Prosthesis Delivery Device With Rotational Cannula Release
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Solution Overview
Problem
Current prosthesis delivery systems lack controlled and sequential release mechanisms for prostheses like stents and stent grafts, leading to potential misdeployment and reduced control during implantation in vascular systems.
Innovation Solution
A prosthesis delivery device with a deployment handle featuring a sheath, positioner, and cannula handle, allowing for controlled release of both the proximal and distal ends of the prosthesis through rotational and withdrawal mechanisms, eliminating the need for trigger wires and enhancing procedural control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional prosthesis delivery system is used, then the prosthesis can be delivered to the implantation site, but the release mechanism lacks control and sequential deployment capability
Solution Approach 1:
The delivery system is segmented into distinct functional components: an outer sheath for distal end release, an inner cannula for proximal end release, and a positioner for controlled positioning. Each component independently controls the release of specific prosthesis ends, enabling sequential and controlled deployment while maintaining manageable system complexity through modular design
Solution Approach 2:
A positioner component acts as an intermediary between the operator and the prosthesis release mechanism. The positioner includes engagement features that interact with both the inner cannula and outer sheath, mediating their coordinated movement and enabling precise control over the timing and sequence of prosthesis end releases
2Ease of operation
If trigger wires are used for prosthesis release, then the prosthesis can be deployed, but the control over proximal and distal ends is reduced
Solution Approach 1:
The release control is segmented into two independent systems: the outer sheath controls distal end release while the inner cannula controls proximal end release. This segmentation allows the operator to control each end's deployment independently, enhancing both ease of operation and deployment precision without relying on trigger wire mechanisms
Solution Approach 2:
The system employs dynamic, movable components (slidable outer sheath, rotatable inner cannula) that can be actively controlled by the operator during the procedure. This dynamic control mechanism provides real-time adjustability and precision in the release timing of each prosthesis end, improving procedural control compared to static trigger wire systems
Data Source
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AI summary
A prosthesis delivery device (100) comprises a proximal end (103) and a distal end (101), a prosthesis retention section (149) at the proximal end (103), and a prosthesis (200) retained on the prosthesis retention section (149). The prosthesis (200) has a proximal end (202) releasably attached at the prosthesis retention section (149) and a distal end (204) releasably attached at the prosthesis retention section (149). A sheath (110) is slidably disposed over the prosthesis (200). A delivery handle (102) near the distal end (101) the delivery device comprises a rotatable inner cannula (116) having a cannula lumen (118) and cannula handle (108). The cannula handle (108) is rotatable with the inner cannula (116). Further, a positioner handle (106) is releasably engaged with the cannula handle (108). Rotation of the inner cannula (116) releases the proximal end (202) of the prosthesis (200) from the delivery device (100) and withdrawal of the sheath (110) from over the prosthesis (200) releases the distal end (202) of the prosthesis (200) from the delivery device (100).