RESUMEN
PURPOSE: Retrograde migration of stone fragments is common when performing lithotripsy. A new device, the NTrap(R), is a device that prevents stone migration and it extracts calculi and other foreign bodies in the urinary tract. The aim of this study was to assess the efficacy and safety of ureteroscopic stone removal by using the NTrap(R). MATERIALS AND METHODS: From January 2006 to December 2006, 64 consecutive patients underwent endoscopic lithotripsy by using the NTrap(R), rigid ureteroscopy(8.6Fr) and pneumatic lithoclast. We analyzed the success rate of stone removal and the complication rate. RESULTS: The mean stone size and mean operation time were 9.36mm and 32 minutes, respectively. The overall stone-free rate was 100% and no patient had residual fragments greater than 3mm and they didn't require auxiliary treatment. The most common complications were gross hematuria and pain. CONCLUSIONS: The NTrap(R) is new ureteroscopic instrument that's a highly effective, safe modality for the treatment of ureteral stone.