Hello Arthur S,
A stent is a tiny cylindrical tube implanted in your coronary vessels (the arteries that supply your heart with blood) to improve the blood supply to your heart. Here is a link to a good picture of a stent that should give you perspective on its size.
There are actually many different kinds of stents, differing in size and application, that doctors use in medical practice. Stenting is a term that, at its most general, means to keep open or reopen a hollow tube in the body. Any hollow tube, from your esophagus to your colon (with your aorta in the middle), can be stented!
To your health,
Do you mean Stent,if you do it looks like a Very small round wire mesh