Spinal Stabilization Anchors and Bridges Restraining Segmental Motion
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Solution Overview
Problem
During surgical procedures, patient movement relative to the operating table or anatomical features can compromise the accuracy and precision of surgical tools and navigation systems, particularly in spine surgery where segmental motion of vertebrae can reduce guidance and navigation accuracy.
Innovation Solution
A spinal stabilization system using anchors with varying heights and clamping mechanisms, bridges with different lengths, and tracking markers to secure to anatomical features, preventing movement and enabling precise navigation and tool guidance through mechanical linkage and sensor integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rigid fixation system is used to prevent patient movement, then surgical precision is improved, but patient comfort and blood circulation are worsened
Solution Approach 1:
The system comprises a plurality of modular fixation devices including anchors, clamps, and bridges that can be independently positioned and configured based on surgical requirements, enabling localized stabilization without comprehensive rigid fixation
Solution Approach 2:
The modular design allows dynamic adjustment of fixation points and configurations during the surgical procedure, enabling the system to maintain surgical precision while accommodating physiological movements and improving patient comfort
2Reliability
If multiple anchors of varying heights are used to stabilize different anatomical features, then stabilization effectiveness is improved, but device complexity is worsened
Solution Approach 1:
The bridge comprises a universal coupling mechanism that can interface with multiple anchor types including pedicle screws, hooks, and clamps, as well as connect to surgical tools and navigation systems, thereby reducing overall system complexity through multi-functionality
Solution Approach 2:
Anchors are selected with specific heights and configurations matched to local anatomical features of individual vertebrae, while maintaining standardized connection interfaces and bridge components throughout the system to control overall complexity
3Measurement precision
If real-time tracking markers are integrated into anchors, then navigation accuracy is improved, but manufacturing complexity is worsened
Solution Approach 1:
The tracking markers are provided as separate components that can be coupled to the anchors after anchor manufacturing, eliminating the need for complex integrated manufacturing processes while maintaining real-time navigation capability
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
The system effectively stabilizes the patient, enhancing surgical precision by restraining segmental motion and providing real-time feedback on anatomical movement and strain, thus improving guidance and navigation accuracy.
Implementation Method 1
Each anchor may further comprise a spring that biases the clamp toward the fully closed position
Implementation Method 2
the bridge comprises a photoelastic material
Data Source
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AI summary
A spinal stabilization system includes a plurality of anchors and at least one bridge. Each anchor includes a clamp configured to engage an anatomical element, the clamp movable between a fully open position and a fully closed position; a locking screw configured to selectively prevent the clamp from being moved into the fully open position; and a bridge interface. The at least one bridge is a rigid member having a first end and a second end opposite the first end, each of the first end and the second end having an anchor interface. The bridge interface is configured to receive the anchor interface.