Intraluminal Occlusion Device with Barbed Anchoring
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Solution Overview
Problem
There is a need for improved intraluminal occlusion devices and methods to effectively block the entry of fluid into bodily passages, such as the left atrial appendage, to prevent stagnant blood and reduce the risk of blood clots and stroke.
Innovation Solution
The development of intraluminal occlusion devices featuring a tubular frame with longitudinal struts and a bioremodellable covering, which can be deployed to block fluid entry by anchoring within the passage using barbs and convex/concave portions, providing a stenting function and minimizing fluid impingement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional occlusion device is used to block fluid entry into the left atrial appendage, then the potential for stroke and clot formation is reduced, but the device may not provide secure anchoring and may allow fluid impingement
Solution Approach 1:
The occlusion device is divided into multiple functional segments: a tubular frame with longitudinal struts, a covering material, barbs for anchoring, and convex/concave portions for positioning. This segmentation allows each component to perform its specific function independently, improving reliability without requiring a completely complex new design.
Solution Approach 2:
The device employs a nested structure where the covering material is attached to the tubular frame, and barbs are integrated into the frame structure. The convex and concave portions are formed as integral features of the struts. This nesting reduces the number of separate components while maintaining functional complexity.
2Device complexity
If a simple occlusion device is used, then the device complexity is reduced, but the anchoring security and ability to block fluid entry effectively is compromised
Solution Approach 1:
The device is designed with pre-formed convex and concave portions on the struts, and barbs are pre-positioned on the frame. These features are prepared in advance during manufacturing, allowing for easier deployment in the body without requiring complex manipulation or assembly steps during the procedure.
Solution Approach 2:
The barbs on the device are designed to self-anchor into the tissue of the left atrial appendage during deployment. The convex and concave portions automatically position themselves against the appendage walls through the deployment process, eliminating the need for additional anchoring actions or adjustments by the operator.
3Reliability
If the device uses barbs and convex/concave portions for anchoring, then anchoring security is improved, but the device complexity increases
Solution Approach 1:
The struts are designed with specific local features: convex portions at certain locations and concave portions at others. The barbs are positioned at specific sites on the frame. This local differentiation of qualities allows the device to achieve secure anchoring through targeted geometric features rather than uniform complexity throughout the entire structure.
Data Source
AI summary
An intraluminal occlusion device includes a frame and an attached covering. The frame includes longitudinal struts having concave and convex portions. The intraluminal occlusion devices can be implanted at an opening to a body vessel, such as a blind passage, to block the entry of fluid into the vessel. Methods of blocking the entry of fluid into bodily passages are also described.