Spinal Rod Connector Assembly for Minimally Invasive Revision Fixation
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Solution Overview
Problem
Existing spinal constructs for treating spinal disorders often require invasive procedures and fail to provide adequate stability and support during healing, especially in revision surgeries, leading to prolonged recovery and tissue damage.
Innovation Solution
A spinal construct system comprising a connector with a double-threaded setscrew, nut, and multi-axial screw configuration that allows for minimally invasive attachment and extension of existing spinal rods, enabling revision and reinforcement of spinal constructs without disrupting the existing implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spinal constructs are used for revision surgery, then adequate stability and support are provided, but invasive procedures are required and tissue damage occurs
Solution Approach 1:
The spinal construct is divided into modular components including a connector, setscrew, nut, and multi-axial screw that can be independently positioned and assembled. This segmentation allows minimally invasive delivery while maintaining structural integrity and stability of the spinal fixation system.
Solution Approach 2:
The connector is configured to receive and nest the setscrew, which in turn receives the nut. The multi-axial screw integrates with this nested structure, allowing compact assembly that can be delivered through minimally invasive approaches while providing robust mechanical fixation.
2Reliability
If traditional spinal constructs are used for revision surgery, then stable support is provided, but prolonged recovery time occurs
Solution Approach 1:
The connector and setscrew are pre-configured with receiving features that align with the existing spinal rod, allowing rapid attachment without extensive surgical exposure or complex assembly steps during the revision procedure.
Solution Approach 2:
The multi-axial screw provides adjustable angulation capabilities, allowing the construct to adapt to the dynamic requirements of revision surgery and patient movement, thereby achieving stable fixation that promotes faster healing.
3Strength
If existing spinal rods are reinforced through invasive procedures, then construct stability is improved, but device complexity increases
Solution Approach 1:
The connector merges multiple functions into a single component: it attaches to the existing spinal rod, receives the setscrew for securing, and integrates with the multi-axial screw for positional adjustment. This consolidation simplifies the overall device while maintaining reinforcement strength.
Solution Approach 2:
The connector is designed with universal compatibility features that allow it to interface with various existing spinal rod configurations. The multi-axial screw provides multi-directional adjustment capability, making the reinforcement system adaptable to different surgical requirements without increasing complexity.
Data Source
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AI summary
A spinal construct includes a coupling member including a first mating surface engageable with an existing fastener implant. The existing fastener implant defines a cavity configured for disposal of an existing spinal rod implant. A connector is engageable with the existing fastener implant and has a rod extending therefrom. A locking member is engageable with a second mating surface of the coupling member. Systems, surgical instruments, implants and methods are disclosed.