Aortic Arch Emboli Diversion Device With Convex Struts
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Solution Overview
Problem
Current methods fail to effectively prevent ischemic strokes caused by blood clots in patients with atrial fibrillation and heart failure, as they either block blood flow or do not adequately divert clots from entering cerebral arteries, and are not suitable for all patients due to anticoagulant contraindications or high bleeding risks.
Innovation Solution
A device comprising an extension portion and an anchor portion with parallel convex struts positioned across an artery opening, designed to fit within the aortic arch, diverting emboli away from cerebral arteries while maintaining minimal resistance to blood flow, and a retrieval system for easy deployment and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anticoagulant therapy is used to prevent ischemic strokes, then stroke prevention effectiveness is improved, but bleeding risk increases
Solution Approach 1:
The device extracts and physically removes the harmful element (blood clots) from the circulatory system by diverting them away from cerebral arteries, eliminating the need for anticoagulant therapy and its associated bleeding risks
Solution Approach 2:
The convex struts act as an intermediary structure that intercepts and redirects blood clots before they can enter cerebral arteries, providing mechanical protection without requiring chemical anticoagulants
2Reliability
If a device blocks blood flow to prevent clots from entering cerebral arteries, then stroke prevention is improved, but blood flow resistance increases
Solution Approach 1:
The device applies a localized protective function only at the critical interface where clots could enter cerebral arteries, using convex struts positioned precisely at the artery opening to divert clots while leaving the rest of the blood flow path unobstructed
Solution Approach 2:
Instead of blocking blood flow directly, the device inverts the approach by using the natural blood flow direction to carry clots past the convex struts and away from cerebral arteries, allowing flow to continue uninterrupted
3Adaptability or versatility
If a complex retrieval system is added to enable easy device removal, then device adaptability is improved, but device complexity increases
Solution Approach 1:
The retrieval system uses a nested structure where the retrieval catheter contains the engagement mechanism, and the engagement mechanism contains the attachment elements, allowing compact delivery and simple deployment through sequential expansion of nested components
Data Source
AI summary
Deflection devices, systems, and methods for the prevention of stroke. Devices hereof comprise an extension portion and an anchor portion, both of which are configured to prevent the device from advancing into the artery extending from the aortic arch in which the device may be positioned. Additionally, a retrieval system is provided, the system comprising a sleeve catheter and a retrieval device slidably disposed therein. The distal end of the retrieval device comprises one or more attachment portions configured to engage at least a portion of the anchor portion of a device positioned within an artery extending from the aortic arch.