Adjustable Bone Screw Fixing Rod Structure for Smaller Incisions
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Solution Overview
Problem
Existing bone screw fixing rods for minimally invasive spine surgery require large incisions due to fixed angles between bone screws, increasing the risk of inflammation and infection and prolonging wound healing time.
Innovation Solution
A bone screw fixing rod and manipulation structure that allows adjustable angles between the fixing rod and screws through a rotating mechanism, comprising a fixing member, moving member, and gripping part, enabling the rod to be placed at a smaller angle during surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed angle structure is used for the bone screw fixing rod, then the structure is simple and easy to manufacture, but the incision size must be large and soft tissue damage increases
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed angle structure into an adjustable angle structure. The manipulating tool includes a rotating component that allows the bone screw fixing rod to be inserted at different angles relative to the incision, enabling the surgeon to optimize the insertion angle for each specific surgical case while using a standardized tool design.
2Device complexity
If a fixed angle structure is used for the bone screw fixing rod, then the device complexity is low, but the adaptability to different surgical positions is reduced
Solution Approach 1:
The patent implements dynamics by introducing a rotating mechanism in the manipulating tool that allows the bone screw fixing rod to be inserted at variable angles. This dynamic adjustment capability enables the same tool to adapt to different surgical positions and patient anatomies without requiring multiple specialized tools, thereby improving versatility while maintaining reasonable device complexity.
Solution Approach 2:
The patent applies parameter changes by allowing the insertion angle parameter to be variable rather than fixed. The rotating component of the manipulating tool enables change in the angular parameter during the surgical procedure, allowing optimization of the bone screw fixing rod insertion angle based on real-time surgical needs and patient-specific anatomical considerations.
3Ease of operation
If larger incisions are made to accommodate the bone screw fixing rod, then the rod can be placed easily, but the risk of inflammation and infection increases and wound healing time is prolonged
Solution Approach 1:
The patent applies dynamics by enabling the bone screw fixing rod to be inserted at adjustable angles through the manipulating tool's rotating mechanism. This allows the surgeon to optimize the insertion angle to minimize the required incision size while maintaining ease of rod placement, thereby reducing the trade-off between operational ease and harmful effects like inflammation and infection risk.
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
Reduces the size of incisions made during minimally invasive surgery, minimizing soft tissue damage and accelerating wound healing.
Implementation Method 1
a side wall of the accommodating space is provided with a second thread engaged with the first thread. The rotating part is connected with the second distal end.
Implementation Method 2
when the rotating part is rotated to rotate the first thread along the second thread, the moving member can be controlled to move along the fixing member
Data Source
AI summary
A bone screw fixing rod and manipulation structure thereof is provided, which includes a bone screw fixing rod, a fixing member, a moving member and a gripping part. The fixing member has a first front end and a first distal end opposite to each other, the first front end is provided with a groove for accommodating and fixing the bone screw fixing rod. The moving member has a second front end and a second distal end opposite to each other, the second front end is provided with a notch for limiting and moving the bone screw fixing rod, and the second distal end is provided with a first thread. The gripping part has an accommodating space and a rotating part, the accommodating space is used for accommodating the first distal end of the fixing member and the second distal end of the moving member, and a side wall of the accommodating space is provided with a second thread engaged with the first thread. Wherein the rotating part is connected with the second distal end.