Spiral-Strut Aneurysm Occluder for Wide-Neck Coil Containment

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Solution Overview

Problem

Existing treatments for intracranial aneurysms, such as balloon-assisted or stent-assisted coiling, are complex, risky, and not suitable for ruptured aneurysms, while flow diverters require dual antiplatelet therapy, limiting their application.

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, preventing coil prolapse and blood flow without the need for dual antiplatelet therapy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

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

Engineering Contradiction:

Improvecoiling procedure simplicityVSAvoidcoil containment

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The device uses an anchor structure with spiral struts as an intermediary component positioned at the aneurysm neck to prevent coil prolapse into the parent vessel. The anchor structure acts as a mediator between the coils and the vessel wall, providing mechanical support and containment without requiring complex delivery systems or additional devices.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If balloon-assisted or stent-assisted coiling is used for wide-necked aneurysms, then occlusion rates improve, but treatment time, cost, and complexity increase

Engineering Contradiction:

Improveocclusion rateVSAvoidtreatment complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The device merges the functions of coil containment and neck support into a single integrated anchor structure with spiral struts. This combined structure eliminates the need for separate balloon or stent devices, reducing treatment complexity while maintaining high occlusion rates through effective coil containment and endothelialization promotion.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If neck-bridging stents are permanently positioned in the parent vessel, then coil migration is prevented, but chronic clot formation risk increases requiring DAPT

Engineering Contradiction:

Improvecoil migration preventionVSAvoidclot formation risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device extracts the stent function from the parent vessel and relocates it to the aneurysm sac itself. The anchor structure with spiral struts is positioned within the aneurysm rather than in the parent vessel, eliminating the need for DAPT while still preventing coil migration through mechanical containment at the neck.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If flow diverters are positioned in the parent vessel, then aneurysm thrombosis is promoted, but DAPT is required increasing hemorrhagic complication risk

Engineering Contradiction:

Improveaneurysm thrombosis promotionVSAvoidhemorrhagic complication risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The device inverts the conventional approach by placing the flow-disrupting structure within the aneurysm sac rather than in the parent vessel. The spiral struts and protrusions create turbulence and stasis within the aneurysm to promote thrombosis, while the parent vessel remains patent and free of foreign bodies, eliminating the need for DAPT.

Inventive Principle:

Principle #13The other way round (Inversion)

5Object-affected harmful factors

If endosaccular mesh devices are deployed completely within the aneurysm sac, then DAPT is not required, but device profile may be larger

Engineering Contradiction:

ImproveDAPT requirementVSAvoiddevice profile

Core Design Contradiction:

Object-affected harmful factorsVSVolume of moving object

Solution Approach 1:

The device uses a spiral configuration for the struts that allows compact folding during delivery and self-expansion within the aneurysm sac. The curved, spiral design enables the structure to conform to the spherical or irregular shape of aneurysms while maintaining a low delivery profile and achieving effective flow disruption without requiring DAPT.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentEP4389020B1Occlusive devices with spiral struts for treating vascular defects

Publication Date: 2026.02.04 COVIDIEN LP

Figure 1A~1B
Figure 2A
Figure 2B

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.