Asymmetric Transcatheter Heart Valve Delivery System
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Solution Overview
Problem
Current transcatheter heart valve delivery systems are inadequate for precise implantation of mitral and tricuspid valves due to their perpendicular design, leading to instability and difficulty in controlling the release position of the valve prosthesis during surgery.
Innovation Solution
A transcatheter heart valve delivery system featuring a valve prosthesis with a non-perpendicular release end face and an outer tube with a matching non-perpendicular release end face, along with an inner tube arrangement that allows for telescopic accommodation and synchronized release, enabling precise positioning and smooth unfolding of the valve prosthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a perpendicular outer tube design is used in the delivery system, then the structure is simple and easy to manufacture, but the valve prosthesis cannot be precisely positioned and controlled during release for mitral and tricuspid valves
Solution Approach 1:
The outer tube release end face is designed with an asymmetric non-perpendicular angle (α) relative to the longitudinal axis, matching the asymmetric geometry of the valve prosthesis release end face. This asymmetric configuration enables precise positioning and controlled release of the valve prosthesis during deployment, resolving the positioning precision issue while maintaining structural simplicity.
2Reliability
If the outer tube release end face is not perpendicular to the axis, then the valve prosthesis can be precisely positioned and released synchronously, but the structure becomes more complex
Solution Approach 1:
The outer tube release end face is designed with a non-perpendicular angle (α) relative to the longitudinal axis, creating an asymmetric geometry that matches the valve prosthesis release end face. This design ensures stable and synchronous release of the valve prosthesis during deployment, preventing instability and swaying while maintaining structural simplicity through a single angular parameter.
3Manufacturing precision
If the end face shape of the valve prosthesis matches the outer tube release end face shape, then synchronized and circumferential release is achieved, but the manufacturing requirements increase
Solution Approach 1:
Both the outer tube release end face and valve prosthesis release end face are designed with matching asymmetric geometries defined by a non-perpendicular angle (α) to the longitudinal axis. This standardized asymmetric design enables synchronized and circumferential release of the valve prosthesis while simplifying manufacturing through consistent angular parameters rather than complex custom shapes.
Data Source
AI summary
A transcatheter heart valve delivery system, comprising a valve prosthesis (3), an outer tube (1) and an inner tube (2). The valve prosthesis (3) comprises a valve release end (31), comprising an end face not perpendicular to a valve axis; the outer tube (1) comprises an outer tube release end (11), comprising an end face fitted with the end face of the valve release end (31). An angle between the end face of the outer tube release end and a direction perpendicular to the axis of the outer tube and an angle between the end face of the valve release end and the direction perpendicular to the axis of the outer tube are both within a range of 0 to 60 degrees. The inner tube (2) is telescopically in the outer tube (1) in a penetrating manner. The valve prosthesis (3) is between the inner tube (2) and the outer tube (1).