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- Fri Jan 04, 2008 11:17 pm
I have an interesting question. After having a heart attack, and a stent has been implanted, when is a proper time to actually remove it from the clogged artery?
| Dr. A. Madia
- Tue Mar 04, 2008 1:35 am
Stent is a mesh like structure, it is put inside the coronary artery in a place where there was a blockage and which was dilated open by a balloon. Placing a stent there will will act as a scaffold and will prevent the opened blockage from collapsing back and cause a re-stenosis.
The mesh like metal filaments of the stent get gradually covered by the cell lining of the artery. [Endothelization]. This is actually the goal, and is quite beneficial as the foriegn body element of the stent then will not be exposed to the blood clotting components and thus will prevent a thrombosis.
So form this it is quite obvious that a stent placed in a coronary artery can never be removed.
However, a new category of stents are in the offing, called 'Biodegradable Stent'. As the name implies, the stent is of such a material that it gets 'metabolised' and gets absorbed after a certain period of time. This occures well after the stent has served its purpose and Endothelisation has occured.