A synthetic wire mesh tube is placed inside the renal artery to prevent the narrowing of the blood vessel. This in turn helps to check the low supply of blood to any organ which the artery with a constriction serves. A Renal Stent placement is done to treat whenever there is a blockage in the renal artery i.e. the artery feeding blood to the kidneys. This blockage generally occurs in the ureter of the kidneys. The Stent is held in place by the two coils which are present in each end of the stent thus preventing it from any kind of movement away from the point of application.
A complete medical imaging and its analysis of the patient is done by the doctor when the doctor feels it is necessary to go for the stent placement. This is done in order to study the network of the blood vessels surrounding the kidneys. The doctor can also recommend an angiogram along with the imaging if it fits his needs. In an angiogram, tracer dyes are used to determine the path of the flow of the blood.
When the renal stent placement has to be carried out, the patient is asked to lie on an X-ray table where an intravenous line is started. This is done so that there is easy flow of the drugs in fluids which are administered to the patient later. One member of the angioplasty department administers a local anaesthesia which numbs the area of the body where the renal stent operation has to be carried out. Next, a small incision is made. This incision is used to insert the thin and flexible Catheter. Now using an X-ray guiding system this Catheter is moved within the artery until it reaches the point of constriction or where the artery is becoming narrow or is getting blocked.
A tiny balloon is found on the tip of the catheter. This balloon, on reaching the point of constriction, is made to expand. The expansion of this balloon forces the plaque towards the walls of the artery which results in the expansion of the artery at the point and free flow of the blood starts through the blood vessel. The catheter then functions as a delivery tube for the transfer of the stent at the point where blockage is present. The expandable stent made of wire mesh is then placed inside the artery thus completing the whole process of stent placement.
A renal stent placement is painless because the patient is administered with local anaesthesia. Also, the whole process is safe and there is no kind of risk involved whatsoever although there are many precautions that the patient needs to take. Along with the precautions the patient needs to be extra careful regarding the instructions that the doctor gives regarding the stent placement both before and after the operation. The patient is also advised to visit the doctor periodically and on a regular basis.