Linked Deflection Stents for Emboli Diversion in Aortic Arch
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Solution Overview
Problem
Current stroke prevention methods are inadequate in addressing the high risk of ischemic strokes, particularly in patients with atrial fibrillation and heart failure, as they often result in severe neurological deficits and poor functional outcomes due to the inability to divert blood clots from entering cerebral arteries effectively.
Innovation Solution
A device comprising multiple stents and deflection components connected by wires, designed to fit within the aortic arch, which diverts emboli away from the arteries supplying the brain by positioning the deflection components at the ostium of the arteries, thereby preventing clot entry and minimizing resistance to blood flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deflection components are positioned at the ostium of arteries to divert emboli, then stroke prevention effectiveness is improved, but device complexity increases due to multiple stents and connecting wires
Solution Approach 1:
The device is divided into multiple stents (first stent, second stent) with individual extension portions, allowing each component to be independently positioned and function. The deflection components are also segmented and can be positioned at different arterial ostia, enabling targeted protection against emboli while maintaining manageable device complexity through modular design
Solution Approach 2:
Connecting wires serve as intermediaries that link the multiple stents and deflection components together, forming a cohesive device structure. These wires enable the coordinated function of separate components while allowing flexibility in positioning and deployment, resolving the contradiction between device complexity and effectiveness
2Reliability
If multiple stents and deflection components are used to divert emboli, then clot entry prevention is improved, but resistance to blood flow may increase
Solution Approach 1:
The deflection components are positioned specifically at the ostium of arteries where emboli would enter, providing localized protection rather than blocking the entire arterial pathway. The extension portions of stents are configured to fit within specific arterial segments, ensuring that blood flow is maintained in unaffected areas while preventing clot entry only where necessary
Solution Approach 2:
The device provides partial action by selectively diverting emboli at specific arterial ostia rather than blocking all blood flow paths. The extension portions of stents are designed to fit within arterial segments without completely occluding the vessel lumen, allowing sufficient blood flow while providing adequate emboli deflection
Data Source
AI summary
Devices, systems, and methods for the prevention of stroke. Devices and systems hereof comprise stents configured to fit within at least part of an artery extending from an aortic arch, and at least one component comprising struts for diverting emboli from entering an artery when the component is positioned at or near its ostium. The stents and the deflection component(s) are coupled in a linked configuration. Additionally, a retrieval system and methods of using the same are provided, the retrieval system comprising a sleeve catheter and a retrieval device slidably disposed therein. The distal end of the retrieval device comprises an attachment portion configured to engage a device positioned within an artery extending from the aortic arch.