Wire Retention and Release Mechanisms for Endoluminal Prostheses
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Solution Overview
Problem
Existing endoluminal prosthesis delivery and deployment systems require complex and multi-step manual processes for wire retention and release, which can be cumbersome and less intuitive for operators.
Innovation Solution
A prosthesis delivery and deployment device featuring a sheath with a wire having a slack portion that is reduced and decoupled from the prosthesis through proximal movement, allowing for simultaneous withdrawal of the sheath and release of the wire, with optional configurations including a handle with a drum for slack management and a haemostatic valve for blood control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual multi-step wire release mechanisms are used, then wire retention and release can be achieved, but the device complexity and operational difficulty increase
Solution Approach 1:
The patent combines the wire release mechanism with the sheath withdrawal action. The wire is attached to the sheath such that when the sheath is withdrawn proximally, the wire is automatically released from the prosthesis. This merging of functions eliminates the need for separate manual wire release steps, reducing device complexity while maintaining reliable wire retention and release.
Solution Approach 2:
The wire release mechanism is designed to be self-actuating through the sheath withdrawal motion. As the sheath is pulled back, the attached wire automatically disengages from the prosthesis without requiring additional manual manipulation. This self-service mechanism simplifies the overall system by eliminating the need for complex manual release procedures.
2Reliability
If manual multi-step wire release mechanisms are used, then wire retention and release can be achieved, but the ease of operation decreases
Solution Approach 1:
The patent merges the wire release function with the sheath withdrawal action. The single motion of withdrawing the sheath simultaneously accomplishes both sheath retraction and wire release, making the operation intuitive and easier to perform while ensuring reliable wire retention and release.
Solution Approach 2:
The wire release mechanism performs the release function automatically during sheath withdrawal. The operator simply needs to withdraw the sheath, and the wire will automatically disengage from the prosthesis, eliminating the need for complex manual manipulation steps and improving ease of operation.
3Adaptability or versatility
If separate manual release mechanisms are used for proximal and distal ends, then selective releasing can be achieved, but the number of manual steps increases
Solution Approach 1:
The patent combines both proximal and distal wire release functions into a single sheath withdrawal motion. The wire is configured to attach to the prosthesis at both ends, and withdrawal of the sheath simultaneously releases both wires, reducing the number of manual steps while maintaining the capability for selective releasing through controlled withdrawal timing.
Data Source
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AI summary
Devices (20) for delivering and deploying a prosthesis are disclosed and comprise a sheath (50), a prosthesis (26) disposed within a distal end portion of the sheath, and a wire (72) having a first end coupled to the prosthesis and a second end coupled to the sheath. A body portion of the wire comprises a slack in the wire, and the sheath, prosthesis, and wire are configured so that a proximal movement of the sheath relative to the prosthesis reduces the slack in the wire, and a subsequent proximal movement of the sheath relative to the prosthesis decouples the wire from the prosthesis. Additional devices, systems, and methods are disclosed.