Compressible Annular Frame for Side-Delivered Transcatheter Heart Valve
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Solution Overview
Problem
Current transcatheter heart valve replacement technologies face challenges with regurgitation and material durability issues, requiring expensive materials to withstand the mechanical stress of heart function, and often necessitate complex delivery methods that involve acute angles and oversized catheters.
Innovation Solution
A transcatheter heart valve with a compressible annular support frame that can be side-delivered via a 24-36Fr catheter, featuring a self-expanding design with a flow control component, allowing for deployment from the inferior vena cava directly into the mitral or tricuspid valve without requiring an oversized catheter, using a method that involves compressing the valve length-wise or orthogonally to the central axis for delivery and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional transcatheter valves are delivered via apex perforation with anchor rings, then the valve can be secured in position, but the delivery procedure becomes more invasive and complex
Solution Approach 1:
The invention removes the anchor ring component traditionally used for securing the valve in apex perforation delivery methods. Instead, the valve frame itself is designed with compression capability that allows it to be delivered through a catheter and expand at the target location without requiring separate anchoring mechanisms, thereby simplifying the overall device structure and delivery procedure while maintaining positioning stability
Solution Approach 2:
The invention inverts the traditional delivery approach by using a side-delivery method through the inferior vena cava rather than apex perforation. The valve is compressed into a catheter-compatible configuration for delivery, then expanded at the target location, reversing the conventional sequence of deployment and anchoring to achieve a less invasive procedure
2Strength
If stent-style replacement valves are used, then the valve structure provides structural support, but regurgitation and leakage problems persist
Solution Approach 1:
The invention employs a compression capable frame that can be compressed to fit within a delivery catheter and then expanded at the implantation site. This flexible structure, when expanded, provides adequate structural support to prevent regurgitation and leakage while allowing for precise positioning and sealing against the annulus, overcoming the limitations of rigid stent-style valves
3Area of moving object
If large diameter valves are deployed, then improved hemodynamic flow is achieved, but oversized catheters and acute angle approaches are required
Solution Approach 1:
The invention makes the valve frame dynamically compressible, allowing it to transition from a large expanded diameter configuration that provides good hemodynamic flow to a compressed configuration that fits within a standard delivery catheter. This dynamic compression capability enables the large diameter valve to be delivered through accessible vascular routes without requiring oversized catheters or acute angle approaches
Solution Approach 2:
The invention utilizes dimensional transformation by compressing the valve frame along its longitudinal axis to reduce its profile for catheter delivery, then expanding it radially at the implantation site to achieve the desired large diameter for optimal hemodynamic performance, effectively navigating spatial constraints through dimensional changes
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 deployment of a large diameter valve with improved hemodynamic flow and reduced material costs, minimizing regurgitation and mechanical stress, while allowing for a less invasive and more efficient delivery method compared to traditional transcatheter approaches.
Implementation Method 1
an annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonal, to the central axis
Implementation Method 2
A transcatheter heart valve with a compressible annular support frame that can be side-delivered via a 24-36Fr catheter, featuring a self-expanding design
Data Source
AI summary
The invention relates to a transcatheter heart valve replacement (A61F2/2412), and in particular Compression Capable Annular Frames for a side 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 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.