Embolic Filter Membrane Aperture Shape Change
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Solution Overview
Problem
Current embolic protection filtering devices face challenges in achieving effective adhesion between the filter frame and membrane, which can lead to debris loss during removal and reduced efficacy in capturing embolic debris.
Innovation Solution
The design incorporates a filter frame and membrane with apertures that change shape from a collapsed to an expanded configuration, utilizing self-expanding shape-memory materials and a reduced profile to enhance adhesion and debris capture, while allowing blood flow and minimizing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional filter membrane is used with a filter frame, then the device structure is simple, but the adhesion between the filter frame and membrane is insufficient leading to debris loss during removal
Solution Approach 1:
The filter membrane is segmented into multiple apertures with interlocking features that engage with the filter frame, creating distributed adhesion points throughout the membrane surface rather than relying on a single attachment method
Solution Approach 2:
The filter membrane and filter frame are merged into an integrated assembly where the membrane apertures directly engage with the frame structure, eliminating the need for separate adhesion mechanisms while maintaining strong attachment
2Reliability
If the filter membrane is made larger to capture more debris, then the debris capture efficacy is improved, but the material usage and device profile increase
Solution Approach 1:
The filter membrane utilizes a thin film structure with strategically positioned apertures that provide high debris capture efficacy with minimal material usage, leveraging the film's flexibility to conform to vessel geometry
Solution Approach 2:
The filter membrane employs a porous structure with multiple apertures that maximize surface area for debris capture while minimizing overall material consumption, allowing efficient filtration with reduced material footprint
3Productivity
If the filter apertures are made larger to allow better blood flow, then the fluid flow is improved, but the debris capture capability is reduced
Solution Approach 1:
The filter membrane features apertures with non-uniform size distribution where larger apertures are positioned in regions requiring higher blood flow while smaller apertures are placed in areas prioritizing debris capture, optimizing both functions locally
Solution Approach 2:
The filter membrane incorporates a high density of apertures where the cumulative effect of multiple partial openings achieves both adequate blood flow and effective debris capture, rather than relying on a few large openings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the filter's ability to capture embolic debris effectively and reduces the risk of debris loss during removal, allowing for efficient use in various vessel sizes and deeper anatomy access.
Implementation Method 1
utilizing self-expanding shape-memory materials
Data Source
AI summary
Embolic protection filtering devices and methods for making and using the same. An example embolic protection filter device may include an elongate shaft. A filter may be coupled to the shaft. The filter may include a filter frame and a filter membrane having a plurality of apertures formed therein attached to the filter frame. The filter may be configured to shift between a first collapsed configuration and a second expanded configuration. The apertures may have a first shape when the filter is in the first configuration and a second shape when the filter is in the second configuration.