Aortic Arch Filter Membrane for Single-Access Cerebral Protection
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Solution Overview
Problem
Existing endovascular procedures face challenges in effectively isolating the complete cerebral circulation from embolic debris, with current devices often requiring multiple catheters and access through the femoral artery, leading to potential stroke risks due to incomplete protection of cerebral arteries.
Innovation Solution
A single catheter system is introduced through the brachiocephalic or right radial artery, deploying a filter membrane across the aortic arch to isolate all three major cerebral arteries, using a self-expanding frame and anchor mechanism to secure the membrane against the aorta, ensuring comprehensive protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple catheters are used to isolate cerebral arteries, then protection coverage is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple isolation functions into a single catheter device that can protect all three cerebral arteries (right common carotid, left common carotid, and left subclavian) simultaneously. The single catheter incorporates multiple membranes and anchoring mechanisms that work together to isolate all target vessels from one access point, eliminating the need for multiple separate catheters while maintaining comprehensive protection coverage.
2Ease of operation
If femoral artery access is used, then catheter delivery is simplified, but stroke risk increases due to incomplete cerebral protection
Solution Approach 1:
The patent segments the isolation function into three separate membranes positioned at different locations within the aortic arch, each targeting a specific cerebral artery (right common carotid, left common carotid, and left subclavian). This segmentation allows the single catheter to provide comprehensive protection of all three arteries while maintaining a simplified delivery system through femoral access, thereby reducing stroke risk without compromising ease of operation.
3Device complexity
If a single catheter is used, then device complexity is reduced, but protection coverage becomes incomplete
Solution Approach 1:
The patent utilizes the three-dimensional space within the aortic arch by positioning membranes at different angular orientations and distances from the catheter tip. The first membrane targets the right common carotid artery, the second membrane targets the left common carotid artery, and the third membrane targets the left subclavian artery. This spatial arrangement allows a single catheter to comprehensively protect all three cerebral arteries by exploiting the dimensional space available in the aortic arch anatomy.
Data Source
AI summary
Disclosed are methods and devices for isolating all three of the left subclavian, left common carotid and brachiocephalic arteries from embolic debris that might flow through the aortic arch, via a single access point. A system may include an elongate flexible tubular sheath, having a proximal end and a distal end, and an inner member extending through the sheath and moveable relative to the sheath. A left subclavian element may be supported by the inner member. A filter membrane may be configured to isolate the aorta from the brachiocephalic, left common carotid and left subclavian arteries when the left subclavian element is expanded within the left subclavian artery and the sheath is retracted to expose the membrane. The left subclavian element may include a self expandable frame, which may carry a left subclavian filter.