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    • 6. 发明公开
    • Implantable medical device with beneficial agent concentration gradient
    • 可植入的医疗装置,其包含治疗物质KONTINUERLICHEM梯度
    • EP2289571A1
    • 2011-03-02
    • EP10010594.9
    • 2004-03-29
    • Conor Medsystems, Inc.
    • Park, KinamShanley, John F.Parker, Theodore L.
    • A61L27/34A61L29/08A61L29/16A61L31/12
    • A61L31/08A61L31/041A61L31/10A61L31/16A61L2300/60A61L2300/604
    • A method of forming an implantable medical device configured to release at least one therapeutic agent therefrom comprises disposing the therapeutic agent in a matrix affixed to a body of the implantable medical device, wherein a concentration of the at least one therapeutic agent in the matrix varies as a continuous gradient relative to a surface of the implantable medical device body, the method comprising: forming a homogeneous solution comprising a polymeric binder and a solvent; evaporating the solvent in the homogeneous solution, thereby forming a matrix; exposing the matrix to a solution comprising the therapeutic agent for a time sufficient to produce a partial diffusion of the therapeutic agent into the matrix such that the concentration of the therapeutic agent varies in the matrix; and affixing the matrix to the implantable medical device body.
    • 形成被配置为从包括释放至少一种治疗剂有设置在固定到所述可植入医疗装置的主体上的基体中的治疗剂的可植入医疗装置的,worin所述至少一种治疗剂的浓度在基质中那样变化的方法 连续相对于所述可植入医疗设备主体的表面上的梯度,所述方法包括:形成一均匀的溶液,其包含聚合物粘合剂和溶剂; 蒸发在均匀溶液中的溶剂,由此形成基质; 基质暴露于溶液,其包含足够的时间,以产生所述的治疗剂的局部扩散到检查做治疗剂的浓度在基质中而变化的矩阵的治疗剂; 以及将所述基质的可植入医疗装置主体。