Puncture Needle Reference Bar for Spinal Pedicle Insertion
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Solution Overview
Problem
Current methods for accurately guiding the insertion position and direction of a puncture instrument, such as a probe, in spinal fusion surgery lack precision, particularly due to operator dependence and the proximity of critical organs near the spine, necessitating a simpler and more accurate solution for forming pilot holes in vertebral pedicles.
Innovation Solution
A puncture instrument with a metallic needle and a reference bar fixed at a predetermined angle (30-60 degrees) to guide the needle to a desired position, eliminating the need for a separate guiding device, using auxiliary bars to confirm the reference bar's orientation and ensuring accurate insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate guiding device is used to control insertion position and direction, then accuracy is improved, but device complexity increases
Solution Approach 1:
The reference bar is integrated directly onto the puncture needle as a single unified instrument. The reference bar extends from the needle shaft at a predetermined angle (30-60 degrees) and includes auxiliary bars that project perpendicular to the reference bar, creating a compact guiding structure that eliminates the need for separate external guiding devices while maintaining accurate insertion positioning
2Device complexity
If operator experience is relied upon for insertion accuracy, then device simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The puncture needle itself provides the guiding function through its integrated reference bar structure. The reference bar with its specific angle and auxiliary bars serves as a self-contained positioning system that guides the needle to the correct insertion position and direction without requiring external guiding devices or heavy reliance on operator skill and judgment
3Device complexity
If no guiding device is used, then device complexity is reduced, but insertion accuracy deteriorates due to operator variation
Solution Approach 1:
The reference bar is integrated directly onto the puncture needle as a single unified instrument. The reference bar extends from the needle shaft at a predetermined angle (30-60 degrees) and includes auxiliary bars that project perpendicular to the reference bar, creating a compact guiding structure that eliminates the need for separate external guiding devices while maintaining accurate insertion positioning
Solution Approach 2:
The reference bar is designed with specific geometric parameters including a predetermined angle of 30-60 degrees relative to the needle shaft and auxiliary bars projecting perpendicular to it. These fixed geometric parameters ensure consistent and repeatable insertion accuracy across different operators and procedures
Data Source
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AI summary
The present invention is to provide a puncture instrument which has a simple configuration and which, when a pilot hole is formed in a vertebral pedicle, can accurately control the insertion position and direction of the puncture instrument into the vertebral pedicle. The puncture instrument is configured by including a puncture needle 2 for forming the pilot hole, and a reference bar 3 that is provided at the puncture needle to have a predetermined angle with respect to the puncture needle 2 and serves as a reference for guiding the puncture needle 2 to a desired position at a desired angle. With the present invention, the puncture needle 2 is guided by the reference bar 3 to a desired position at a desired angle, and hence the puncture needle can be controlled by a simple configuration as compared with the case where a guiding device is separately provided.