发明申请
US20050240213A1 Catheter with a multilayered shaft section having a polyimide layer
有权
具有具有聚酰亚胺层的多层轴部的导管
- 专利标题: Catheter with a multilayered shaft section having a polyimide layer
- 专利标题(中): 具有具有聚酰亚胺层的多层轴部的导管
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申请号: US11038971申请日: 2005-01-18
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公开(公告)号: US20050240213A1公开(公告)日: 2005-10-27
- 发明人: Jeong Lee , Edwin Wang , Roseminda White
- 申请人: Jeong Lee , Edwin Wang , Roseminda White
- 主分类号: A61F2/958
- IPC分类号: A61F2/958 ; A61L29/08 ; A61M25/00 ; A61M29/02 ; A61M29/00
摘要:
A catheter having an multilayered shaft section with a first layer formed of a polyimide first material and a second layer formed of a second material. In a presently preferred embodiment, the polyimide material is a thermoset polyimide. However, in alternative embodiments, a thermoplastic polyimide is used. The thermoset polyimide has a very high glass transition temperature (Tg) of approximately 400° C. (as measured by differential scanning calorimetry), and excellent dimensional stability at the processing temperature of polyamides commonly used in catheter components. As a result, during formation and assembly of the catheter, production of a thin polyimide layer with controlled dimensions is facilitated. The polyimide has a high modulus and provides a thin walled yet highly pushable shaft section, while the second layer provides kink resistance. In one embodiment, the second material is selected from the group consisting of a polyamide material and a polyurethane material.