Prosthetic Valve Dual Frames Fabric Retention
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Solution Overview
Problem
Conventional prosthetic valves face challenges in accessing and properly positioning treatment regions within the anatomy, leading to modifications that can negatively impact patient health, particularly during transcatheter procedures where minimizing trauma and avoiding open-heart surgery are crucial.
Innovation Solution
A prosthetic valve design featuring a leaflet frame subcomponent and an anchor frame subcomponent, connected by a sheath with a retention element, allowing transition between delivery and deployed configurations, enabling nested positioning and retrieval, with a flexible anchor frame that can evert and peel away from the tissue annulus for minimally invasive deployment and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open-heart surgical techniques are used to deliver prosthetic valves, then proper positioning and secure implantation are achieved, but patient trauma and recovery time are significantly increased
Solution Approach 1:
The patent employs a flexible fabric structure that can be compressed into a low-profile delivery configuration for transcatheter insertion, then expands to a deployed configuration that secures the valve in position. The fabric acts as both the valve structure and the anchoring mechanism, eliminating the need for open-heart surgery while maintaining reliable positioning through its ability to conform to and anchor within the native valve annulus.
2Object-affected harmful factors
If transcatheter techniques are used to deliver prosthetic valves, then patient trauma is minimized, but challenges in accessing treatment regions and proper positioning arise
Solution Approach 1:
The prosthetic valve is designed with dynamic characteristics, transitioning from a compressed delivery configuration that facilitates easy catheter-based insertion to an expanded deployed configuration that enables secure anchoring. The fabric structure dynamically adapts its shape and size, allowing it to navigate through blood vessels in a compact form and then expand to properly position and anchor the valve at the target site without requiring open-heart surgery.
3Stability of the object's composition
If conventional prosthetic valve designs are used, then structural stability is maintained, but adaptability to different anatomies and retrieval capability are limited
Solution Approach 1:
The patent utilizes parameter changes in the fabric structure's physical state, transitioning between compressed and expanded configurations. The fabric can be compressed to a small diameter for delivery through catheters, then expanded to its functional size for valve operation. This parameter change enables the same structure to adapt to different anatomical configurations and allows for potential retrieval by recompressing and withdrawing the valve if needed.
Data Source
AI summary
A prosthetic valve includes an outer frame defining an outer frame lumen, the outer frame including an inflow flange that flares radially outward, a medial portion having a straight wall frame segment, and an outflow end portion that tapers radially inward. The prosthetic valve can further include a leaflet support structure, one or more leaflets secured to the leaflet support structure, and a retention structure configured to hold the leaflet support structure in a fixed position relative to the outer frame when the leaflet structure is disposed at least partially within the outer frame lumen in a deployed configuration of the prosthetic valve.