Braided Occlusive Structure for Conforming Vascular Malformations
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Solution Overview
Problem
Existing occlusive devices struggle to effectively conform to the shape of vascular malformations, leading to incomplete occlusion and potential blood flow into the malformation, necessitating a device that can fully fill the space and promote clotting.
Innovation Solution
The occlusive device features a distal portion that conforms to the interior surface of vascular malformations and a proximal portion that fills the remaining volume, utilizing braided structures with varying shapes, materials, and connections to coils, along with a delivery system involving sheaths and pushers for precise deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rigid occlusive device is used, then the device structure is simple and easy to manufacture, but the device cannot conform to the irregular shape of vascular malformations, leading to incomplete occlusion
Solution Approach 1:
The occlusive device is divided into multiple segments or struts that can independently flex and adapt to the irregular geometry of the vascular malformation. This segmentation allows the device to maintain structural simplicity while achieving conformability to complex malformation shapes.
Solution Approach 2:
The device incorporates flexible materials and thin-walled structures that enable the occlusive element to bend and conform to the irregular interior surface of the vascular malformation. This flexibility allows complete space filling while maintaining ease of manufacture through standard flexible material processing.
2Adaptability or versatility
If a flexible occlusive device is used, then the device can conform to the malformation shape, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The device design uses universal flexible components that can adapt to various malformation shapes without requiring custom-designed complex structures for each case. This multi-functionality approach maintains relative simplicity while achieving high adaptability across different vascular malformation geometries.
Solution Approach 2:
The occlusive device incorporates dynamic elements that allow it to change its configuration during deployment, transitioning from a compact delivery state to an expanded conforming state. This dynamic behavior enables shape adaptation without requiring permanently complex structures.
3Device complexity
If the occlusive device does not completely fill the space, then the device structure is simpler, but blood flow into the malformation is not fully prevented, reducing occlusion effectiveness
Solution Approach 1:
The device employs a nested configuration where multiple occlusive elements are arranged concentrically or in layers, allowing compact delivery while ensuring complete space filling upon deployment. This nesting approach maintains structural simplicity during delivery while achieving thorough occlusion effectiveness.
Solution Approach 2:
The occlusive device utilizes dimensional transformation during deployment, transitioning from a low-profile delivery configuration to a three-dimensional space-filling configuration that completely occupies the malformation cavity, ensuring no gaps remain for blood flow while maintaining manageable structural complexity.
Data Source
AI summary
An occlusive device comprising a braided component which can be inserted into a blood vessel and a delivery system for delivering said occlusive device is described.