A stent is usually removed after two or three days after an uncomplicated ureteroscopy, according to Ohio State University Department of Urology. It usually stays in for about a week after kidney stone surgery, though many patients keep the stent in for a longer period.
If a patient has been given a long-term stent, it is replaced after three months, says Ohio State University Department of Urology. It is important to replace stents on schedule. Stents left in the body begin to form stones, which makes them more difficult to remove when the time comes.
Stents are placed to relieve obstructions due to cancer or kidney stones, to help the ureter heal after an operation or to dilate it before a ureteroscopy, says Ohio State University Department of Urology.