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2. 发明授权

US06240231B1 Variable stiffness fiber optic shaft 有权
标题翻译：可变刚度光纤轴
公开(公告)号：US06240231B1
公开(公告)日：2001-05-29
申请号：US09219572
申请日：1998-12-22
申请人： David A. Ferrera , Nicholas C. Debeer , Thuzar Han , Daniel R. Kurz , Rose Y. Wong
发明人： David A. Ferrera , Nicholas C. Debeer , Thuzar Han , Daniel R. Kurz , Rose Y. Wong
IPC分类号： G02B604
CPC分类号： G02B6/403 , A61B18/24 , G02B6/04 , G02B6/241 , G02B6/3887 , G02B23/26
摘要： The variable stiffness optical fiber shaft includes a optical fiber, and at least one coaxial layer of heat shrink polymer disposed over the optical fiber of a length shorter than the optical fiber, to provide variations in stiffness along the length of the shaft. The variable stiffness optical fiber shaft preferably includes a plurality of coaxial layers of heat shrink polymer encapsulating the optical fiber, extending from the proximal end of the optical fiber toward the distal end, the plurality of coaxial layers having different lengths to provide said optical fiber shaft with varying stiffness over the length of the optical fiber shaft. The plurality of coaxial layers can be arranged in successive progressively shorter coaxial layers, and can be formed of heat shrink polymeric material, such as polyethylene, PTFE, PEEK, PET or PPS. The variable stiffness optical fiber shaft can also include a coaxial strain relief member disposed over the outer coaxial polymer layers at the proximal end, and a connecting hub disposed over the strain relief member. The variable stiffness optical fiber shaft can also include a hypo tube attached to the optical fiber, and a reinforcing braid attached over the optical fiber, as well as a radiopaque marker that can be a reinforcing coil. A shape memory collar can also be attached over the distal end of the optical fiber, with a distal sheath extending over a portion of the shape memory collar. A hub can also be attached over the proximal portion of the optical fiber. A method of constructing the variable stiffness optical fiber shaft is also provided.
摘要翻译：可变刚度光纤轴包括光纤，以及设置在比光纤短的长度的光纤上的至少一个热收缩聚合物的同轴层，以提供沿轴的长度的刚度变化。可变刚度光纤轴优选地包括多个同轴层，其包封光纤的热收缩聚合物，从光纤的近端延伸到远端，多个同轴层具有不同的长度以提供所述光纤轴在光纤轴的长度上具有变化的刚度。多个同轴层可以以相继逐渐缩短的同轴层布置，并且可以由热收缩聚合材料如聚乙烯，PTFE，PEEK，PET或PPS形成。可变刚度光纤轴还可以包括设置在近端的外同轴聚合物层上的同轴应变消除构件和设置在应变消除构件上的连接毂。可变刚度光纤轴还可以包括附接到光纤的低管，以及附着在光纤上的加强编织物，以及可以是加强线圈的不透射线的标记。形状记忆轴环还可以附接在光纤的远端上，远端鞘在形状记忆颈圈的一部分上延伸。轮毂也可以附着在光纤的近端部分上。还提供了构造可变刚度光纤轴的方法。

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