A ureteral<unk>  (pronounced you-REE-ter-ul), or<unk> , is a thin tube inserted into the ureter to prevent or treat obstruction of the urine flow from the kidney. The length of the<unk> s used in adult patients varies between 24 and 30 cm. Additionally,<unk> s come in differing diameters or gauges, to fit different size ureters. The<unk>  is usually inserted with the aid of a cystoscope. One or both ends of the<unk>  may be coiled to prevent it from moving out of place; this is called a JJ<unk> , double J<unk>  or pig-tail<unk> .
Ureteric stent
Ureteric balloon catheter
Ureteroureterostomy
Ureterocutaneostomy
Ureterolysis
Nephrostomy
Percutaneous nephrostomy
Ureterostomy