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    • 7. 发明申请
    • EXTRACTION SCREWDRIVER
    • 提取螺丝刀
    • WO2005099601A2
    • 2005-10-27
    • PCT/US2005/009368
    • 2005-03-22
    • SYNTHES (U.S.A.)SUH, Sean, S.RATHBUN, David, Sawyer
    • SUH, Sean, S.RATHBUN, David, Sawyer
    • A61B17/56
    • A61B17/92A61B17/8047A61B17/861A61B17/8888
    • The present invention provides a simplified bone fastener removal tool which allows the surgeon to remove bone screws or other bone fasteners from bone, and from bone plates incorporating fastener locking elements. The tool includes an inner shaft which axially engages the bone fastener, a drive shaft which allows the fastener to be rotated using the tool, and an internally threaded outer sleeve which, in combination with the drive shaft, allows for a controlled removal of the fastener from the bone plate and bone. In particular, the internal threads of the outer sleeve engage external threads on the drive shaft, such that rotating the drive shaft while maintaining the outer sleeve fixed causes the drive shaft to translate with, respect to the sleeve. Thus, when a fastener is axially engaged with the drive shaft, a controlled removal of the fastener from the bone and bone plate is accomplished simply by rotating the drive shaft with respect to the outer sleeve. No pulling on the fastener is necessary. A method of using the tool is also provided.
    • 本发明提供了一种简化的骨头紧固件去除工具,其允许外科医生从骨头以及从包含紧固件锁定元件的骨板移除骨螺钉或其它骨固定件。 该工具包括轴向接合骨紧固件的内轴,允许使用该工具旋转紧固件的驱动轴以及与该驱动轴组合的内螺纹外套,允许可控制地移除紧固件 从骨板和骨头。 特别地,外套筒的内螺纹接合驱动轴上的外螺纹,使得在保持外套筒固定的同时旋转驱动轴使驱动轴相对于套筒平移。 因此,当紧固件与驱动轴轴向接合时,简单地通过相对于外套筒旋转驱动轴来实现紧固件从骨和骨板的受控移除。 不需要拉紧紧固件。 还提供了使用该工具的方法。