Stent for percutaneous coronary intervention coated with drugs for the prevention of vascular restenosis

摘要

Percutaneous coronary intervention stent for coating the restenosis preventing agent according to this invention, the taking scratches on the surface, and a number form a fine pit (well) the pit of the plurality of struts (strut) constituting the stent (1) as a coating for prevention of vascular restenosis drug (14) All the surfaces of the strut, including, in particular, a plurality of struts that was associated with a staggered arrangement (11, 21) are made of a ring (loop) formed in the circumferential direction of the first ring structure 10 and the second ring structure and having a 20 in a plurality of repeated pattern, each of the first ring structure (10) and second ring structure (20) are connected to each other by a plurality of bridge 30 do. The first ring structure rounded tip 12 having a strut that is pharmaceutically charged ball (12a) portions meet (10) is formed on the surface of charged groove (11a) The agent of the first ring structure, the strut 11 of the It is formed. Stents coated with restenosis preventing agent according to the present invention, a large amount of restenosis prevention drug to drug loading hole (12a) formed on the surface of drug loading groove (11a) and rounded ends (12) formed on the strut (11) stores is released slowly over time has the advantage of being capable of exerting a sufficient sustained drug during the period concerned is restenosis.