COATED IMPLANTABLE MEDICAL DEVICE
    44.
    发明申请
    COATED IMPLANTABLE MEDICAL DEVICE 有权
    涂层可植入医疗器械

    公开(公告)号:US20080183268A1

    公开(公告)日:2008-07-31

    申请号:US11965385

    申请日:2007-12-27

    IPC分类号: A61F2/82

    摘要: A coated implantable medical device 10 includes a structure 12 adapted for introduction into the vascular system, esophagus, trachea, colon, biliary tract, or urinary tract; at least one coating layer 16 posited on one surface of the structure; and at least one layer 18 of a bioactive material posited on at least a portion of the coating layer 16, where the coating layer 16 provides for the controlled release of the bioactive material from the coating layer. In addition, at least one porous layer 20 may be posited over the bioactive material layer 18, where the porous layer includes a polymer and provides for the controlled release of the bioactive material therethrough. Preferably, the structure 12 is a coronary stent. The porous layer 20 includes a polymer applied preferably by vapor or plasma deposition and provides for a controlled release of the bioactive material. It is particularly preferred that the polymer is a polyamide, parylene or a parylene derivative, which is deposited without solvents, heat or catalysts, and merely by condensation of a monomer vapor.

    摘要翻译: 涂覆的可植入医疗装置10包括适于引入到血管系统,食道,气管,结肠,胆道或尿道中的结构12; 至少一个涂层16位于该结构的一个表面上; 以及至少一层生物活性材料层18,其被定位在涂层16的至少一部分上,其中涂层16提供生物活性材料从涂层的受控释放。 此外,至少一个多孔层20可以位于生物活性材料层18上,其中多孔层包括聚合物,并且通过其提供生物活性材料的受控释放。 优选地,结构12是冠状动脉支架。 多孔层20包括优选通过蒸气或等离子体沉积施加的聚合物,并提供生物活性材料的受控释放。 特别优选的是,聚合物是聚酰胺,聚对二甲苯或聚对二甲苯衍生物,它们不经溶剂,热或催化剂沉积,并且仅通过单体蒸气的冷凝而沉积。

    Coated implantable medical device
    45.
    发明授权
    Coated implantable medical device 有权
    涂层可植入医疗器械

    公开(公告)号:US06918927B2

    公开(公告)日:2005-07-19

    申请号:US10000659

    申请日:2001-10-31

    摘要: A medical device (10) includes a structure (12) adapted for introduction into a patient, the structure (12) being formed of a preferably non-porous base material (14) having a roughened or textured surface (16). The structure (12) is conveniently configured as a vascular stent with a base material (14) of stainless steel, nitinol or another suitable material. The medical device (10) also includes a layer (18) of a bioactive material posited directly upon the roughened or textured surface (16) of the base material (14) of the structure (12). The surface (16) of the base material (14) is roughened or textured by etching or by abrasion with sodium bicarbonate or another suitable grit. A preferred roughened or textured surface (16) is thought to have a mean surface roughness of about 10 μin. (about 250 nm) and a surface roughness range between about 1 μin. and about 100 μin. (about 25 nm and about 2.5 μm). The particularly preferred use of sodium bicarbonate as the abrasive to provide roughness or texture to the surface (16) of the base material (14) of the structure (12) is additionally advantageous in the low toxicity of the sodium bicarbonate to production workers, the ease of product and waste cleanup, and the biocompatibility of any residual sodium bicarbonate.

    摘要翻译: 医疗装置(10)包括适于引入患者的结构(12),所述结构(12)由具有粗糙或纹理表面(16)的优选无孔基材(14)形成。 结构(12)方便地构造为具有不锈钢,镍钛诺或其它合适材料的基础材料(14)的血管支架。 医疗装置(10)还包括直接位于结构(12)的基底材料(14)的粗糙或纹理表面(16)上的生物活性材料层(18)。 基体材料(14)的表面(16)通过蚀刻或用碳酸氢钠或另一种适当的砂粒磨损而粗糙化或纹理化。 优选的粗糙或纹理表面(16)被认为具有约10μin的平均表面粗糙度。 (约250nm),表面粗糙度介于约1μM之间。 约100多个。 (约25nm和约2.5μm)。 特别优选使用碳酸氢钠作为研磨剂以对结构(12)的基础材料(14)的表面(16)提供粗糙度或织构,另外在碳酸氢钠对生产工人的低毒性方面也是有利的, 易于产品和废物清理,以及任何残留碳酸氢钠的生物相容性。

    Coated implantable medical device
    46.
    发明授权
    Coated implantable medical device 失效
    涂层可植入医疗器械

    公开(公告)号:US5609629A

    公开(公告)日:1997-03-11

    申请号:US484532

    申请日:1995-06-07

    摘要: A coated implantable medical device 10 includes a structure 12 adapted for introduction into the vascular system, esophagus, trachea, colon, biliary tract, or urinary tract; at least one layer 18 of a bioactive material positioned over the structure 12; and at least one porous layer 20 positioned over the bioactive material layer 18. Preferably, the structure 12 is a coronary stent, and the bioactive material is at least one of heparin, dexamethasone or a dexamethasone derivative. The device 10 includes layers 18 and 22 of heparin and dexamethasone, the layer 22 of dexamethasone being positioned above the layer 18 of heparin. The layers of bioactive material also can be individual materials or a combination of different materials. Unexpectedly, the more soluble heparin markedly promotes the release of the less soluble dexamethasone above it. The porous layer 20 is composed of a polymer applied by vapor or plasma deposition and provides a controlled release of the bioactive material. It is particularly preferred that the polymer is a polyimide, parylene or a parylene derivative, which is deposited without solvents, heat or catalysts, merely by condensation of a monomer vapor.

    摘要翻译: 涂覆的可植入医疗装置10包括适于引入到血管系统,食道,气管,结肠,胆道或尿道中的结构12; 位于结构12上方的生物活性材料的至少一层18; 以及位于生物活性材料层18上方的至少一个多孔层20.优选地,结构12是冠状动脉支架,生物活性材料是肝素,地塞米松或地塞米松衍生物中的至少一种。 装置10包括肝素和地塞米松的层18和22,地塞米松的层22位于肝素层18之上。 生物活性材料的层也可以是单独的材料或不同材料的组合。 意外的是,较易溶解的肝素显着促进了较低溶解度的地塞米松释放。 多孔层20由通过蒸汽或等离子体沉积施加的聚合物组成,并提供生物活性材料的受控释放。 特别优选的是,聚合物是聚酰亚胺,聚对二甲苯或聚对二甲苯衍生物,它们仅通过单体蒸气的冷凝而无溶剂,热或催化剂沉积。