MECHANISMS FOR IMPROVING THE STIFFNESS TRANSITION ACROSS A DISSIMILAR METAL WELD JOINT

    公开(公告)号:US20180326187A1

    公开(公告)日:2018-11-15

    申请号:US16042515

    申请日:2018-07-23

    IPC分类号: A61M25/09

    摘要: The present disclosure is directed to multi-segment intraluminal guide wires including an elongate distal portion comprising a first metallic material (e.g., nitinol), an elongate proximal portion comprising a second metallic material (e.g., stainless steel). The distal and proximal portions may be directly joined together end to end by a solid-state weld joint. A diameter of the weld region surrounding the weld joint on either side of the weld joint may be reduced (e.g., ground down) relative to the diameter of the distal and proximal portions of the guide wire on either side of the weld region. A stiffness adjusting sleeve may be disposed over the weld joint so that a transition profile of bending stiffness across the weld region is gradual, rather than abrupt across the distal portion of the guide wire to the proximal portion of the guide wire. A polymer jacket may cover the sleeve and distal portion.

    GUIDE WIRE
    6.
    发明申请
    GUIDE WIRE 审中-公开

    公开(公告)号:US20170368316A1

    公开(公告)日:2017-12-28

    申请号:US15433514

    申请日:2017-02-15

    发明人: Satoshi YONEZAWA

    IPC分类号: A61M25/09

    摘要: A guide wire including a core shaft, a coil body that covers an outer periphery of the core shaft, and a distal end joint that joins the core shaft and the coil body, The distal end joint includes tin-zinc based solder. The guide wire has secured joining strength between the core shaft and the coil body no matter the material used for the core shaft and the coil body, and especially when the core shaft and/or the coil body are formed of tungsten.