Cinch-Assisted Heart Valve Deployment for Large-Diameter Catheter Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional transcatheter prosthetic heart valves face challenges in achieving a larger expanded diameter due to the limitations of the delivery catheter size, necessitating a need for deployment-assistive features that allow for a relatively small compressed size while enabling transcatheter delivery.
Innovation Solution
A prosthetic heart valve with an integrated cinching apparatus, comprising a self-expanding annular support frame and tether or strap system, allows for orthogonal deployment by reducing the valve's radial size for insertion and expanding once positioned within the native annulus, utilizing a cinching mechanism to facilitate secure sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional transcatheter prosthetic valves are compressed radially for delivery, then the valve can be delivered through catheters, but the expanded diameter is limited by the internal diameter of the delivery catheter
Solution Approach 1:
The valve is delivered in an orthogonal orientation where the long axis of the valve is perpendicular to the long axis of the delivery catheter, rather than parallel. This dimensional change allows the valve to be compressed in a different geometry (folded along its length) that enables a larger expanded diameter while maintaining a compact compressed profile for catheter delivery
Solution Approach 2:
The valve frame is divided into multiple panels or segments that can be folded or collapsed along predetermined lines. This segmentation allows the valve to be compressed into a smaller profile for delivery while maintaining the ability to expand to a larger diameter upon deployment
2Ease of operation
If the valve is compressed to a smaller size for catheter delivery, then transcatheter delivery is enabled, but the valve requires deployment-assistive features to achieve proper sealing
Solution Approach 1:
The cinching apparatus is pre-installed on the valve frame before delivery, with tethers attached to the collar and perimeter wall. This preliminary preparation allows the cinching mechanism to be activated during deployment to compress the proximal side of the valve, facilitating proper seating and sealing without requiring complex real-time adjustments
Solution Approach 2:
The cinching apparatus acts as an intermediary mechanism between the delivery catheter and the valve frame. It provides a controlled method to compress and position the valve during deployment, mediating the transition from the compressed delivery state to the expanded deployed state while ensuring proper sealing
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 solution enables the deployment of a larger prosthetic heart valve through a smaller delivery catheter by orthogonal delivery, ensuring a secure seal and effective anchoring within the native annulus.
Implementation Method 1
a self-expanding annular support frame
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to anchor channels and subannular anchors for a transcatheter heart valve replacement (A61 F2/2412), and in particular for an orthogonally delivered transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially to the mitral valve, the valve having a height of about 5-60mm and a diameter of about 25-80mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.