Stents are exposed to blood after being implanted into coronary arteries. As a foreign body, stent may stimulate the aggregation of various coagulation substances in blood, especially platelets, leading to thrombosis. Stent blockage leads to myocardial infarction. Therefore, aspirin and clopidogrel should be taken after stent implantation to prevent platelet aggregation and thrombosis. After implantation, the surface of the stent will gradually cover the upper layer.
Finally, the skin completely covered by the intima of blood vessels is similar to the surface of normal blood vessels. At this time, the risk of thrombosis is greatly reduced, which takes about six months to one year, so we should stick to taking these two drugs. You should still take aspirin one year after the operation.