Torus-Shaped Intrasaccular Aneurysm Occlusion Device
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Solution Overview
Problem
Current aneurysm occlusion devices face challenges in effectively treating cerebral aneurysms, particularly in providing stable and secure occlusion of the aneurysm neck while allowing for the delivery of embolic members or material into the aneurysm sac.
Innovation Solution
The development of a torus or torus-section shaped intrasaccular aneurysm occlusion device, which features a central funnel or hyperboloid shaped opening for guiding catheter insertion and providing greater radial-resistance to prevent slipping out of the aneurysm sac.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional aneurysm occlusion device is used, then the device can be inserted into the aneurysm sac, but the device may slip out of the aneurysm sac due to insufficient radial resistance
Solution Approach 1:
The patent applies a torus (doughnut-shaped) geometry to the occlusion device, which provides curved surfaces that conform to the spherical aneurysm sac. This curvature enables the device to engage the sac walls more effectively, increasing radial resistance and preventing slippage while maintaining securement within the confined space of the aneurysm.
Solution Approach 2:
The patent changes the geometric parameters of the occlusion device by using a torus shape with specific dimensional ratios (outer diameter, inner diameter, height) that optimize both radial resistance and fit within the aneurysm sac. This parameter optimization resolves the contradiction between needing high radial resistance and maintaining device stability within the sac.
2Reliability
If the aneurysm neck is occluded to prevent rupture, then the risk of rupture is reduced, but the delivery of embolic members or material into the aneurysm sac becomes difficult
Solution Approach 1:
The torus-shaped device segments the aneurysm treatment function into two parts: the torus body provides occlusion of the aneurysm neck, while the central opening provides a dedicated pathway for embolic material delivery. This segmentation allows both functions to occur simultaneously without interfering with each other.
Solution Approach 2:
The central opening of the torus device acts as an intermediary pathway that facilitates the delivery of embolic members or material into the aneurysm sac. This opening serves as a mediator between the delivery catheter and the aneurysm cavity, enabling embolic delivery while the torus body simultaneously occludes the neck to prevent rupture.
3Stability of the object's composition
If a torus-shaped occlusion device is used to provide radial resistance and securement, then the device stability is improved, but the device complexity increases
Solution Approach 1:
The torus-shaped occlusion device can be constructed from flexible materials such as shape memory alloys or elastic polymers that can be crimped into a compressed configuration for delivery and then self-expand to the torus shape upon deployment. This approach simplifies fabrication by using material properties rather than complex mechanical assembly, reducing device complexity while maintaining stability.
Data Source
AI summary
This invention is a torus (or torus-section) shaped intrasaccular aneurysm occlusion device. A torus (or torus section) shape can be modeled by revolving a convex shape around an axis of revolution which is coplanar with the convex shape. The convex shape which is revolved can be a circle, an ellipse, or half of a yin-yang symbol. The device can further comprise one or more embolic members or embolic material which is inserted into the aneurysm sac through a central opening in the neck bridge.