Resilient Neck-Bridging Aneurysm Net for Irregular Sac Occlusion
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Solution Overview
Problem
Current aneurysm occlusion devices struggle to effectively occlude irregularly-shaped aneurysm sacs, leading to potential recanalization and incomplete blood flow blockade, particularly due to the need for precise placement and multiple deployment sequences.
Innovation Solution
An intrasacular aneurysm occlusion device featuring a resilient wider-than-neck portion and a flexible sac-filling portion, which synergistically work together to bridge and conform to the aneurysm neck and sac, respectively, ensuring complete occlusion and preventing blood flow through a single deployment sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional spherical or coil-based occlusion devices are used, then the device structure is simple, but the device cannot effectively conform to irregularly-shaped aneurysm sacs, leading to incomplete occlusion and recanalization
Solution Approach 1:
The device is divided into two distinct functional portions: a resilient wider-than-neck portion for bridging the aneurysm neck and a flexible sac-filling portion for conforming to the aneurysm sac. This segmentation allows each portion to be optimized for its specific function while working together to achieve complete occlusion of irregularly-shaped aneurysms.
Solution Approach 2:
Different portions of the device have different mechanical properties tailored to their specific functions. The wider-than-neck portion has resilient properties for bridging and stabilization, while the sac-filling portion has flexible properties for conforming to irregular sac shapes. This local differentiation of material properties enables effective occlusion of irregular aneurysms without requiring complex overall device structure.
2Reliability
If precise placement and multiple deployment sequences are required, then complete occlusion can be achieved, but the procedure time and operational complexity increase
Solution Approach 1:
The device combines the neck-bridging function and sac-filling function into a single integrated structure that is deployed in one sequence. The resilient wider-than-neck portion and flexible sac-filling portion work synergistically to achieve complete occlusion simultaneously, eliminating the need for multiple separate deployment sequences and reducing procedural time while maintaining reliability.
Solution Approach 2:
The device is pre-configured with the wider-than-neck portion positioned to bridge the aneurysm neck and the sac-filling portion positioned to fill the aneurysm sac. This preliminary arrangement ensures that upon single-sequence deployment, the device immediately achieves stable neck bridging and complete sac occlusion without requiring additional placement adjustments or multiple deployment steps.
3Productivity
If a single deployment sequence is used, then procedural time is reduced, but traditional devices cannot achieve stable occlusion of irregular aneurysms
Solution Approach 1:
The device incorporates dynamic mechanical properties with the resilient wider-than-neck portion providing elastic recovery for stable neck bridging and the flexible sac-filling portion providing adaptability to irregular sac geometries. These dynamic properties enable the device to achieve reliable occlusion of irregular aneurysms through a single deployment sequence, maintaining both productivity and reliability.
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 device achieves complete occlusion of irregularly-shaped aneurysm sacs with enhanced stability and reduced risk of recanalization, outperforming traditional spherical or coil-based solutions by conforming to irregular shapes and maintaining position within the sac.
Implementation Method 1
a resilient wider-than-neck portion with a first configuration as it is transported to an aneurysm sac and a second configuration after it has been expanded within the aneurysm sac
Implementation Method 2
a flexible sac-filling portion with a first configuration as it is being transported to an aneurysm sac and a second configuration after it has been expanded within the aneurysm sac
Data Source
AI summary
This invention is an intrasacular aneurysm occlusion device with a proximal resilient stent which becomes wider than the aneurysm neck and a distal flexible net which is expanded by being filled with embolic members. The stent and the net work together. The stent occludes the aneurysm neck and prevents the device from slipping out. The net conforms to the walls of even an irregularly-shaped aneurysm sac and keeps the stent pressed against the inside of the aneurysm neck. This has advantages over the prior art, especially for aneurysms with irregularly-shaped sacs.