A JJ stent is a specially designed hollow tube, made of a flexible plastic material that is placed in the ureter. The ureter is the natural tube that transmits urine from the kidney to the bladder. The length of the stents used in adult patients varies between 24 to 30 cm.
There are different types of stents, and some of these differences allow a stent to provide different benefits depending on the situation of the .
What’s the reason for having a JJ stent?
A JJ stent may be placed for several reasons.
It allows urine to flow from the kidney to the bladder even when the ureter is blocked for one reason or another. This way, the kidney keeps working and is not damaged by being obstructed and avoids the severe pain that can occur when a kidney does not drain properly. The chance of an infection is also reduced significantly.
A stent protects the ureter and allows the ureter to heal even when damaged. If a stent is not placed and the ureter is hurt in some way or other, it can become too narrow when it heals forming what is called a stricture. Having a stent can prevent that from happening and makes it more likely that the ureter will work well afterwards.
Sometimes, a stent is placed because it makes a narrow ureter wider over a period of time. This can be important when access through the ureter is needed to pass instruments or remove stones. This would typically occur when an attempt to go up the ureter to get a stone has failed because it was too narrow. Inserting a stent makes it more likely that later attempts to get up the ureter will be successful.