申请人:Cook Incorporated
公开号:US20030036794A1
公开(公告)日:2003-02-20
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, and at least one layer
18
of an immunosuppressive agent posited over at least one surface of the structure
12.
Optionally, the device
10
can include at least one porous, preferably polymeric layer
20
posited over the layer
18
of immunosuppressive agent, and can alternatively or additionally include at least one coating layer
16
posited on one surface of the structure
12,
the at least one layer
18
of immunosuppessive agent being posited in turn on at least a portion of the coating layer
16.
The porous layer
20
and the coating layer
16
each provide for the controlled release of the bioactive material from the device
10.
The structure
12
is preferably configured as a coronary stent. The polymer of the porous layer
20
is preferably applied by vapor or plasma deposition. It is particularly preferred that the polymer is a polyamide, parylene or a parylene derivative which is deposited without solvents, heat or catalysts, but rather by condensation of a monomer vapor.
带涂层的植入式医疗器械
10
包括一个结构
12
适用于导入血管系统、食道、气管、结肠、胆道或泌尿道的结构 12,以及至少一层
18
在结构 12 的至少一个表面上放置免疫抑制剂的至少一层 18。
12.
设备
10
可包括至少一个多孔层,最好是聚合物层
20
放置在层
18
免疫抑制剂层18上的多孔层20,也可以选择性地或另外包括至少一个涂层层
16
在结构的一个表面
12,
至少一层
18
免疫抑制剂层 18 至少有一部分依次位于涂层 16 上。
16.
多孔层
20
和涂层
16
都能控制生物活性材料从装置 10 中释放。
10.
结构
12
最好配置为冠状动脉支架。多孔层的聚合物
20
最好采用气相或等离子沉积法。特别优选的是,聚合物是聚酰胺、对二甲苯或对二甲苯衍生物,其沉积无需溶剂、热量或催化剂,而是通过单体蒸气的冷凝。