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21. 发明授权

US5417665A Intravascular cannula 失效
标题翻译：血管内插管
公开(公告)号：US5417665A
公开(公告)日：1995-05-23
申请号：US138801
申请日：1993-10-19
申请人： Carlo R. De La Mata , Luis A. Davila
发明人： Carlo R. De La Mata , Luis A. Davila
IPC分类号： A61M25/06 , A61M5/178
CPC分类号： A61M25/0606
摘要： An intravascular catheter comprises a plastic tube of a diameter capable of occupying a blood vessel. The plastic tube defines a tapered distal tip. The distal tip comprises an annular, distal end portion having an outer diameter that tapers at a first acute angle to the tube longitudinal axis, distally and inwardly to a thin, annular, distal end surface. The tube also defines a second, tapered, annular portion proximal of and next to the annular, distal end portion. The second portion defines an outer diameter that tapers distally and inwardly down to an outer diameter of essentially no less than the maximum outer diameter of the annular, distal end portion. The second portion tapers at a second acute angle to the longitudinal axis, which is less than the first acute angle. Also, an improved composition for the cannula tube is disclosed.
摘要翻译：血管内导管包括能够占据血管的直径的塑料管。塑料管限定锥形远端。远侧末端包括环形的远端部分，其具有以与管纵向轴线成第一锐角逐渐变细的外径，向远侧和向内延伸至薄的，环形的远端表面。管还限定了环形远端部分的近侧和邻近环形远端部分的第二锥形环形部分。第二部分限定外径向远端和向内向下渐缩至基本上不小于环形远端部分的最大外径的外径。第二部分以与第一锐角小于纵轴的第二锐角逐渐变细。此外，公开了用于套管管的改进的组合物。

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