Aneurysm Neck Bridging Structure for Coil Herniation Prevention

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Solution Overview

Problem

Existing minimally-invasive techniques for treating vascular malformations, such as aneurysms, face challenges in preventing coil herniation and effectively occluding the aneurysm neck to ensure proper embolization.

Innovation Solution

The apparatus is designed with specific curvature configurations for its orifice, occlusion, and connecting sections to bridge the aneurysm neck, allowing for entanglement with embolization coils and partial occlusion of the orifice, using shape memory or superelastic alloys to facilitate deployment and secure entanglement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If endovascular embolization coils are used to treat aneurysms, then the treatment is minimally-invasive, but coil herniation may occur where coils protrude from the aneurysm

Engineering Contradiction:

Improveminimally-invasive treatmentVSAvoidcoil herniation prevention

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces a bridging apparatus as an intermediary structure between the parent vessel and the aneurysm sac. This apparatus includes a first leg that bridges the neck of the aneurysm and a second leg that extends into the aneurysm sac, creating a physical barrier that prevents coils from herniating while maintaining the minimally-invasive nature of the procedure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The bridging apparatus is constructed from flexible materials such as shape memory alloys or superelastic alloys that can be delivered in a compressed state through a catheter and then expand to form a stable bridge structure. The flexibility of the apparatus allows it to conform to the vascular anatomy while providing reliable herniation prevention.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If the apparatus uses multiple turns in the docking section to improve coil entanglement, then coil connection is enhanced, but deployment difficulty increases

Engineering Contradiction:

Improvecoil entanglementVSAvoiddeployment ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies different numbers of turns to different sections of the apparatus. The docking section has between 0.5 and 2 turns to provide sufficient coil entanglement, while the orifice section has at least 2 turns to ensure proper neck bridging. This localized differentiation of structural characteristics allows each section to optimize its function without compromising deployment ease.

Inventive Principle:

Principle #3Local quality

3Reliability

If direct surgical intervention with clips is used to treat aneurysms, then coil herniation is prevented, but the treatment is more invasive

Engineering Contradiction:

Improveherniation preventionVSAvoidinvasiveness

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical clip system used in direct surgery with an endovascular bridging apparatus that can be delivered through a catheter. The bridging apparatus achieves similar herniation prevention functionality through a different mechanical approach - using expanded legs that form a barrier - thereby eliminating the need for open surgical intervention while maintaining reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 apparatus effectively prevents coil herniation and ensures complete embolization by securely bridging the aneurysm neck, enhancing the treatment efficacy of vascular malformations.

Implementation Method 1

using shape memory or superelastic alloys to facilitate deployment and secure entanglement

Methodology Applied

Scientific EffectShape memory: Shape Memory Alloy

Implementation Method 2

using shape memory or superelastic alloys to facilitate deployment and secure entanglement

Methodology Applied

Scientific EffectSuperelasticity: Pseudoelasticity

Data Source

PatentUS12582403B2Devices for treating vascular malformations

Publication Date: 2026.03.24 ENDOSTREAM MEDICAL LTD

AI summary

An apparatus is provided for treating a vascular malformation. The apparatus includes an orifice section, an intra-vascular-malformation docking section, and a connecting section. The apparatus is configured such that, when unconstrained the orifice section is shaped so as to define an orifice-section curve that winds at least 2.5 turns around an orifice-section central axis at a changing distance from the orifice-section central axis, the intra-vascular-malformation docking section is shaped so as to define a docking-section curve that winds between 0.5 and 2 turns around a docking-section central axis at a changing or constant distance from the docking-section central axis, and a slope of the connecting-section is greater than a slope of the orifice-section. Other embodiments are also described.