Anchoring Device for Artificial Heart Valve with Elastic Wire Support
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Solution Overview
Problem
Traditional anchoring methods for prosthetic heart valves during transcatheter mitral valve replacement can cause damage to native valve leaflets or compression of the native valve annulus, and may lead to paravalvular leakage, complicating the surgical process and increasing the difficulty of the operation.
Innovation Solution
An anchoring device with an anchoring section and a supporting section axially connected, where the anchoring section self-adapts to the prosthetic heart valve and the supporting section is arranged on one side to be fixed in a predetermined chamber, such as the atrium or ventricle, using elastic wires to exert anchoring force without crossing the native valve annulus, thereby preventing paravalvular leakage and simplifying the surgical process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional anchoring methods are used (anchoring stabs or over-sizing), then the prosthetic heart valve can be fixed at the mitral valve annulus, but damage to native valve leaflets or compression of native valve annulus tissue occurs
Solution Approach 1:
The anchoring device is divided into two separate functional sections: an anchoring section with an annular first cavity for accommodating the prosthetic heart valve, and a supporting section with elastic wires for providing anchoring force. This segmentation allows the anchoring function and supporting function to be performed by different structures, reducing harm to native valve structures while maintaining fixing reliability.
Solution Approach 2:
The anchoring device acts as an intermediary between the prosthetic heart valve and the native valve annulus. By using the anchoring section to accommodate the valve and the supporting section to provide elastic anchoring force, the device mediates the connection without requiring direct penetration or compression of native valve structures, thus preventing damage.
2Device complexity
If a docking coil with atrial and ventricular segments is used, then the anchoring device can be separated from the valve body, but the connection passes through the native valve annulus causing risk of paravalvular leakage
Solution Approach 1:
The supporting section with elastic wires is extracted from the valve body and positioned in the atrium or ventricle chamber, separate from the anchoring section that accommodates the valve. This extraction eliminates the need for the anchoring structure to pass through the native valve annulus, thereby removing the source of paravalvular leakage risk while maintaining device separation benefits.
3Device complexity
If a docking coil with complex release process is used, then the anchoring device can be separated from the valve body, but the positioning requirements are high and surgery duration increases
Solution Approach 1:
The elastic wires in the supporting section utilize their inherent elastic properties to automatically provide anchoring force and maintain positioning. This self-service mechanism eliminates the need for complex release processes and high-precision positioning operations, as the elastic structure naturally adapts to the chamber geometry and provides stable anchoring without requiring sophisticated control procedures.
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 anchoring device effectively prevents damage to native valve structures and reduces the risk of paravalvular leakage, simplifying the surgical procedure and improving the reliability and convenience of prosthetic heart valve implantation.
Implementation Method 1
the supporting section is configured to be arranged in a predetermined chamber of the predetermined object and can be fixed in the predetermined chamber by elastic force
Data Source
AI summary
An anchoring device (100, 200, 300) for prosthetic heart valve (400) and a prosthetic heart valve system. The prosthetic heart valve system includes an anchoring device (100, 200, 300) and a prosthetic heart valve (400). The anchoring device (100, 200, 300) includes an anchoring section (110, 210, 310) and a supporting section (120, 220, 320) that are axially connected to each other. The anchoring section (110, 210, 310) has an annular first cavity (111, 211, 311) configured to accommodate a prosthetic heart valve (400). The supporting section (120, 220, 320) is arranged on one side of the anchoring section (110, 210, 310) along the axial direction thereof. The supporting section (120, 220, 320) includes at least two elastic wires (121, 221, 321) arranged sequentially on the circumference of the anchoring section (110, 210, 310). Each elastic wire (121, 221, 321) has an end connected to the anchoring section (110, 210, 310), and a further end extending in a direction away from the anchoring section (110, 210, 310). The anchoring device (100, 200, 300) can utilize the structure of the predetermined chamber to anchor the prosthetic heart valve (400) without crossing the native valve annulus during implantation, thereby effectively preventing the occurrence of paravalvular leakage after the prosthetic heart valve (400) is implanted.