Surgical Instrument Tulip Design for Spinal Stabilization
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Solution Overview
Problem
Current surgical instruments for spinal stabilization require a variety of different tools and instruments, which can be cumbersome for surgeons to learn and use, especially when performing complex procedures like spondylodesis, as they need to navigate multiple screw systems and instrument combinations.
Innovation Solution
A surgical instrument featuring a tulip with a pressure ring and guide element that allows for easy mounting, changing, and adjustment, enabling monoaxial, polyaxial, or rigid movements of pedicle screws, and a unified extension shaft for versatile use across different surgical techniques, reducing the need for multiple instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different instruments and screw systems are used for spinal stabilization, then the ability to handle various surgical techniques and indications is improved, but the device complexity and difficulty of operation increase significantly
Solution Approach 1:
The patent implements a universal tulip design that can accommodate multiple screw types (pedicle screws, laminar hooks, transforaminal screws) through a single instrument interface. The tulip features a standardized receiving structure with adjustable components that adapt to different screw head configurations, allowing one instrument set to perform multiple surgical functions rather than requiring separate specialized tools for each screw type
Solution Approach 2:
The instrument system is divided into modular components: the tulip (receiving element), extension shaft (connection element), and various screw types. This segmentation allows each component to be optimized independently while maintaining compatibility through standardized interfaces, reducing the overall complexity by allowing mix-and-match configuration rather than requiring complete instrument sets for each technique
2Adaptability or versatility
If multiple different instruments and screw combinations are required, then comprehensive surgical capability is improved, but the learning curve and error sources increase
Solution Approach 1:
The standardized tulip design provides a consistent interface and operation mode across all screw types and surgical techniques. Surgeons learn one set of manipulation skills and instrument handling procedures that apply universally regardless of which specific screw or technique is being used, dramatically reducing the learning curve compared to mastering multiple separate instrument systems
3Ease of operation
If a unified instrument set is used for various surgical techniques, then the ease of operation and learning curve are improved, but the adaptability to specific surgical requirements may be reduced
Solution Approach 1:
The tulip incorporates dynamic, adjustable components that can be configured during surgery to match specific surgical requirements. The ability to adjust the receiving structure's geometry and orientation within the tulip allows the single instrument to adapt its characteristics in real-time, maintaining high adaptability while preserving the benefits of a unified instrument set
Solution Approach 2:
Different regions or aspects of the tulip structure are optimized for different functions: some portions provide rigid stabilization, others provide adjustable geometry, and certain areas offer friction-based or mechanical locking mechanisms. This local differentiation of properties within the single instrument allows it to meet diverse surgical requirements without compromising overall ease of operation
Data Source
AI summary
A surgical instrument includes an implant, which may include a cannulated pedicle screw having a screw head, a tulip connected to the screw head, an extension connected to the tulip, an ini threadedly engaged with at least one of the tulip and the extension, and/or a guide wire disposed in at least one of the extension, the tulip, and the implant.