Spiral-Strut Occlusive Devices for Wide-Neck Aneurysm Treatment

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Solution Overview

Problem

Conventional treatments for intracranial aneurysms, such as balloon-assisted or stent-assisted coiling, pose risks of clot formation and hemorrhagic complications, and flow diverters require dual antiplatelet therapy, limiting their use for ruptured aneurysms, while endosaccular devices offer limited efficacy in bifurcation aneurysms.

Innovation Solution

An occlusive device with spiral struts and an anchor structure that expands within the aneurysm sac, spanning the neck and engaging the aneurysm wall, allowing for intra-aneurysmal flow disruption without requiring dual antiplatelet therapy, and is suitable for wide-necked and ruptured aneurysms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional coiling is used for wide-necked aneurysms, then the aneurysm can be treated with simpler procedure, but coil segments may protrude from the aneurysm sac through the neck into the parent vessel causing serious complications

Engineering Contradiction:

Improvesimplicity of procedureVSAvoidrisk of coil migration

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The occlusive device acts as an intermediary structure positioned at the aneurysm neck to prevent direct interaction between coils and the parent vessel. The device includes an anchor structure that engages the aneurysm wall and spiral struts that extend across the neck, creating a barrier that keeps coils contained within the aneurysm sac while maintaining procedural simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If balloon or stent is added to prevent coil migration, then coil security is improved, but the procedure time, cost, and complexity increase

Engineering Contradiction:

Improvecoil securityVSAvoidprocedure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the functions of coil retention and aneurysm occlusion into a single integrated device. The occlusive device combines anchor structures for wall engagement, spiral struts for neck coverage, and occlusive elements for flow disruption, eliminating the need for separate balloon or stent assistance and reducing procedural complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The occlusive device performs multiple functions simultaneously: it secures coils preventing migration, occludes the aneurysm sac to disrupt blood flow, and provides structural support at the aneurysm neck. This multi-functionality replaces the need for multiple separate devices (coils plus balloon/stent) with a single universal device.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If flow diverter is used to redirect blood flow away from aneurysm, then aneurysm thrombosis is promoted, but dual antiplatelet therapy is required increasing hemorrhagic risk

Engineering Contradiction:

Improveaneurysm thrombosisVSAvoidhemorrhagic complications

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Instead of redirecting blood flow away from the aneurysm like flow diverters, the invention inverts the approach by directly disrupting and occluding blood flow within the aneurysm sac itself. The occlusive device creates stasis and thrombosis inside the aneurysm while leaving parent vessel flow unchanged, eliminating the need for antiplatelet therapy and associated hemorrhagic risks.

Inventive Principle:

Principle #13The other way round (Inversion)

4Object-affected harmful factors

If endosaccular mesh device is deployed within aneurysm sac, then DAPT is not required, but efficacy in bifurcation aneurysms is limited

Engineering Contradiction:

Improveneed for DAPTVSAvoidefficacy in bifurcation aneurysms

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The occlusive device incorporates dynamic elements including expandable anchor structures that can adapt to different aneurysm geometries, and flexible spiral struts that can conform to various neck configurations. This dynamic design allows the device to effectively treat bifurcation aneurysms and other complex geometries while maintaining the advantage of not requiring DAPT.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12458361B2Occlusive devices with spiral struts for treating vascular defects

Publication Date: 2025.11.04 COVIDIEN LP

AI summary

Devices for treating vascular defects and associated systems and methods are disclosed herein. In some embodiments, an occlusive device for treating an aneurysm includes an anchor structure extending circumferentially around an opening. A plurality of spiral struts are coupled to the anchor structure and extend over the opening, and a plurality of protrusions extend away from the spiral struts. The spiral struts and the protrusions can both be arranged within a common plane when the occlusive device is in an expanded configuration. When the occlusive device is deployed within the aneurysm and in the expanded configuration, the spiral struts can span the neck of the aneurysm, and the anchor structure can engage the wall of the aneurysm near the neck.