Transcatheter Valve Prosthesis Groove Anchoring
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Solution Overview
Problem
Heart valve diseases, such as abnormal leaflet tissue growth or positioning, lead to degrading valve function, resulting in leakage or resistance to blood flow, necessitating a reliable transcatheter valve prosthesis for functional replacement.
Innovation Solution
A radially self-expandable tubular body with a preformed groove and a trapping member, including barbs, is deployed to secure native valve leaflets and chords, ensuring proper positioning and fixation of the transcatheter valve prosthesis within the heart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transcatheter valve prosthesis is deployed to replace a damaged heart valve, then valve function is restored and blood flow is improved, but the prosthesis may become dislodged or malpositioned during deployment
Solution Approach 1:
The tubular body is pre-formed with grooves at specific locations before deployment. These grooves are prepared in advance to receive and secure native valve tissue, ensuring proper positioning is achieved as part of the natural deployment sequence rather than requiring separate positioning adjustments
Solution Approach 2:
The self-expanding tubular body automatically engages with the native valve tissue through the pre-formed grooves during deployment. The structure secures itself to the heart wall and native valve without requiring additional positioning tools or manual adjustment, achieving reliable fixation through its own deployment mechanics
2Device complexity
If the tubular body is made self-expandable for easier delivery, then deployment complexity is reduced, but control over final positioning and securing to native tissue is compromised
Solution Approach 1:
The tubular body is divided into functional segments including a securing portion with grooves and a valve portion. This segmentation allows the securing portion to specialize in anchoring to native tissue while the valve portion handles blood flow function, enabling reliable fixation without complicating the overall self-expanding deployment mechanism
Solution Approach 2:
The pre-formed grooves act as an intermediary structure between the self-expanding tubular body and the native valve tissue. These grooves facilitate secure engagement by providing a mechanical interface that captures and holds the native tissue, bridging the connection between the implant and the heart structure without requiring complex fixation mechanisms
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 solution effectively replaces damaged heart valves, preventing leakage and resistance by securely anchoring the prosthesis, thereby restoring normal blood flow and valve function.
Implementation Method 1
a radially self-expandable tubular body having an inflow end and a preformed groove disposed at an outer surface of the tubular body
Implementation Method 2
at least partially piercing the portions of native valve leaflets and/or chords with one or more barbs on the trapping member to secure the tubular body to the portions of native valve leaflets and/or chords
Data Source
AI summary
A system for implanting a heart valve includes a radially self-expandable tubular body having an inflow end and an outflow end and a preformed groove disposed at an outer surface of the tubular body between the inflow end and the outflow end. The preformed groove extends at least partially around the tubular body, and has a circumferential opening facing radially outward of the tubular body. A valve is disposed within and attached to the tubular body, and a trapping member is configured to be moved into the preformed groove and form at least a partial loop around the preformed groove. An insertion member is configured to push the trapping member into the preformed groove. Additionally, a coupling member can provide a releasable attachment between the trapping member and the insertion member.