Helical Anchor Seal Panel for Mitral Valve Retention
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Solution Overview
Problem
Current methods for replacing the mitral valve using a catheter procedure face challenges such as retaining the valve in position, preventing leaks, anchoring the valve securely, and ensuring proper orientation, especially due to the high cyclic loads and movement of the heart, which can lead to dislodgement and poor hemodynamic performance.
Innovation Solution
A system utilizing a helical anchor with multiple coils and a seal structure to support and secure a heart valve prosthesis, featuring a seal that extends between adjacent coils to prevent leakage and includes a compressible element for enhanced anchoring, allowing for secure implantation and positioning of the valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a catheter procedure is used to replace the mitral valve, then recovery time is reduced and surgical incisions are avoided, but the valve may be dislodged due to high cyclic loads and heart movement
Solution Approach 1:
The anchor structure is divided into multiple coils that can be independently positioned above and below the valve annulus, allowing the anchor to secure the valve at multiple locations simultaneously, thereby preventing dislodgement while maintaining the minimally invasive catheter approach
Solution Approach 2:
The seal structure extends radially outward from the valve annulus into the left ventricle, creating a three-dimensional sealing zone that prevents blood leakage through the anchor and around the valve prosthesis, addressing the retention and sealing challenges of catheter-based mitral valve replacement
2Reliability
If a helical anchor with multiple coils is used to secure the valve, then valve retention is improved, but the device complexity increases
Solution Approach 1:
The seal structure is nested within the helical anchor coils, with the seal extending between adjacent coils to create a compact integrated assembly that reduces the overall device complexity while maintaining effective valve retention and sealing functionality
3Object-affected harmful factors
If a seal structure is added between coils to prevent leakage, then sealing performance is improved, but the device complexity increases
Solution Approach 1:
The seal structure is merged with the helical anchor by integrating the seal material between the coils of the anchor, creating a unified assembly where the sealing function is combined with the anchoring function, thereby preventing blood leakage without proportionally increasing device complexity
Data Source
AI summary
Anchors and systems for docking a prosthetic heart valve at a native heart valve are disclosed. An anchor can include at least three revolutions extending helically around a central axis of the anchor and a seal panel attached to a first revolution of the at least three revolutions and extending between, in a direction of the central axis, the first revolution and an adjacent, second revolution of the at least three revolutions. The seal panel comprises a fabric material and an internal support structure within the fabric material.