Bone Preparation Instrument With Separable Guide Wire
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Solution Overview
Problem
Current instruments for preparing bones for bone screw anchoring are complex and time-consuming, requiring multiple instruments and not allowing for the guide wire to be completely separated and used as a guide element after the screw is anchored.
Innovation Solution
A preparation instrument with a guide wire movement mechanism that allows the guide wire to be connected to and moved relative to the instrument, enabling it to be driven into the bone and subsequently separated for use as a guide for the bone screw, combined with a longitudinal channel for control and a distal/proximal instrument part system for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple instruments are used to prepare the bone, then the bone preparation can be performed with different functions, but the procedure becomes complex and time-consuming
Solution Approach 1:
The patent combines multiple bone preparation functions (drilling, reaming, tapping) into a single integrated preparation instrument that can perform all these operations sequentially using one instrument shaft with interchangeable or integrated tool elements, thereby reducing procedure complexity while maintaining functional versatility
Solution Approach 2:
The preparation instrument is designed as a universal tool that can perform multiple bone preparation functions through a single instrument, with the ability to drill holes, ream bones, and cut threads using the same instrument shaft with different tool elements, eliminating the need for multiple separate instruments
2Device complexity
If a stylet is permanently attached to the carrier, then the instrument structure is simplified, but the guide wire cannot be completely separated and used as a guide element after screw anchoring
Solution Approach 1:
The patent segments the guide wire system into a completely separable guide wire and instrument shaft, allowing the guide wire to be removed independently after bone preparation and screw anchoring, enabling it to be reused as a guide element for subsequent procedures while maintaining a relatively simple instrument structure
Solution Approach 2:
The guide wire's relationship with the instrument shaft changes dynamically during the procedure - it is inserted through the shaft during preparation, then completely removed after anchoring to serve as an independent guide element, providing adaptability throughout the surgical process
3Reliability
If the guide wire is driven into the bone using a separate percussion instrument, then the guide wire can be anchored, but the procedure requires additional instruments and time
Solution Approach 1:
The patent combines the guide wire anchoring function with the preparation instrument itself, allowing the instrument shaft to drive the guide wire directly into the bone during the preparation process, eliminating the need for separate percussion instruments and improving overall procedure efficiency while ensuring reliable guide wire anchoring
4Ease of operation
If the bone screw is pre-coupled to the distal end of the instrument, then the screw placement is facilitated, but the guide wire cannot be completely separated from the instrument shaft
Solution Approach 1:
The patent segments the screw delivery system into a separate bone screw and preparation instrument, allowing the bone screw to be independently inserted over the guide wire after the guide wire has been anchored, while maintaining the ability to completely separate the guide wire from the instrument shaft for reuse
Data Source
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AI summary
The invention relates to a preparation instrument for preparing a bone prior to anchoring a bone screw, in particular a pedicle screw, in the bone, wherein the preparation instrument comprises an instrument shaft defining an instrument longitudinal axis, a distal end and a guide wire, in particular in the form of a K-wire, which is separate from the instrument shaft and completely separable, and wherein the preparation instrument is designed for anchoring the guide wire in the bone, wherein the guide wire is designed to be coupled to the preparation instrument, in particular for guiding the preparation instrument during the preparation of the bone, and wherein the preparation instrument comprises a guide wire movement mechanism for moving the guide wire relative to the distal end in a distal and/or proximal direction.