Atrioventricular Valve Clamping Device Segmented Occluding Member
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Solution Overview
Problem
Existing atrioventricular valve clamping devices fail to effectively eliminate leakage ports near the end portions, leading to incomplete occlusion and inadequate treatment of regurgitation, especially in tricuspid valves where excessive stress can cause perforation or tearing.
Innovation Solution
The atrioventricular valve clamping device features a resilient occluding member with pointed end portions that extend beyond the clamping member, allowing for precise fitting and coaptation with adjacent valve leaflets, reducing leakage and improving regurgitation treatment by limiting deformation and avoiding excessive stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the occluding ball deforms to clamp the valve leaflets, then the gap between valve leaflets is occluded, but the two end portions of the occluding ball fail to sufficiently fit the adjacent leaflets, creating leakage ports
Solution Approach 1:
The occluding member is divided into multiple segments including a body portion and two end portions. Each segment can deform independently or to different degrees, allowing the body portion to provide clamping force while the end portions maintain their shape to fit precisely against the valve leaflets and eliminate leakage ports.
Solution Approach 2:
Different portions of the occluding member are given different mechanical properties. The body portion is designed to be more compliant for clamping, while the end portions are designed with different stiffness or geometric characteristics to ensure precise fitting against the leaflet edges, creating different local qualities to solve both clamping and sealing requirements.
2Reliability
If the clamping arms apply excessive force to clamp the tricuspid valve leaflets, then the gap is occluded, but the fragile leaflets may be perforated or torn
Solution Approach 1:
The occluding member is designed with inherent compliance and energy-absorbing characteristics that cushion the clamping force before it reaches the valve leaflets. The gradual deformation of the occluding member distributes the stress over time and area, preventing sudden excessive forces that could perforate or tear the fragile tricuspid valve leaflets while still achieving effective occlusion.
3Reliability
If the occluding ball is deformed to clamp the valve leaflets, then the gap is reduced, but the two end portions spread further apart, enlarging leakage ports and increasing regurgitation
Solution Approach 1:
The occluding member is segmented into a body portion and end portions that can deform independently. When clamping force is applied, the body portion deforms to close the gap between valve leaflets, while the end portions are constrained or designed to maintain their relative positioning, preventing them from spreading apart and enlarging leakage ports.
Solution Approach 2:
The end portions are structurally integrated with or constrained by the clamping arms or support structure. This merging of functions ensures that when the body portion deforms for clamping, the end portions are guided to maintain proper positioning against the leaflet edges, combining the clamping action with positioning control to prevent leakage port enlargement.
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 device effectively decreases or eliminates leakage ports, enhancing the treatment of regurgitation in both mitral and tricuspid valves by ensuring proper coaptation and reducing the risk of valve damage from excessive stress.
Implementation Method 1
a resilient occluding member with pointed end portions that extend beyond the clamping member, allowing for precise fitting and coaptation with adjacent valve leaflets, reducing leakage and improving regurgitation treatment by limiting deformation and avoiding excessive stress
Data Source
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AI summary
An atrioventricular valve clamping device (100, 100', 100", 100'", 500, 600) and an atrioventricular valve clamping system are provided in the disclosure. The atrioventricular valve clamping device (100, 100', 100", 100'", 500, 600) includes a support member (110, 510, 610), an occluding member (120, 120', 120"), and a clamping member (130, 530, 630). A direction of a central axis of the occluding member (120, 120', 120", 120‴) is regarded as a Z-direction, a direction parallel to a width direction of the clamping member (130, 530, 630) and perpendicular to the Z-direction is regarded as a Y-direction, and a direction perpendicular to the Y-direction and the Z-direction is regarded as an X-direction. The support member (110, 510, 610) has a length in the Z-direction. The occluding member (120, 120', 120", 120‴) is sleeved on the support member (110, 510, 610) in the Z-direction.