Wire Tensioner Tip for Orthopedic Fixation Bolt
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Solution Overview
Problem
Current wire tensioning methods for external orthopedic fixation devices require multiple steps and tools, making it difficult for a single person to properly tension wires across an external fixation frame, and can result in slippage if wires are not oriented orthogonally, posing risks to surgeons and patients.
Innovation Solution
A wire tensioning tip system that engages directly with a wire fixation bolt, allowing for tensioning and securing of wires using only two tools, a wire tensioner and a wrench, with a ratchet and clasping mechanism to incrementally tighten the wire, and a design that accommodates non-orthogonal orientations by engaging with wire fixation bolts rather than the external fixator frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional wire tensioning methods are used with fixation rings, then wire tensioning can be achieved, but multiple tools and persons are required, increasing procedure complexity and time
Solution Approach 1:
The patent introduces a wire fixation bolt as an intermediary component between the wire and the external fixator frame. This bolt serves as a mediator that simplifies the tensioning process by providing a dedicated engagement point for the tensioning tool, eliminating the need for multiple tools and persons while maintaining effective wire tensioning capability
Solution Approach 2:
The invention separates the wire fixation function from the frame structure by introducing a distinct wire fixation bolt component. This segmentation allows the tensioning operation to be performed on the bolt independently, simplifying the overall process and reducing the number of tools needed compared to the integrated fixation ring approach
2Reliability
If traditional tensioning against fixation ring is used, then wire can be tensioned, but slippage occurs when wires are not orthogonally oriented, creating safety risks
Solution Approach 1:
The wire fixation bolt acts as an intermediary that provides a controlled engagement interface for wire tensioning. By concentrating the tensioning force through the bolt's structured geometry rather than against the fixation ring surface, the system eliminates slippage risks associated with non-orthogonal wire orientations while maintaining reliable tensioning capability
Solution Approach 2:
The invention applies local quality by designing the wire fixation bolt with specific geometric features at the engagement point that are optimized for tensioning. The bolt's head geometry and wire engagement surface are locally configured to provide friction-resistant, slip-free tensioning regardless of wire orientation, addressing the harmful slippage effect without compromising overall system function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and safe tensioning of wires by a single medical professional, minimizing the risk of slippage and injury, while allowing for non-orthogonal wire orientations and reducing the number of tools required.
Implementation Method 1
a ratchet and clasping mechanism to incrementally tighten the wire
Implementation Method 2
a ratchet and clasping mechanism to incrementally tighten the wire
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
A wire tensioner tip for use with a wire fixation bolt. First and second wires may be anchored to and tensioned across an external fixator frame with first and second wire tensioners. The first and second wires may be anchored at first anchor locations with first and second wire fixation bolts. First and second wire tensioner tips may engage with third and fourth wire fixation bolts, thereby preventing the third and fourth wire fixation bolts from rotating. The first and second wires may be tensioned to a desired tension with the first and second wire tensioners at the same time to prevent over-tensioning or under-tensioning. The first and second wires may be anchored at second anchor locations with third and fourth wire fixation bolts. By engaging the wire fixator bolts with the wire tensioning tips, fewer tools are required and one medical professional can tension two wires at once.