Patent ID: 9089446
Filing Date: 2015-07-28
Classification: A61F

Abstract:
1. A coronary artery vascular stent with drug-carrying slots, comprised of a plurality of main supporting unit rings and connecting rods at the proximal, distal and in the intermediate portion of the stent, said main supporting unit ring consists of a plurality of unit waves, the unit waves include wave rods, wherein exterior surfaces of the unit wave rods have drug-carrying slots, characterized in that the accumulative slot-length of the drug-carrying slots covers 60%-75% of the total wave rod length of the main supporting unit rings, and that the connecting rods have no drug-carrying slots, each of the unit waves consist of a reinforcement ring, a straight rod segment and a transition segment connecting the reinforcement ring and the straight rod segment, the straight rod segment and the transition segment are 5-15% wider than the reinforcement ring, the unit wave in the intermediate portion of the stent is comprised of two types of wave shapes, wherein the wave shape length of on type is shorter than that of the other type, and the wave shape length of the one type is 25-35% shorter than that of the other type.