Dual Valve Prosthesis Lateral Offset for Transcatheter Implantation
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Solution Overview
Problem
Current minimally invasive techniques face challenges in performing dual heart valve replacements due to the difficulty in precisely deploying prosthetic mitral and aortic valves simultaneously, leading to potential paravalvular leakage and interference with adjacent heart valves, often requiring open-heart surgery.
Innovation Solution
A dual valve prosthesis with a stent structure and an annular frame that allows for lateral offsetting of prosthetic aortic and mitral valves, enabling concurrent deployment via a transcatheter procedure, using self-expanding materials like nitinol for secure anchoring and minimizing ventricular interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate prosthetic valves and delivery devices are used for dual valve replacement, then both valves can be replaced, but the procedure becomes extremely difficult due to lack of space in the left ventricle and interference with adjacent valves
Solution Approach 1:
The patent combines two separate prosthetic valves (aortic and mitral) into a single integrated dual-valve prosthesis with a unified delivery system. The first prosthetic valve is positioned in the aortic position and the second prosthetic valve is positioned in the mitral position, both secured to a common delivery catheter assembly. This merging eliminates the need to cross the first deployed valve with a second delivery system, significantly simplifying the deployment procedure while enabling simultaneous replacement of both valves through a single minimally invasive access point.
2Reliability
If prosthetic valves are deployed to replace stenotic or insufficient valves, then valve function is restored, but precise deployment becomes difficult to achieve proper functioning and avoid paravalvular leakage
Solution Approach 1:
The patent employs a sophisticated delivery system with multiple intermediaries to achieve precise valve placement. The delivery system includes a delivery catheter with positioning mechanisms, anchoring elements, and controlled expansion systems that act as intermediaries between the operator and the prosthetic valves. These intermediaries provide controlled deployment, precise positioning, and anchoring features that ensure accurate placement of both valves relative to the native valve annuli, minimizing paravalvular leakage while restoring proper valve function.
3Strength
If prosthetic mitral valve is secured against high systolic pressures, then valve fixation is achieved, but migration or movement can block the left ventricular outflow tract or inhibit aortic valve function
Solution Approach 1:
The patent employs dynamic anchoring mechanisms that adapt to the mechanical environment of the heart. The delivery system includes expandable anchoring elements, friction-based securing features, and flexible connection structures that allow the prosthetic mitral valve to dynamically respond to systolic pressures and ventricular motion. These dynamic features provide strong fixation during high-pressure phases while maintaining proper positioning to prevent migration that could block the left ventricular outflow tract or interfere with aortic valve function.
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
Enables precise and minimally invasive dual valve replacement, reducing the risk of paravalvular leakage and ventricular outflow tract obstruction, facilitating a single procedure for both valves without the need for open-heart surgery.
Implementation Method 1
a self-expanding stent structure (103) for securing the first prosthetic valve section (102) within the beating heart
Implementation Method 2
using self-expanding materials like nitinol for secure anchoring
Data Source
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AI summary
A dual valve prosthesis having first and second prosthetic valve sections is disclosed. The first prosthetic valve section includes a stent structure with a first prosthetic valve secured therein and the second prosthetic valve section includes an annular frame with a second prosthetic valve secured therein. When the dual valve prosthesis is in an expanded configuration, the annular frame extends from the stent structure such that the first and second prosthetic valves are laterally offset from each other. In a method in accordance herewith, the first and second prosthetic valve sections include prosthetic aortic and mitral valves, respectively, and the dual heart valve prosthesis is configured to replace both the native aortic and mitral valves of the heart in a single transcatheter heart valve implantation procedure.