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    • 7. 发明申请
    • PEDICLE SCREW EXTENSION FOR USE IN PERCUTANEOUS SPINAL FIXATION
    • 椎弓根螺钉在椎间盘固定术中的应用延伸
    • WO2013187928A1
    • 2013-12-19
    • PCT/US2012/068413
    • 2012-12-07
    • SPINE WAVE, INC.McLEAN, Scott
    • McLEAN, Scott
    • A61B17/70
    • A61B17/708A61B17/7032A61B17/7037A61B17/7085
    • A bone screw extension assembly for use in placing a connecting rod percutaneously into tissue of a patient comprises a multi-axial bone screw and a screw extension releasably coupled to yoke of the bone screw. The screw extension includes coaxially disposed outer sleeve and inner sleeves that are movable axially relative to each other. A screw engaging member projects radially from the distal end of the inner sleeve and is configured to releasably engage an extension coupling surface on the inner surface of opposed upstanding arms of the yoke. A securement member including cooperative surfaces is defined adjacent the distal end of the inner and outer sleeves that is operable upon relative axial movement of the inner and outer sleeves to radially secure the sleeves together for minimization of splaying and to thereby maintain the engagement of the screw engaging member and the bone screw.
    • 用于将连杆经皮放置在患者组织中的骨螺钉延伸组件包括多轴骨螺钉和可释放地联接到骨螺钉的轭的螺钉延伸部。 螺杆延伸部包括同轴布置的外套筒和可相对于彼此轴向移动的内套筒。 螺钉接合构件从内套筒的远端径向地突出并且构造成可释放地接合轭的相对的直立臂的内表面上的延伸联接表面。 包括协作表面的固定构件被限定在内套筒和外套筒的远端附近,所述内套筒和外套筒的远端可在内套筒和外套筒的相对轴向移动之间操作以将套筒径向固定在一起以最小化展开并由此维持螺钉 接合构件和骨螺钉。