It is a process in which a small scope (similar to a flexible telescope) is inserted into the bladder and the ureter, and it is used to diagnose and treat a range of diseases in the urinary tract. This treatment is called ureteroscopy. It enables the urologist to look into the ureter, locate the stone, and remove it in the case of ureteral stones, which are stones that are found in the ureter. The stone is grasped by the surgeon with the assistance of a small wire basket that is inserted into the lower ureter through the bladder. The stone is then extracted from the body. This is an outpatient operation that may or may not involve the insertion of a stent (a tube that is placed in the ureter to hold it open).