Nested Mesh Aneurysm Occlusion Device for Irregular Sac Conformity

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Solution Overview

Problem

Current treatments for cerebral aneurysms often fail to effectively prevent rupture and hemorrhage, leading to significant morbidity and mortality, as existing occlusion devices lack the necessary flexibility and adaptability to conform to irregularly shaped aneurysm sacs.

Innovation Solution

An intrasaccular aneurysm occlusion device with nested proximal and distal meshes, where the proximal mesh covers the aneurysm neck and the distal mesh is expanded to fill the sac using embolic members or material, allowing for flexibility to conform to irregular shapes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing occlusion devices are used to treat cerebral aneurysms, then the treatment procedure can be performed, but the devices fail to effectively prevent rupture and hemorrhage due to lack of flexibility and adaptability

Engineering Contradiction:

Improveeffectiveness in preventing rupture and hemorrhageVSAvoidflexibility to conform to irregularly shaped aneurysm sacs

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The occlusion device is divided into multiple segments including a proximal mesh portion and a distal mesh portion that can be independently deployed and adjusted. This segmentation allows each portion to adapt to different geometries of the aneurysm sac while maintaining overall structural integrity and occlusion effectiveness

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device incorporates dynamic elements such as flexible struts and adjustable mesh structures that can change configuration after deployment. This enables the device to conform to irregular aneurysm shapes and provides ability to adjust to patient-specific anatomical variations, thereby improving both adaptability and reliability

Inventive Principle:

Principle #15Dynamics

2Stability of the object's composition

If a rigid occlusion device is used to provide structural stability, then the device maintains its shape, but it cannot conform to irregularly shaped aneurysm sacs

Engineering Contradiction:

Improvestructural stability of the occlusion deviceVSAvoidconformity to irregular aneurysm sac shape

Core Design Contradiction:

Stability of the object's compositionVSShape

Solution Approach 1:

The device features local quality variations with rigid components in areas requiring structural support and flexible components in areas requiring conformability. The proximal portion maintains structural stability while the distal portion adopts flexible mesh structures that can conform to irregular aneurysm sac geometries

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The device employs a nested structure where flexible mesh portions are contained within or alongside rigid framework elements. This nesting allows the rigid structure to provide overall stability while the nested flexible portions can adapt to irregular shapes, resolving the contradiction between structural stability and shape conformity

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS11944316B2Janjua aneurysm net and other intrasacular aneurysm occlusion devices

Publication Date: 2024.04.02 ANEUCLOSE LLC

AI summary

Disclosed herein are intrasacular aneurysm occlusion devices with nested proximal and distal meshes. A proximal mesh covers the aneurysm neck. A flexible distal mesh expands to fill even an irregularly-shaped aneurysm sac when it is expanded by the insertion of embolic members and/or material.