Fiber-Based Release Structures for Occlusive Implant Positioning
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Solution Overview
Problem
Existing occlusive implants face challenges with complex, unreliable, and difficult-to-manufacture release mechanisms during delivery, leading to issues with advancement through catheters and control over implant positioning and timing of release.
Innovation Solution
The use of fiber-based release structures, either active or passive, integrated with the braid covering of the implant, provides control and reduces surface friction, allowing for multiple advancements and retraction, and includes mechanisms like fiber loops and interlocking components for precise release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional release mechanisms are used, then the implant can be delivered to the target site, but the release mechanism becomes complex, unreliable, and difficult to manufacture
Solution Approach 1:
The patent extracts the release function from complex mechanical mechanisms and implements it through simple fiber-based structures. The fiber loops and braided configurations provide release functionality through their inherent material properties and geometric arrangements, eliminating the need for complex mechanical components while improving reliability and ease of manufacture.
Solution Approach 2:
The patent utilizes changes in fiber configuration and material properties to achieve release. By adjusting fiber orientation, braiding patterns, and loop formations, the release mechanism transitions from a constrained state during delivery to a released state at the target site, providing reliable control without mechanical complexity.
2Ease of manufacture
If traditional release mechanisms are used, then the implant can be delivered, but manufacturing becomes difficult
Solution Approach 1:
The patent merges the release structure with the implant body itself, using the same fiber materials and braiding techniques for both components. This integration eliminates separate manufacturing processes and assembly steps, significantly simplifying production while maintaining release functionality through the unified fiber-based design.
Solution Approach 2:
The fiber-based release structures are designed to be self-forming and self-releasing through their material properties and geometric configurations. The fibers naturally arrange themselves into loops and braided patterns that provide release functionality without requiring complex manufacturing processes or additional components.
3Ease of operation
If the implant is advanced through the catheter, then delivery to target site is achieved, but friction resistance increases
Solution Approach 1:
The patent employs flexible fiber-based coverings and braided structures that reduce friction during catheter advancement. The fiber loops and braided configurations create a lubricious surface that allows smooth passage through the catheter while maintaining structural integrity and release functionality at the target site.
Data Source
AI summary
Occlusive implants are provided with various embodiments of active and/or passive release structures. Systems for delivering the occlusive implants as well as methods for making and delivering the implants are also provided.