Side-Delivered Heart Valve Cinching for Large-Annulus Deployment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional transcatheter prosthetic heart valves face challenges in achieving a large expanded diameter due to the limitations imposed by the internal diameter of the delivery catheter, necessitating a need for prosthetic valves with deployment-assistive features that allow for a relatively small compressed size while enabling transcatheter delivery.
Innovation Solution
A cinching apparatus is used to reduce the circumference of the trans-annular sidewall of the valve during deployment, followed by release to expand and secure sealing within the native annulus, utilizing a self-expanding annular support frame with compressible wire cells and orthogonal deployment to facilitate delivery and deployment of large-diameter valves without an oversized catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional transcatheter prosthetic valves are compressed radially and loaded into a delivery catheter with the central annular axis parallel to the lengthwise axis of the delivery catheter, then the valve can be delivered through the patient's vasculature, but the expanded size (diameter) of the valve is limited by the internal diameter of the delivery catheter
Solution Approach 1:
The patent introduces a cinching apparatus that operates in the circumferential dimension to reduce the valve diameter during delivery. By cinching the circumference of the valve frame, the device enables compression in multiple dimensions (lengthwise and circumferential), allowing the valve to fit within a smaller delivery catheter while maintaining its full expanded diameter capability for sealing the native annulus.
2Quantity of substance
If the expanded diameter of traditional valves is increased to improve sealing of the native annulus, then better sealing is achieved, but the delivery catheter size must be increased
Solution Approach 1:
The cinching apparatus is deployed in advance to reduce the valve circumference before the valve is loaded into the delivery catheter. This preliminary compression action allows the valve to be loaded in a compressed state, and the valve can then be deployed to its full expanded diameter for proper sealing, without requiring an oversized delivery catheter.
3Quantity of substance
If more material and structure are compressed into a smaller space to increase valve diameter, then the expanded valve size is improved, but the complexity of compression and delivery increases
Solution Approach 1:
The cinching apparatus serves as an intermediary device that temporarily modifies the valve geometry during delivery. This separate cinching mechanism works in conjunction with the valve structure, allowing complex multi-dimensional compression without requiring the valve itself to be overly complex. The cinching apparatus can be released after delivery, simplifying the overall system.
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 the delivery and deployment of large-diameter prosthetic heart valves directly into the tricuspid valve without an oversized catheter, ensuring secure sealing and predictable seating within the native annulus.
Implementation Method 1
the valve having an annular support frame having compressible wire cells that facilitate rolling, folding, compressing in height and/or width
Implementation Method 2
A cinching apparatus is used to reduce the circumference of the trans-annular sidewall of the valve during deployment
Implementation Method 3
followed by release of the cinching apparatus to expand the circumference to full size and obtain a secure sealing of the native annulus
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.