申请人:Zhao Jonathon Z.
公开号:US20080200421A1
公开(公告)日:2008-08-21
A conjugate between an anti-thrombotic agent and a bioabsorbable polymer is provided. In addition, a method is provided for applying a coating comprising an anti-thrombotic agent and a bioabsorbable polymer conjugate to at least a portion of an implantable device to prevent or reduce the formation of thrombosis on the surface of the device. A first or sub-layer of the coating is prepared by mixing a polymeric material and a biologically active agent with a solvent, thereby forming a homogeneous solution. A second or outer layer comprises an anti-thrombotic heparin-bioabsorbable polymer conjugate. This coating may be applied over the inner drug-containing layers using, for example, a dip coating or spray coating process. After drying, the anti-thrombotic heparin bioabsorbable polymer conjugate remains in the outer layer of the coating, allowing agent from the inner layer to be eluted there through. In addition, the outmost layer prevents the formation of thrombosis, and also serves to modulate the release kinetics of the agent(s) contained within an inner layer(s) of the coating.
提供了一种抗血栓药物与可生物吸收聚合物的共轭物。此外,提供了一种方法,用于将包含抗血栓药物和可生物吸收聚合物共轭物的涂层应用于可植入设备的至少部分表面,以预防或减少设备表面的血栓形成。涂层的第一或次表层通过将聚合物材料和生物活性剂与溶剂混合制备而成,从而形成均匀溶液。第二或外层包括抗血栓肝素-可生物吸收聚合物共轭物。该涂层可以通过浸涂或喷涂工艺覆盖在内部含药层上。干燥后,抗血栓肝素可生物吸收聚合物共轭物保留在涂层的外层,使内层的药物能够通过其释放。此外,最外层防止了血栓形成,并且还用于调节涂层内部层中所含药物的释放动力学。