A Single-Center Clinical Study on the Efficacy and Safety of VISOR

"Investigational ureteroscope with three integrated functions:~1. Real-time pressure control: Continuous renal pelvic pressure monitoring with auto-adjustment of irrigation/aspiration flow to maintain pressure \<30 mmHg (safety threshold)~2. Simultaneous lithotripsy \& fragment removal: Holmium laser lithotripsy (200-365 μm fiber) coordinated with suction through working channel~3. Single-pass stone clearance: Designed to reduce residual fragments requiring secondary procedures~Distinguishing features vs conventional ureteroscopes:~1. Eliminates need for separate suction devices~2. Prevents intraoperative washout failure causing obscured vision~3. Patent-pending pressure sensor"