Iodine-Based Radiopaque Shape Memory Polymers for Medical Devices
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Solution Overview
Problem
Medical devices with metal components pose challenges for imaging due to artifacts that obscure clinical views, necessitating alternative non-metallic radiopaque materials for effective visualization in CT scans and MRI.
Innovation Solution
Development of iodine-based radiopaque shape memory polymers that are amorphous and non-crystalline, allowing for homogeneous distribution of iodine atoms to provide sufficient radiopacity without the use of metals, ensuring compatibility with imaging systems and maintaining mechanical integrity in physiological environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal components are used in medical devices to provide radiopacity, then the device becomes visible in imaging systems, but imaging artifacts are generated that obscure clinical views
Solution Approach 1:
The patent extracts the radiopaque function from metal components and relocates it to iodine-based polymers. By removing metal entirely and replacing it with iodine-containing polymer materials, the harmful imaging artifacts generated by metals are eliminated while preserving the necessary radiopacity for visualization in CT scans and other imaging systems.
Solution Approach 2:
The patent changes the material parameter from metal to iodine-based polymer. This parameter change allows the device to maintain radiopacity (essential for imaging visibility) while avoiding the artifact generation problem inherent in metal. The iodine content in the polymer is optimized to provide sufficient radiopacity without the harmful effects of metal.
2Object-generated harmful factors
If non-metallic radiopaque materials are used to avoid metal artifacts, then imaging quality improves, but the material must maintain sufficient radiopacity without metal components
Solution Approach 1:
The patent employs composite material design by incorporating iodine-containing compounds into polymer matrices. This composite approach allows the material to achieve sufficient radiopacity through the iodine component while the polymer matrix provides the necessary mechanical properties and biocompatibility, effectively balancing radiopacity requirements with the elimination of metal artifacts.
3Object-generated harmful factors
If iodine-based radiopaque polymers are developed to replace metals, then imaging quality improves, but the polymers must maintain mechanical integrity in physiological environments
Solution Approach 1:
The patent modifies the chemical and physical parameters of the polymer to ensure mechanical integrity in physiological environments. By controlling the polymer's glass transition temperature, molecular weight, and crosslinking density, the material maintains both its radiopaque properties and mechanical strength suitable for implantable medical devices in the body.
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 iodine-based radiopaque shape memory polymers enable effective visualization in medical imaging while maintaining mechanical stability and biodurability, reducing the need for invasive procedures and improving clinical evaluation without the drawbacks of metal artifacts.
Implementation Method 1
Medical devices with metal components pose challenges for imaging due to artifacts that obscure clinical views, necessitating alternative non-metallic radiopaque materials for effective visualization in CT scans and MRI
Implementation Method 2
Shape memory materials are defined by their capacity to recover a predetermined shape after significant mechanical deformation. The shape memory effect is typically initiated by a change in temperature and has been observed in metals, ceramics, and polymers
Implementation Method 3
The glass transition temperature, Tg, is typically represented by a transition in modulus-temperature space and can be used as a reference point to normalize temperature for some SMP systems
Data Source
AI summary
Radiopaque polymer compositions and methods for making the compositions are provided. These radiopaque polymer compositions include polymer compositions comprising a crosslinked polymer network, the network comprising a first repeating unit derived from a monofunctional monomer and a second repeating unit derived from a multifunctional non-iodinated monomer wherein neither of the two monomers is fluorinated. Devices formed from radiopaque polymer compositions are also provided.