Spiral-Strut Aneurysm Occluder for Wide-Neck Coil Containment

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Solution Overview

Problem

Conventional treatments for intracranial aneurysms, such as coil embolization, balloon-assisted, and stent-assisted coiling, face challenges with wide-necked aneurysms, leading to complications like coil migration, increased procedural risk, and the need for dual antiplatelet therapy, while flow diverters have limited efficacy and risks for ruptured aneurysms.

Innovation Solution

An occlusive device with spiral struts and an anchor structure that expands within the aneurysm, spanning the neck and engaging the aneurysm wall, allowing for self-expansion and containment within the aneurysm sac, reducing the need for dual antiplatelet therapy and minimizing vessel disruption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional coil embolization is used to treat wide-necked aneurysms, then the aneurysm can be filled with coils, but coil segments may protrude from the aneurysm sac through the neck into the parent vessel causing serious complications

Engineering Contradiction:

Improveocclusion effectivenessVSAvoidcoil migration

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device divides the occlusion function into two separate components: a neck-bridging stent that prevents coil migration, and embolic coils that fill the aneurysm sac. This segmentation allows each component to perform its specific function effectively without interfering with the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The neck-bridging stent acts as an intermediary barrier between the parent vessel and the aneurysm sac. It provides a protective interface that prevents coils from migrating into the parent vessel while allowing the embolization procedure to proceed safely.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a neck-bridging stent is permanently positioned to prevent coil migration, then coil migration is prevented, but the recanalization rate increases and dual antiplatelet therapy is required increasing hemorrhagic complications

Engineering Contradiction:

Improvecoil containmentVSAvoidclot formation on stent

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention extracts the permanent stent component from the treatment approach by using a balloon-assisted temporary stent. The balloon is deflated and removed after providing the necessary support during coil deployment, eliminating the need for permanent stent placement and its associated long-term risks.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The balloon-assisted temporary stent provides preemptive support during the coil deployment process, preventing coil migration before it can occur. Once the coils are securely in place, the balloon is deflated and removed, eliminating the source of potential long-term complications.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If balloon-assisted coiling is used to prevent coil migration, then coil migration is prevented, but the procedural time, cost, and complexity increase

Engineering Contradiction:

Improvecoil containmentVSAvoidballoon delivery system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the functions of the neck-bridging stent and the embolic coils into a single integrated delivery system. The balloon-assisted stent and coils are delivered together through a single catheter, simplifying the procedure compared to separate stent and coil deployment.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The balloon-assisted stent is deployed first as a preliminary structure to establish the necessary support and prevent coil migration before the embolic coils are released. This preliminary action ensures safe coil placement while maintaining procedural efficiency through pre-positioning.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If flow diverters are used to redirect blood flow away from the aneurysm, then aneurysm thrombosis is promoted, but dual antiplatelet therapy is required increasing hemorrhagic complications and efficacy is limited in bifurcation aneurysms

Engineering Contradiction:

Improveaneurysm thrombosisVSAvoidclot formation on stent

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

Instead of using a flow diverter that redirects blood flow through a stent structure in the parent vessel, the invention inverts the approach by placing embolic coils directly within the aneurysm sac and using a temporary balloon-assisted stent only for support during deployment. This eliminates the need for long-term stent presence and DAPT while achieving the same thrombosis goal.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20260060690A1Occlusive devices with spiral struts for treating vascular defects

Publication Date: 2026.03.05 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.