Aneurysm Occlusion Mesh Structure for Wide-Neck Retention

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Solution Overview

Problem

Existing vascular occlusion technologies face challenges in effectively occluding complex-shaped vascular areas, such as aneurysms, due to difficulties in placement and retention of coils, especially when the aneurysm has a wide neck or complex geometry.

Innovation Solution

The development of an occlusive device with a retention portion that expands to conform to the aneurysm's shape, combined with a holding portion that supports embolic coils and allows for the delivery of additional embolic agents, which can be detached from a catheter to ensure better retention within the aneurysm.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If embolic coils are used for vessel occlusion, then occlusion can be achieved, but successful occlusion is difficult due to complex geometries of target areas

Engineering Contradiction:

Improveocclusion effectivenessVSAvoidconformability to complex shapes

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent employs a flexible mesh structure composed of interconnected struts that can deform and conform to complex vascular geometries including aneurysms with wide necks. The mesh acts as a flexible shell that adapts to the target area's shape while maintaining structural integrity for reliable occlusion

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The occlusive device is divided into multiple components including a retention portion with struts and a mesh structure, allowing each segment to independently adapt to different geometric features of the target area while working together to achieve complete occlusion

Inventive Principle:

Principle #1Segmentation

2Reliability

If traditional occlusive devices are used, then simple occlusion can be achieved, but retention within complex geometries is poor

Engineering Contradiction:

Improveocclusion stabilityVSAvoidplacement difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The device incorporates a retention portion with specific structural characteristics (struts and mesh configuration) designed to engage with local anatomical features of complex vascular geometries, providing enhanced retention at critical locations while maintaining overall device simplicity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The mesh structure serves as an intermediary between the delivery system and the target vascular geometry, facilitating controlled deployment and stable retention within complex anatomical structures

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If a single occlusive device is used, then device complexity is low, but occlusion efficacy in complex geometries is insufficient

Engineering Contradiction:

Improvestructure simplicityVSAvoidocclusion efficacy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The occlusive device integrates multiple functions into a single structure: the retention portion with struts provides anchoring, the mesh structure provides occlusion, and the overall configuration adapts to various vascular geometries, achieving multi-functionality without requiring multiple separate devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3413808B1Devices for vascular occlusion

Publication Date: 2023.07.26 MICROVENTION INC

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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.