Heart Valve Loading Member With Rotating Notch for Precise Deployment
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Solution Overview
Problem
Traditional surgical heart valve replacement is invasive and requires significant recovery time, while minimally invasive techniques like TMVR and TTVR face challenges in device design and patient selection, particularly for mitral and tricuspid valves.
Innovation Solution
A delivery system featuring a tubular loading member with a notch and a prosthesis retention member that allows for rotational and longitudinal movement, enabling secure engagement and deployment of heart prostheses through a catheter, using a prosthesis loading tool and notch cover to prevent radial expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical replacement is used, then effective valve replacement is achieved, but invasiveness and recovery time increase
Solution Approach 1:
The heart prosthesis is nested within the delivery system, which includes a catheter, tubular loading member, and prosthesis retention member. The prosthesis is loaded through the notch in the loading member and retained by the retention member, allowing it to be delivered minimally invasively through a catheter rather than requiring open surgery.
Solution Approach 2:
The delivery system acts as an intermediary between the operator and the heart prosthesis. The tubular loading member with its notch and the prosthesis retention member work together to facilitate loading and deployment of the prosthesis through a catheter, reducing the need for direct surgical intervention.
2Object-affected harmful factors
If minimally invasive techniques like TMVR and TTVR are used, then invasiveness is reduced, but device design complexity increases
Solution Approach 1:
The delivery system is segmented into distinct functional components: a catheter, a tubular loading member with a notch, and a prosthesis retention member. This segmentation allows each component to perform its specific function while simplifying the overall design and assembly process.
Solution Approach 2:
The tubular loading member serves multiple functions: it guides the prosthesis during loading, provides structural support, and incorporates a notch that facilitates engagement and retention. The retention member also provides both retention and deployment functions, reducing the need for additional separate components.
3Ease of operation
If a tubular loading member with notch and prosthesis retention member is used, then loading ease is improved, but rotational and longitudinal movement requirements increase
Solution Approach 1:
The tubular loading member and prosthesis retention member are designed to move relative to each other in both rotational and longitudinal directions. This dynamic design allows the operator to easily load the prosthesis by rotating and pushing the loading member, while the retention member automatically engages and secures the prosthesis in place.
Data Source
AI summary
A delivery system for a heart prosthesis includes a tubular loading member with a notch passing through its wall at a distal edge, and a prosthesis retention member positioned within the tubular loading member. The prosthesis retention member has multiple prosthesis retention areas shaped to engage prosthesis engagement portions of a heart prosthesis. The tubular loading member and the prosthesis retention member are longitudinally and rotationally movable relative to each other. The notch has multiple rotational positions that completely expose one of the prosthesis retention areas while covering the remaining areas. This delivery system allows for precise positioning and secure retention of the heart prosthesis during implantation.