Adjustable Spinal Coupling for Axial Rod Positioning
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Solution Overview
Problem
Existing spinal stabilization systems face challenges in optimal placement and adjustment due to geometric and dimensional constraints, limiting their ability to correct targeted spinal deformities and accommodate growth or changes in anatomy.
Innovation Solution
A spinal stabilization system comprising elongated stabilization members and a coupling system that allows adjustable axial positioning, with a locking mechanism to secure and adjust the relative length of the members between anchors, enabling flexible fitting during surgery and subsequent procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elongated one-piece spinal rods are used for stabilization, then spinal segment fixation is achieved, but the surgeon has limited options in sizing and selection and difficulty in maneuvering into position
Solution Approach 1:
The spinal rod system is divided into multiple rod segments that can be connected through coupling systems. This segmentation allows surgeons to select and combine different rod sizes and configurations to match specific patient anatomy and surgical requirements, thereby improving adaptability while maintaining reliable fixation.
Solution Approach 2:
The coupling system enables dynamic adjustment of rod length and configuration during surgery. Surgeons can adjust the rod assembly to achieve optimal fit for the patient's spinal anatomy, transforming a static one-size-fits-all approach into a dynamic, customizable solution that maintains secure fixation.
2Ease of operation
If fixed-length stabilization members are used, then surgical procedure is simplified, but the system cannot accommodate growth or other conditions requiring adjustment
Solution Approach 1:
The coupling system incorporates adjustable length mechanisms that allow the stabilization members to be modified post-operatively. This dynamic capability enables the system to accommodate patient growth or changing medical conditions while maintaining a relatively simple surgical implantation process.
Solution Approach 2:
The system allows for future adjustment without requiring complex revision surgery. The coupling mechanism is designed to be accessible and adjustable, enabling the stabilization system to adapt to changing patient needs through relatively simple subsequent procedures.
3Adaptability or versatility
If adjustable coupling systems are introduced to accommodate growth, then long-term adaptability is improved, but device complexity increases
Solution Approach 1:
The coupling system is divided into discrete, modular components that can be independently adjusted. This segmentation allows for controlled complexity - each component performs a specific function (locking, adjusting, securing) - making the overall system manageable despite its adjustability capabilities.
Solution Approach 2:
The coupling system is designed to perform multiple functions within a single integrated assembly: providing secure fixation, enabling length adjustment, and accommodating future modifications. This multi-functionality reduces the need for multiple separate devices, thereby managing complexity while delivering comprehensive adaptability.
Data Source
AI summary
A spinal stabilization system includes a first stabilization member and a second stabilization member engaged to one another in end-to-end fashion. A coupling system adjustably secures the stabilization members in axial position relative to one another while allowing the relative axial positioning to be adjusted to accommodate growth or other condition or arrangement.