Dual-Valve Mitral Prosthesis Segmentation for Annulus Fit
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Solution Overview
Problem
Current minimally-invasive transcatheter mitral valve replacement procedures face challenges due to the mismatch between the circular shape of existing prostheses and the D-shaped mitral valve annulus, leading to poor fit and increased risk of left ventricular outflow obstruction.
Innovation Solution
A dual-valve prosthesis with two artificial valves connected by a lumen and sealing members, which can be expanded using balloons or shape-memory materials to fit the annulus, providing a better seal and reducing the risk of obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single circular artificial valve is used, then the device structure is simple, but the fit with the D-shaped mitral valve annulus is poor
Solution Approach 1:
The single circular valve is divided into two separate semi-circular valves that can be deployed independently. Each valve is positioned in one of the two mitral valve orifices, allowing the combined structure to conform to the D-shaped annulus geometry while maintaining structural simplicity through modular design
Solution Approach 2:
The invention uses two semi-circular valves with asymmetric shapes that match the asymmetric D-shaped mitral valve annulus. This asymmetric configuration allows better geometric compatibility and seal between the prosthesis and the native annulus structure, improving fit without significantly increasing overall device complexity
2Device complexity
If a cylindrical artificial valve is used, then the device structure is simple, but the risk of left ventricular outflow obstruction is increased
Solution Approach 1:
The single cylindrical valve body is segmented into two separate semi-circular valve bodies. This segmentation creates a more open configuration that preserves the left ventricular outflow tract geometry, reducing the risk of obstruction while maintaining structural simplicity through the use of basic cylindrical components
Solution Approach 2:
Instead of using a single centralized cylindrical valve, the invention inverts the approach by using two distributed semi-circular valves. This inversion of the structural arrangement opens up the central outflow path, reducing obstruction risk while the individual valve components remain structurally simple
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
The dual-valve design improves the fit and seal within the mitral valve annulus, reducing the risk of left ventricular outflow obstruction and enhancing the security and effectiveness of the minimally-invasive procedure.
Implementation Method 1
The prosthesis can be compressed into a catheter and then expanded, for example, using shape-memory materials or balloons
Implementation Method 2
The prosthesis can be compressed into a catheter and then expanded, for example, using shape-memory materials or balloons
Data Source
AI summary
Disclosed herein are implantable dual-valve devices having first and second valve structures, a connector coupled to the structures, and first and second sealing members coupled on each side of the device, along with related methods of deploying such devices.