Renal stent procedure
A stent is a kind of specially designed hollow tube that is placed inside the ureter. It is normally made up of a flexible plastic material. This often helps to relieve the patient of his pain. The top end of the stent is coiled in the kidney and the lower end is inside the bladder. They are made flexible so that they can bear any physical body movement. A number of different methods help in the diagnosis of the obstruction. These include cystoscopy, ultrasonography, computed tomography, pyelography. No food or drink is allowed to a patient prior to the procedure of stenting.
There are certain complications that are associated with ureteral stenting. These may include the following complications :
1. Bleeding : this is usually minor and is easily treated, but occasionally it does require transfusion.
2. Catheter migration or dislodgement .This may require some readjustment.
3. Coiling of the stent within the ureter. This may cause lower abdominal pain or flank pain at the time of urination, there is frequent urination or even blood in the urine.
4. There can also be some introduction or worsening of infection.
5. There can be the penetration of some adjacent organs like the bowel, gallbladder, or lungs.
Normally, a ureteral stent restores the normal flow of urine from the kidney to the bladder. Post operation urine flow is monitored to ensure that the stent has not been dislodged or obstructed. A renal stent or a kidney stent is a thin tube that is normally inserted into the ureter in order to prevent or treat the obstruction of the urine flow in the kidney. The length of the stent used in the adult patients may vary around 24 to 30 cm in its length. The stents are also in various forms and diameters to fit the different sized ureters. The renal stent procedure involves that the stents are usually inserted into a patient with the help of a cyctoscope. Mostly one or both the ends of the stent may be coiled in order to prevent it from moving out of the place. Such a type of stent is called a double stent or a pig tail stent.
Medtronic AVE renal stents are flexible and are also very strong. Each stent is first very carefully polished for a smooth surface and are then made of medical-grade stainless steel and further shaped to allow them to pass easily through the patient’s arteries on a specially designed balloon catheter. The renal stent is a sort of a mesh-like tubular metal structure implanted in a renal artery that is either blocked or may become one due to the build up of the plaque. The stent acts like a scaffold in order to hold the vessel open so that proper blood flow can be maintained. The stent is attached over a deflated balloon, which is then attached to a thin flexible tube. The tube helps to deliver the stent to the affected area of the coronary artery of the patient.