Drug-delivery endovascular stent and method for treating restenosis

The invention claims a delivering medicine the blood vessel inner bracket and it is used for treating restenosis method of. Especially the invention claims a radiation shape can open the blood vessel inner bracket which is designed into the vein damage position to inhibit the site the concentration of the narrow use method thereof and preparation method of the vascular stent. Said supporting frame comprises one or more metal wire formed by the radiation shape can open body and attached to the wire or the wire formed on the outer surface of the liquid it does not melt machine fixed layer. In the bracket of the medicine coating layer is substantially free of the polymer and restenosis medicine composition which comprises a poured into the fixed layer in the substrate and substantially continuous medicine of the surface layer the point in the blood vessel with blood vessel wall directly contact. Resisting the restenosis medicament from the surface layer is released into the blood vessel site speed only by the drug coating composition for determining.