Radiolucent Stabilizing Rod with Radiopaque Marker for Spinal Imaging
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Solution Overview
Problem
Conventional spinal stabilizing systems made of metal obstruct X-ray images, hindering proper placement and diagnosis due to their radiopacity, which limits the visibility of adjacent bone structures and internal structures during and after implantation.
Innovation Solution
Development of radiolucent stabilizing rods and screw systems using biocompatible radiolucent materials with radiopaque markers for improved visibility during imaging, allowing for clearer X-ray images by minimizing metal obstruction while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal bone screws and stabilizing rods are used, then structural strength is improved, but X-ray visibility of adjacent bone structures deteriorates
Solution Approach 1:
The stabilizing rod is segmented into multiple sections: radiolucent portions (allowing X-ray transmission) and radiopaque portions (providing visibility markers). This segmentation enables different regions of the same component to serve different functions - structural support where radiolucency is needed and positioning/visibility where radiopacity is beneficial.
Solution Approach 2:
Different portions of the stabilizing rod have different material properties. The rod incorporates radiolucent material in areas where bone structure visualization is critical, while including radiopaque markers in specific locations for positioning reference. This local differentiation of material properties resolves the contradiction between overall visibility and localized structural requirements.
2Reliability
If metal stabilizing rods are used, then mechanical integrity is improved, but diagnostic accuracy after implantation deteriorates
Solution Approach 1:
The stabilizing rod uses composite construction combining radiolucent biocompatible material with embedded radiopaque markers. This composite approach maintains the mechanical integrity needed for spinal stabilization while enabling post-implantation diagnostic imaging by allowing X-rays to pass through the rod body while highlighting key positions through the radiopaque markers.
Solution Approach 2:
Radiopaque markers serve as intermediaries between the radiolucent stabilizing rod and the X-ray imaging system. These markers provide visible reference points that mediate the interaction between the implant and diagnostic equipment, enabling accurate positioning verification without requiring the entire rod to be radiopaque.
3Difficulty of detecting and measuring
If radiopaque materials are used for stabilizing rods, then visibility during implantation is improved, but visibility of surrounding bone structures deteriorates
Solution Approach 1:
The stabilizing rod is segmented into radiolucent portions for X-ray transmission and radiopaque portions for visibility. This segmentation allows the rod to provide visibility markers during implantation while maintaining transparency in areas where bone structure visualization is needed, resolving the contradiction between component visibility and anatomical visibility.
Solution Approach 2:
Radiopaque material is applied locally at specific positions on the stabilizing rod rather than throughout the entire structure. This localized radiopacity provides necessary visibility cues during implantation while leaving the majority of the rod radiolucent, allowing simultaneous visualization of both the implant markers and surrounding bone structures.
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
Enhances the ability to visualize the placement and orientation of spinal stabilizing components during and after implantation, facilitating better surgical outcomes and diagnostic accuracy by reducing metal-induced X-ray obstruction.
Implementation Method 1
the radiopaque marker blocks the X-rays and prevent them from passing through the body
Implementation Method 2
the radiolucent material with the radiopaque marker disposed thereon, wherein the radiolucent material allows for transmission of X-rays
Data Source
AI summary
A stabilizing rod includes an elongate shaft extending between a proximal end and an opposing distal end. The shaft is comprised of a radiolucent material and bounds a passageway that at least partially extends between the proximal end and the distal end. A core is disposed within the passageway of the shaft. The core can be comprised of a radiopaque material. The stabilizing rod can also include a radiopaque marker disposed on or within the shaft.