Single Trigger Wire Prosthesis Deployment System
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Solution Overview
Problem
Existing prosthesis deployment systems with multiple trigger wires are complex, inefficient, and require a larger system profile, as each trigger wire is needed to restrain a separate stent apex, leading to potential wire binding and increased force requirements.
Innovation Solution
A prosthesis deployment system utilizing a single trigger wire that extends through multiple apertures in a sleeve, forming loops to restrain multiple regions of a stent, allowing sequential release and reducing the complexity and profile of the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trigger wires are used to restrain separate stent apices, then each stent apex can be restrained individually, but the system complexity increases and the system profile becomes larger
Solution Approach 1:
The patent combines multiple trigger wire functions into a single trigger wire by creating loops that extend through multiple apertures in the sleeve. This single wire with multiple loops restrains multiple stent apices simultaneously, eliminating the need for separate trigger wires for each apex, thereby reducing system complexity while maintaining reliable restraint.
Solution Approach 2:
The single trigger wire is designed to perform multiple functions by forming loops that engage with multiple stent apices. Each loop can restrain a different stent apex, allowing one wire to serve the role of multiple wires, thus reducing the overall number of components and simplifying the system.
2Reliability
If multiple trigger wires are used to restrain separate stent apices, then each stent apex can be restrained individually, but the system profile becomes larger
Solution Approach 1:
The patent combines multiple trigger wire functions into a single trigger wire that extends through the sleeve and forms multiple loops. This consolidation reduces the system profile by eliminating the need for multiple separate wires, each requiring their own path through the delivery system, thereby maintaining a more compact and manageable system size.
3Reliability
If multiple trigger wires are used, then multiple stent apices can be restrained, but wire binding may occur and force requirements increase
Solution Approach 1:
The patent merges multiple trigger wire functions into a single continuous wire with multiple loops. This configuration eliminates wire binding issues that occur when multiple separate wires are used, as there are no adjacent wires to interfere with each other. The single wire design reduces friction and binding, thereby reducing the force required for release while maintaining reliable restraint of multiple stent apices.
4Device complexity
If a single trigger wire is used to restrain multiple stent apices, then system complexity is reduced, but the trigger wire must extend through multiple apertures in the sleeve
Solution Approach 1:
The patent segments the trigger wire into multiple loops, each passing through a different aperture in the sleeve. This segmentation allows the single wire to engage multiple stent apices while organizing the wire path in a structured manner. The loops are arranged to minimize interference and manage the extended wire path efficiently, reducing overall system complexity despite the increased wire path length.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The present embodiments provide prosthesis deployment systems. In one embodiment, a sleeve (7) has proximal and distal regions and a lumen (9) extending therebetween, and further comprising a first exit aperture (13a), a first entrance aperture (13a'), and a second exit aperture (13b). A trigger wire (11) is disposed at least partially within the lumen (9) of the sleeve (7). A prosthesis (19) has a delivery state and an expanded state, and further has first and second regions. In the delivery state, the trigger wire extends out of the lumen (9) through the first exit aperture (13a) of the sleeve (7), restrains the first region of the prosthesis (19), reenters the lumen (9) through the first entrance aperture (13a') of the sleeve (7), extends out of the lumen (9) through the second exit aperture (13b) of the sleeve (7), and restrains the second region of the prosthesis (19).