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interlock drive device

An actuator and locking technology, applied in fixers, fastening devices, internal bone synthesis, etc., can solve the problems that prevent surgeons from observing the target insertion position or target removal position of bone screws

Active Publication Date: 2016-09-28
SYNTHES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These configurations may result in the shaft of the driving instrument having a diameter that is too large for the desired application, which may prevent the surgeon from viewing the bone screw and / or the intended insertion or removal location within the patient.

Method used

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Examples

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Embodiment Construction

[0046] For convenience, the same or equivalent elements in the various embodiments shown in the drawings are marked with the same reference numerals. Certain terms are used in the following description for convenience only and are not limiting. The words "right", "left", "top" and "bottom" designate directions in the drawings, which are by way of reference. The words "inwardly," "inwardly," "outwardly," and "outwardly" refer to directions toward and away from the geometric center of a device and / or designated component thereof. The terminology is intended to include the above words, derivatives of the above words, and words of similar meaning in a non-limiting manner.

[0047] see first Figure 1A-C, The interlocking driving instrument 100 (which may also be referred to as locking screwdriver or interlocking screwdriver) is configured to be releasably lockable to a fastener such as a bone anchor, and in particular a bone screw. For example, when a small bone anchor, such as ...

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PUM

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Abstract

The present invention provides an interlocking driving instrument configured to releasably lock to a fastener, such as a bone anchor. The bone anchor can be locked to the interlocking drive instrument by inserting the expandable distal end of the shaft of the interlocking drive instrument into the drive opening of the bone anchor and causing the expandable distal end to expand by translating the expansion member into the expandable distal end. The distal end expands within the drive opening. Alternatively, the bone anchor can be locked to the interlocking drive instrument by inserting the distal end of the shaft of the interlocking drive instrument into the drive opening of the bone anchor and translating the slide member along an inclined surface, the inclined surface A surface is defined within a channel extending into the shaft.

Description

[0001] Cross references to related patent applications [0002] This patent application claims priority to U.S. Patent Application 13 / 073,294, filed March 28, 2011, and International Patent Application PCT / US2011 / 030170, filed March 28, 2011, which is set forth in its entirety The above is incorporated herein by reference. Background technique [0003] When inserting or removing small bone anchors, particularly small bone screws, from a patient, there is often a risk that the bone screw will become detached from the end of the driving instrument and lost in the patient. Small bone screws can be secured or locked to driving instruments, which typically have a retaining sleeve or other structure mounted on the shaft of the driving instrument. These configurations may result in the shaft of the driving instrument having a diameter that is too large for the desired application, which may prevent the surgeon from viewing the bone screw and / or the target insertion or removal locati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/88
CPCA61B17/8615A61B17/888A61B17/8888B25B23/108B25B15/005A61B17/84A61B17/88
Inventor N.默里F.威尔逊K.亨宁S.波维尔
Owner SYNTHES GMBH