Valve Leaflet Fixation Locking Mechanism for Precise TEER Positioning
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Solution Overview
Problem
Existing transcatheter edge-to-edge repair procedures for MVR and TVR are sometimes referred to as transcatheter edge-to-edge repair procedures are costly and their efficiency is affected by NOx and SO2.
Innovation Solution
The implantable fixation device includes a first fixation element and a second fixation element, with an actuation mechanism and a lock mechanism to secure tissue, allowing for precise positioning and fixation of valve leaflets to prevent regurgitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transcatheter edge-to-edge repair procedures are used for MVR and TVR, then the treatment of valve regurgitation is achieved, but the procedure becomes costly and efficiency is reduced
Solution Approach 1:
The fixation device is divided into multiple independent fixation elements (first fixation element and second fixation element) that can be positioned and secured separately on opposite sides of the tissue, allowing for staged deployment and independent adjustment of each element
Solution Approach 2:
The fixation elements are designed with pre-configured actuation mechanisms and lock mechanisms that are prepared in advance, enabling quick deployment and securing of tissue without requiring complex sequential operations during the procedure
2Reliability
If fixation elements are designed with actuation and lock mechanisms for precise positioning, then tissue fixation reliability is improved, but device complexity increases
Solution Approach 1:
The fixation elements incorporate movable components including a stud that moves in an axial direction and a wedging element that can move between engaged and disengaged positions, allowing the device to transition between deployment and locking states
Solution Approach 2:
The lock mechanism uses a biasing element that automatically biases the wedging element toward the engaged position, providing self-locking functionality without requiring additional actuators or complex control systems
Data Source
AI summary
An implantable fixation device includes fixation elements and gripping elements for fixating tissue. A stud is coupled to the fixation elements and is configured such that movement of the stud moves the fixation elements within a range of positions. A binding plate is configured to engage the stud to arrest its movement and to disengage the stud to allow its movement. A biasing element engages the binding plate and biases the binding plate into engagement with the stud. A harness with a single foot is engaged to the binding plate is configured such that tensioning the harness moves the binding plate in opposition to the bias of the biasing element so as to release the binding plate from the stud. Releasing tension on the harness returns the binding plate into engagement with the stud and secures the fixation elements in one position within the range of positions.