A ureteral stent, or ureteric stent, is a thin tube inserted into the ureter to prevent or treat obstruction of the urine flow from the kidney.
The length of the stents used in adult patients varies between 24 and 30 cm. Additionally, stents come in differing diameters or gauges, to fit different size ureters. The stent is usually inserted with the aid of a cystoscope. One or both ends of the stent may be coiled to prevent it from moving out of place; this is called a JJ stent, double J stent or pig-tail stent.
Ureteral stents are used to ensure the openness of a ureter, which may be compromised, for example, by a kidney stone or a procedure. This method is sometimes used as a temporary measure, to prevent damage to a blocked kidney, until a procedure to remove the stone can be performed. Indwelling times of 12 months or longer are indicated to hold ureters open, which are compressed by tumors in the neighborhood of the ureter or by tumors of the ureter itself. In many cases these tumors are inoperable and the stents are used to ensure drainage of urine through the ureter. If drainage is compromised for longer periods, the kidney can be damaged.
Stents may also be placed in a ureter that has been irritated or scratched during a ureteroscopy procedure that involves the removal of a stone, sometimes referred to as a 'basket grab procedure'. Stents placed for this reason are normally left in place for about a week. These stents ensure that the ureter does not spasm and collapse after the trauma of the procedure.
1. More Softer, made by the latest composite material and let it more softer
2. More Smoother, fully covered with a hydrophilic coating to make it smoother and easier to use
3. Easier to take out, the unique design of the tube extraction line makes it easier to take out the tube
4. More elastic, high-quality materials at the same time provide excellent elasticity and toughness
5. Can be left for a longer time, the new material has better tissue compatibility, and can be left in the body for a longer time, up to 120 days
Advantages of clinical use:
1. Placed in the ureter to act as a stent and internal drainage
2. Relieve temporary obstruction caused by ureteral inflammation and edema
3. Effectively prevent postoperative wound leakage and stenosis of ureter
4. Avoid bleeding infection caused by nephrostomy
5. There is no external drainage tube restriction, patients can get out of bed early, which is conducive to postoperative recovery
6. Long-term effect and long-term retention