Shape memory polymer (SMP) gripper with a release sensing system
    4.
    发明授权
    Shape memory polymer (SMP) gripper with a release sensing system 失效
    形状记忆聚合物(SMP)夹具与释放感应系统

    公开(公告)号:US6102917A

    公开(公告)日:2000-08-15

    申请号:US116019

    申请日:1998-07-15

    摘要: A system for releasing a target material, such as an embolic coil from an SMP located at the end of a catheter utilizing an optical arrangement for releasing the material. The system includes a laser, laser driver, display panel, photodetector, fiber optics coupler, fiber optics and connectors, a catheter, and an SMP-based gripper, and includes a release sensing and feedback arrangement. The SMP-based gripper is heated via laser light through an optic fiber causing the gripper to release a target material (e.g., embolic coil for therapeutic treatment of aneurysms). Various embodiments are provided for coupling the laser light into the SMP, which includes specific positioning of the coils, removal of the fiber cladding adjacent the coil, a metal coating on the SMP, doping the SMP with a gradient absorbing dye, tapering the fiber optic end, coating the SMP with low refractive index material, and locating an insert between the fiber optic and the coil.

    摘要翻译: 一种用于从位于导管端部的SMP释放目标材料(例如栓塞线圈)的系统,其利用用于释放材料的光学装置。 该系统包括激光,激光驱动器,显示面板,光电检测器,光纤耦合器,光纤和连接器,导管和基于SMP的夹持器,并且包括释放感测和反馈装置。 基于SMP的夹持器通过光纤通过光纤被加热,使得夹具释放靶材料(例如用于治疗动脉瘤的栓塞线圈)。 提供了用于将激光耦合到SMP中的各种实施例,其包括线圈的特定定位,邻近线圈的光纤包层的移除,SMP上的金属涂层,用梯度吸收染料掺杂SMP,使光纤 以低折射率材料涂覆SMP,并将插入物定位在光纤和线圈之间。