Self-Expanding Mitral Valve Frame for Leak-Resistant Delivery
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Solution Overview
Problem
Traditional cardiac valve replacement surgeries are traumatic, require long recovery times, and pose high risks for certain patients, while minimally invasive methods still necessitate heart arrest and can lead to complications such as peri-valvular leaks and damage to native structures.
Innovation Solution
A mitral valve prosthesis with a self-expanding frame and support arms that mimic native valve function, allowing percutaneous implantation, immobilizing native leaflets, and maintaining MA-PM continuity to prevent migration and damage, while reducing trauma and complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional open heart surgery is used for valve replacement, then complete valve replacement can be achieved, but patient trauma is severe and recovery time is long
Solution Approach 1:
The invention divides the valve replacement procedure into two separate steps: first delivering the frame structure to the mitral annulus, then separately delivering and attaching the valve leaflets. This segmentation allows the frame to be positioned minimally invasively while the valve is attached in a controlled manner, reducing patient trauma compared to traditional open heart surgery.
Solution Approach 2:
The frame is delivered and positioned at the mitral annulus before the valve leaflets are attached. This preliminary positioning of the structural framework allows subsequent valve attachment to be performed with minimal additional trauma, as the invasive procedure is completed in stages rather than requiring full open heart surgery upfront.
2Object-affected harmful factors
If minimally invasive valve repair techniques are used, then patient trauma is reduced, but heart arrest is still required and peri-valvular leaks occur
Solution Approach 1:
The frame acts as an intermediary structure that is first delivered to the mitral annulus and serves as a foundation for subsequent valve attachment. This intermediary framework enables minimally invasive delivery while providing a stable base that prevents peri-valvular leaks, thus maintaining valve function integrity without requiring heart arrest.
Solution Approach 2:
The invention replaces the traditional mechanical approach of direct valve implantation (which causes peri-valvular leaks) with a two-stage system where a frame is first established and then the valve is attached to it. This substituted mechanical system eliminates the leakage problem while maintaining minimally invasive benefits.
3Reliability
If artificial valve is implanted, then valve replacement is achieved, but native valve function is lost and complications occur
Solution Approach 1:
The invention extracts only the functional valve leaflets from the native valve complex while preserving the annular structure. By replacing only the necessary valve components and maintaining the native annulus and support structures, the procedure achieves valve replacement success while minimizing loss of native valve function and reducing complications.
4Duration of action of stationary object
If rigid artificial valve structure is used, then valve durability is improved, but physiologic contraction of ventricular wall is prevented
Solution Approach 1:
The frame is constructed with sufficient radial strength to prevent valve degradation and ensure durability, while its design allows it to flex and adapt to the dynamic motion of the ventricular wall during contraction. This flexible yet durable structure maintains valve function over time while accommodating physiologic movements.
Solution Approach 2:
The frame structure is designed to be dynamic rather than completely rigid, allowing it to adapt to the changing geometry of the ventricle during the cardiac cycle. This dynamic design enables the frame to maintain its structural integrity and support the valve while accommodating the natural contraction and relaxation of the ventricular wall.
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
Minimizes the traumatic impact on the heart, maintains native valve function, and provides a stable, durable replacement with reduced peri-valvular leaks and improved longevity.
Implementation Method 1
A mitral valve prosthesis with a self-expanding frame and support arms that mimic native valve function
Data Source
AI summary
Heart valve prostheses are provided for replacing a cardiac valve. The heart valve prosthesis includes a self-expanding frame including a first portion and a second portion. In the collapsed configuration, the first portion is positioned adjacent to the second portion. In the expanded configuration, the first portion moves to be positioned within an interior area of the second portion.