Integrated Embolic Filter Catheter for Vessel Protection
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Solution Overview
Problem
Current interventional devices with integrated embolic filters face challenges in simplicity of use, flexibility, and stability, particularly in treating saphenous vein grafts and arterial stenoses, where guidewires may not provide sufficient support or have inadequate landing zones, leading to incomplete protection from embolic particles.
Innovation Solution
A percutaneous transluminal angioplasty device with a catheter integrated filter that features a movable collar and fixed collar with tubular braided scaffolding, allowing the filter to expand and collapse, capturing embolic particles of 40 microns to 100 microns, and conform to vessel shapes, ensuring complete apposition and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distal filter systems are used on guidewires, then embolic particles can be trapped, but flexibility and stability problems occur that make the procedure more difficult
Solution Approach 1:
The patent combines the filter system with the catheter body to create an integrated embolic protection device. The filter is positioned on the catheter rather than on a separate guidewire, merging two previously separate components into one unified device that provides both structural support and embolic filtration capabilities
2Reliability
If guidewires are used for embolic protection, then embolic particles can be filtered, but flexibility and stability are compromised
Solution Approach 1:
The filter system is merged with the catheter structure, utilizing the catheter's inherent stability and support properties. The catheter serves as both the delivery mechanism and the stable platform for the filter, eliminating the instability associated with guidewire-based systems
3Ease of operation
If current filter systems are deployed distal to side branches, then the filter can be positioned, but the side branch remains unprotected from embolic particles
Solution Approach 1:
The patent introduces a radially expandable filter structure that can be positioned at the ostium of side branches. By expanding the filter radially within the side branch opening, the device provides protection in a new spatial dimension, blocking embolic particles from entering the side branch while maintaining access to the main vessel
4Length of moving object
If there is a considerable distance between treatment balloon and distal filter, then the filter can be positioned downstream, but this creates problems in distal vein graft lesions and arterial stenoses with side branches
Solution Approach 1:
The patent employs a dynamically adjustable filter system that can be deployed at variable distances from the treatment balloon based on the specific anatomical requirements. The filter's position and orientation can be adjusted to accommodate different lesion types, including distal vein grafts and arterial stenoses with side branches, providing adaptability through controlled deployment mechanics
Data Source
AI summary
A percutaneous transluminal angioplasty device, comprising an elongated catheter, an interventional device operably coupled to the proximal end of the catheter, a filter operably coupled to the distal end of the catheter, the filter movable between a collapsed and deployed position, and an actuator wire for deploying the collapsing the filter. At least a portion of the actuator wire extends within the catheter. The filter comprises a filter chassis comprising a movable collar a fixed collar and a tubular braided scaffolding coupled between the movable collar and the fixed collar. The filter chassis also comprises a filter membrane coupled to the tubular braided scaffolding.