Ureteroscopy (URS) is used to treat stones in the kidney and ureter. URS involves passing a very small telescope, called an ureteroscope, into the bladder, up the ureter and into the kidney. Rigid telescopes are used for stones in the lower part of the ureter near the bladder. Flexible telescopes are used to treat stones in the upper ureter and kidney. The ureteroscope lets the urologist see the stone without making an incision (cut). General anesthesia keeps you at ease during the URS procedure. Once the urologist sees the stone with the ureteroscope, a small, basket-like device grabs smaller stones and removes them. If a stone is too large to remove in one piece, it can be broken into smaller pieces with a laser or other stone-breaking tools. Once the stone has been removed in whole or in pieces, your health care provider may place a temporary stent in the ureter. A stent is a tiny, rigid plastic tube that helps hold the ureter open so urine can drain from the kidney into the bladder. Unlike a bladder catheter or kidney drainage tube, this tube is within the body and does not need a bag to collect urine. You may go home the same day as the URS and can begin normal activities in 2 to 3 days. If your urologist places a stent, he or she will remove it 4 to 10 days later.