申请人:Conor Medsystems, Inc.
公开号:EP2272544A1
公开(公告)日:2011-01-12
An implantable medical device comprises: an implantable device body having a mural surface (26) and a luminal surface (24) and a plurality of holes (20) traversing both the mural and luminal surface; a therapeutic agent, a matrix (40), and a barrier layer (30) contained in each of the plurality of holes; wherein the holes each have a luminal opening and a mural opening and the barrier layer is positioned across the luminal opening, and the therapeutic agent is primarily delivered through the mural opening of the hole; wherein the therapeutic agent is present in both the barrier layer and the matrix, at different local concentrations, and the matrix is created in a stepwise manner, such that a concentration gradient of the therapeutic agents exists in the matrix.
一种植入式医疗设备包括具有壁面 (26) 和管腔表面 (24) 的可植入设备本体,以及穿过壁面和管腔表面的多个孔 (20); 包含在多个孔中的治疗剂、基质 (40) 和隔离层 (30);其中,每个孔都有一个管腔开口和一个壁面开口,阻挡层横跨管腔开口,治疗剂主要通过孔的壁面开口输送;其中,治疗剂以不同的局部浓度存在于阻挡层和基质中,基质以阶梯方式形成,从而使基质中存在治疗剂的浓度梯度。