Valve Prosthesis Cinch Release Mechanism for Precise Implant Positioning
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Solution Overview
Problem
Existing delivery systems for transcatheter heart valve prostheses face challenges in controlling the size and positioning of the prosthetic device during implantation, leading to potential dislodging and mispositioning due to the need for temporary sutures and complex loading procedures.
Innovation Solution
A prosthetic device with a cinch member featuring a closed loop configuration that allows for controlled expansion and contraction, enabling secure engagement and disengagement with an engagement device, thereby limiting forces on the implanted prosthetic device and simplifying the loading process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temporary sutures are used to control prosthetic device size during implantation, then positioning control is improved, but device complexity and procedural time increase
Solution Approach 1:
The patent removes the temporary suture component from the implantation system. Instead of using separate sutures to control device size, the cinch member is integrated directly into the prosthetic device structure, allowing size control without external suturing materials or procedures
Solution Approach 2:
The cinch member is pre-configured in a compressed state within the delivery system, allowing the prosthetic device to be delivered in a compact form factor. The cinching action that controls device expansion is performed as part of the implantation process itself, rather than requiring separate preliminary suturing steps
2Measurement precision
If complex loading procedures are used to implant the prosthetic device, then positioning accuracy is improved, but procedural time and complexity increase
Solution Approach 1:
The cinch member enables dynamic control of the prosthetic device size during implantation. The device can be compressed to a small delivery configuration for navigation, then expanded to a larger functional configuration at the target site through the cinching mechanism, eliminating the need for complex manual loading procedures
Solution Approach 2:
The cinch member acts as an intermediary mechanism between the delivery system and the prosthetic device. It mediates the transition from compressed delivery configuration to expanded functional configuration, simplifying the loading and implantation process while maintaining positioning accuracy
3Volume of moving object
If the prosthetic device is delivered in a compressed configuration, then delivery through vasculature is improved, but device stability during implantation worsens
Solution Approach 1:
The prosthetic device transitions from a static compressed configuration during delivery to a dynamic expanded configuration during implantation. The cinch member controls this transformation, allowing the device to maintain stability in both states - compressed for vascular navigation and expanded for functional performance at the implantation site
Data Source
AI summary
In some examples, a medical system includes a prosthetic device configured to expand radially outward to position a valve assembly to control blood flow through an annulus of a heart valve. The prosthetic device includes a cinch member configured to control a device perimeter defined by the prosthetic device. In some examples, the cinch member defines a closed loop substantially around a valve axis of the prosthetic device. In examples, the prosthetic device includes an outer support configured to expand to engage the annulus of the heart valve. In examples, the outer support defines the perimeter. The medical system may include an engagement device configured to cause the cinch member to control the device perimeter when the prosthetic device is positioned within a chamber of a heart of a patient.