Pnl Technique
The patients were placed in the lithotomy position, and following the insertion of a semirigid ureteroscope (Karl Storz 9-11F, Tuttlingen, Germany) and a sensor guide (PTFE-Nitinol Guidewire with Hydrophilic Tip, Boston Scientific, Marlborough, USA) an open-ended ureteral catheter rwas placed under fluoroscopy guidance. After placing the patients in the prone position, retrograde pyelography was performed, and a percutaneous insertion needle was inserted into the appropriate calyx.Under guidance,28-F Amplatz dilatation (Geotec, Ankara, Turkey) was applied to all patients.Stones were reached using a nephroscope (Karl Storz 26F, Germany), and the stones were fragmented with pneumaticlithotripsy (Elmed, Vibrolith Plus, Turkey). The fragmented pieces were removed from the kidney with stone forceps. A 14-F or 16-F nephrostomy tube was placed in all patients. After fluoroscopy control, antegrade pyelography was performed, and the procedure was terminated.