Aortic Arch Embolic Filter Frame With Segmented Proximal Form
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Solution Overview
Problem
Existing embolic protection devices fail to effectively prevent unwanted macroscopic particles from entering vascular branches of a main vessel during surgical or interventional procedures, risking cerebral embolism and stroke.
Innovation Solution
An embolic protection device with a frame and filter unit, featuring a spring mechanism and geometric design that ensures secure attachment to the aortic wall, allowing flexible adaptation to anatomical conditions and complete coverage of head vessels, using materials like nitinol and a selectively permeable filter material to prevent particle entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the proximal form is made as a single integrated component, then manufacturing simplicity is improved, but adaptability for different delivery devices is worsened
Solution Approach 1:
The proximal form is divided into a first part and a second part that can be separated from each other. The first part remains attached to the delivery device while the second part is released into the aortic arch. This segmentation allows the same proximal form design to be used with different delivery devices, improving adaptability while maintaining manufacturing simplicity through modular construction.
2Adaptability or versatility
If the proximal form is designed to be released from the delivery device, then adaptability is improved, but device complexity is worsened
Solution Approach 1:
The proximal form is segmented into two parts with a release mechanism that allows the second part to be detached from the first part. The first part remains on the delivery device as an anchor, while the second part is released to form the protective structure in the aortic arch. This segmentation provides adaptability without requiring complex multi-component systems.
3Reliability
If the filter unit is made larger to improve embolism protection, then protection effectiveness is improved, but delivery through the iliac artery is worsened
Solution Approach 1:
The proximal form is divided into parts that can be delivered sequentially through the iliac artery. The first part is delivered and anchored, then the second part is released and expanded to form the full protective structure. This segmentation allows the filter unit to be delivered in a compact, deliverable size while still achieving the larger size needed for effective embolism protection upon deployment.
Solution Approach 2:
The proximal form components are designed to nest within each other during delivery, similar to nested dolls. The second part is contained within or alongside the first part during delivery through the iliac artery, allowing the entire structure to pass through small vessels. Upon release, the nested components expand to form the larger protective structure needed for effective embolism protection.
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
Embolism protection device (1) for delivery into an aortic arch, comprising a filter unit (3), a frame (5) and a delivery unit (7), wherein the filter unit (3) is arranged on the frame (5) and the frame (5) has a proximal region (9) comprising a proximal form (11) which is arranged in an interior region of the frame (5) and is connected to the delivery unit (7), wherein the proximal form (11) comprises a first part (13) and a second part (15), wherein the second part (15) is formed at one end of the first part (13).