Nested Stent and Mesh for Cerebral Aneurysm Occlusion

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Solution Overview

Problem

Current treatments for cerebral aneurysms often fail to effectively occlude the aneurysm, leading to risks of rupture and hemorrhage, and existing devices may not adequately prevent embolic members from prolapsing into the parent vessel.

Innovation Solution

A device and method that utilize a flexible expandable member, such as a net or mesh, expanded within the aneurysm sack by embolic members, and a resilient expandable member, like a cylindrical stent, to secure the flexible member and prevent slipping, thereby effectively occluding the aneurysm.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible expandable member is used to occlude the aneurysm, then the device can conform to the aneurysm sack, but the device may slip out of the aneurysm sack

Engineering Contradiction:

Improveconformability to aneurysm sackVSAvoiddevice stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent employs a nested structure where a resilient expandable member is placed inside the flexible expandable member. The resilient member acts as an inner core that provides structural support and prevents the outer flexible member from collapsing or slipping out of the aneurysm sack, while the flexible outer member maintains conformability to the aneurysm geometry.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The device combines two different types of expandable members with complementary properties: a flexible expandable member for conformability and a resilient expandable member for structural support. This composite structure integrates the advantages of both material types to achieve both adaptability and reliability.

Inventive Principle:

Principle #40Composite materials

2Reliability

If embolic members are inserted into the flexible expandable member, then the aneurysm can be occluded, but the embolic members may prolapse into the parent vessel

Engineering Contradiction:

Improveocclusion effectivenessVSAvoidembolic member prolapse

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The resilient expandable member is nested within the flexible expandable member to create an internal support structure. This inner resilient member acts as a barrier that prevents embolic members from migrating or prolapsing through the flexible outer member into the parent vessel, while still allowing the flexible member to expand and occlude the aneurysm effectively.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The resilient expandable member serves as an intermediary structure between the embolic members and the flexible expandable member. It provides a stable internal framework that supports the embolic members in place and prevents their prolapse, while the flexible outer member provides the occlusive function.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 proposed solution achieves effective occlusion of cerebral aneurysms by preventing embolic members from prolapsing into the parent vessel and ensuring the stability of the occlusive device within the aneurysm sack, thereby reducing the risk of rupture.

Implementation Method 1

a resilient expandable member (such as a cylindrical stent or ring stent) that is attached to a central portion of the flexible expandable member and expanded within the aneurysm sack in order to keep the flexible expandable member from slipping out of the aneurysm sack

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a flexible expandable member (such as a net or mesh) which is expanded within the aneurysm sack by the insertion of embolic members into that flexible expandable member

Methodology Applied

Scientific EffectMechanical Expansion:

Data Source

PatentUS20250152176A1Devices and Methods for Occluding a Cerebral Aneurysm

Publication Date: 2025.05.15 ANEUCLOSE LLC

AI summary

This invention is a device to occlude a cerebral aneurysm which includes: a longitudinal lumen that is inserted into the parent blood vessel of an aneurysm; a flexible expandable member (such as a net or mesh) which is expanded within the aneurysm sack by the insertion of embolic members into that flexible expandable member; and a resilient expandable member (such as a cylindrical stent or ring stent) that is attached to a central portion of the flexible expandable member and expanded within the aneurysm sack in order to keep the flexible expandable member from slipping out of the aneurysm sack.