At the end of your surgery, your doctor places a stent in your ureter using a scope or X-ray. An adult stent is typically 22 to 30 centimeters in length, extending from your kidney to your bladder, with a coil on each end to hold the stent in place. The stent dilates your ureter to help urine pass from your kidney to your bladder. Your doctor may leave a string attached to the stent to help remove the stent following surgery, and may tape the string to your leg or stomach.
Your doctor may also place a stent before surgery to treat an infection, a stricture or an obstruction from a stone, or to help dilate a narrow ureter.