a supine or prone position without anesthesia. Stone localization and simultaneous real-time monitoring during the process will be performed by ultrasound). The shock frequency is 60-90 (shock waves/min). The total number of shock waves applied for one session is between 1500 and 2500 waves, or the session is stopped at a significant stone fragmentation is detected. The voltage applied per session ranged from 10 to 16 kV with stepwise power ramping strategy. All procedures in the SWL group are outpatient procedures.