Why are stents inserted?A ureteric stent is a small, hollow tube which is put inside your ureter (the tube that drains urine from your kidney to your bladder). It is curled at both ends to keep the upper end fixed inside the kidney, and the lower end in place inside your bladder.
Stents are put in for several reasons; the commonest are:
• blockage of the ureter - the tube draining urine from the kidney to the bladder can be blocked by stones, stone
fragments, scarring, external compression or other factors
• before lithotripsy – to create some space around a stone so that it
will respond better to shockwave treatment
• to allow the ureter to heal – either after injury to the ureter, major
abdominal (tummy) surgery on the bladder or ureter, or after endoscopic surgery within the ureter itself