During ureteroscopy with laser lithotripsy, your urologist passes a thin, flexible scope through the urethra and bladder and into the ureter or kidney, so no external incision is usually required. Once the stone is located, a specialized laser is used to break it into smaller fragments. Some pieces may be removed during the procedure, while very small fragments may pass naturally afterward. A temporary ureteral stent may be placed to keep urine flowing freely and help the ureter heal. The stent is typically removed after your physician determines it is no longer needed.