Vascular Occlusion Structure for Complex Aneurysm Conformability
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Solution Overview
Problem
Existing vascular occlusion devices face challenges in conforming to complex geometries of target areas, such as aneurysms, leading to difficulties in effective occlusion due to problematic placement and retention of embolic coils.
Innovation Solution
The development of an occlusive device with a retention portion and a holding portion, featuring a clover-shaped retention portion and a cylindrical mesh holding portion, which can be expanded to conform to complex shapes and deliver additional occluding devices, along with a delivery system for embolic agents, enhancing occlusion efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional embolic coils are used for vessel occlusion, then the occlusion process is simple, but the device cannot effectively conform to complex vascular geometries leading to poor retention and occlusion efficacy
Solution Approach 1:
The occlusive device is divided into multiple segments including a retention portion with multiple lobes and a holding portion. This segmentation allows each lobe to independently conform to different aspects of the complex vascular geometry while maintaining overall structural integrity, solving the problem of poor retention with traditional single-structure coils
Solution Approach 2:
The device employs a nested structure where the holding portion containing embolic material is positioned within the retention portion. This nested configuration allows the device to adapt to complex geometries by having the outer retention structure conform to the vascular shape while the inner holding structure provides stable embolic material retention
2Reliability
If the occlusive device is designed to expand and conform to complex shapes, then occlusion efficacy improves, but the delivery and deployment complexity increases
Solution Approach 1:
The occlusive device transitions from a compressed delivery state to an expanded deployed state, dynamically adapting its shape to conform to the target vascular geometry. The retention portion with its multiple lobes expands to match the complex geometry of the aneurysm or vascular structure, ensuring reliable occlusion while the delivery system maintains control during the transition
3Reliability
If the holding portion is designed to receive and retain embolic material, then occlusion reliability improves, but the device requires additional components increasing complexity
Solution Approach 1:
The device merges the retention function and holding function into a single integrated structure. The retention portion with its multiple lobes serves both to anchor the device to the vascular geometry and to contain the holding portion that retains embolic material. This combination eliminates the need for separate retention and holding devices, reducing procedural complexity while maintaining reliable embolic material retention
Data Source
AI summary
An occlusive device, occlusive device delivery system, method of using, and method of delivering an occlusive device, and method of making an occlusive device to treat various intravascular conditions is described.