Three-Dimensional Complex Coil for Aneurysm Occlusion
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Solution Overview
Problem
Current methods for treating aneurysms using three-dimensional coils are not advanced enough to provide effective occlusion and scaffolding within the body cavity, leading to inadequate blood flow prevention and thrombus formation.
Innovation Solution
The development of toroid- and cruciform-shaped coils made from biocompatible materials that self-form into complex structures, with the outer portion forming a scaffold and the inner portion providing occlusion, which can be scaled to the treatment site and resistant to rotation or tumbling during deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional three-dimensional coils are used for aneurysm treatment, then the device can be deployed in the body cavity, but the occlusion effectiveness and scaffolding stability are insufficient
Solution Approach 1:
The coil device is divided into distinct functional segments: an outer scaffold portion that provides structural support and stability, and an inner occlusion portion that provides a dense mesh for effective blood flow occlusion and thrombus formation. This segmentation allows each portion to be optimized for its specific function while working together as an integrated system.
Solution Approach 2:
Different portions of the coil device have different structural properties tailored to their specific functions. The outer scaffold has a more open, less dense structure optimized for mechanical stability and scaffolding, while the inner occlusion portion has a denser, more compact structure optimized for blocking blood flow and promoting thrombus formation.
2Reliability
If the coil structure is made more complex to improve occlusion and scaffolding, then treatment effectiveness improves, but manufacturing difficulty increases
Solution Approach 1:
The coil device is pre-formed into its complex three-dimensional configuration using a mandrel or fixture before deployment. This preliminary shaping allows the complex scaffold and occlusion structures to be created with high precision and consistency, avoiding the need to create complexity during the deployment process itself.
Solution Approach 2:
The inner occlusion portion is nested within the outer scaffold portion, with both structures integrated into a single cohesive device. This nested configuration allows the complex multi-functional structure to be manufactured as an integrated unit rather than requiring assembly of multiple separate components.
3Stability of the object's composition
If the coil is designed to self-form into complex shapes, then deployment stability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The coil device incorporates shape memory properties through specific material selection and thermal processing. By controlling parameters such as transformation temperature and material composition, the device can be manufactured in a constrained state and then automatically transform into its final complex three-dimensional configuration at the target site through body temperature or other triggering conditions.
Data Source
AI summary
A complex coil and a fixture for forming same configured such that loops are formed having various configurations relative to each other. The configurations provide improved thrombus formation and reduced rotation or tumbling once implanted. The complex coil is formed of a material that may deformed for purposes of placing the complex coil into a catheter and returns to a complex shape that includes said loops once deployed.