Implant Delivery Engagement Wire Mechanism
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Solution Overview
Problem
Current implant delivery systems face challenges in achieving precise placement and rapid release of implants at desired locations within the body, particularly in vascular regions, due to difficulties in controlling the release mechanism.
Innovation Solution
A medical system comprising an implant pusher shaft and an engagement wire, with a mechanism that includes a proximal engagement loop and an interface, allowing for secure engagement and controlled release of the implant through various configurations, including a cross pin, tubular body, and ramp body, to prevent unintended movement and facilitate precise deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a catheter-based delivery device is used to advance implants to the implantation site, then the implant can be delivered percutaneously, but precision of placement at the desired location is difficult to achieve
Solution Approach 1:
The engagement wire is designed to be movable relative to the pusher shaft, allowing it to dynamically transition between engaged and disengaged states. This dynamic mechanism enables precise control of implant placement by allowing the operator to advance the implant to the desired location and then rapidly disengage the wire for deployment, resolving the contradiction between precise placement and ease of operation.
Solution Approach 2:
The engagement wire acts as an intermediary element between the operator and the implant. It provides a controlled interface that allows precise positioning during delivery and then enables rapid release at the target site. The wire mediates the transition from secure engagement to controlled release, achieving both placement precision and operational ease.
2Reliability
If the implant is securely engaged during delivery, then the implant remains stable in the delivery system, but rapid release at the desired location becomes difficult to achieve
Solution Approach 1:
The engagement mechanism uses a dynamic wire that can rapidly change from an engaged state (providing stable holding) to a disengaged state (enabling rapid release). The wire's ability to be quickly repositioned or withdrawn allows the system to transition between these two states, achieving both reliable engagement during delivery and rapid release at the implantation site.
Solution Approach 2:
The engagement wire is pre-positioned and configured to securely hold the implant during delivery. The operator prepares the system with the wire in place before reaching the target site, ensuring stable engagement during the delivery phase. When the desired location is reached, the pre-configured wire can be quickly actuated to release the implant, achieving rapid deployment.
3Manufacturing precision
If the engagement mechanism allows for controlled release, then precise deployment is achieved, but the device complexity increases
Solution Approach 1:
The release function is extracted as a separate, simple mechanism involving the engagement wire that can be independently actuated. Rather than incorporating a complex integrated release system, the patent uses a separate wire that can be pulled or repositioned to release the implant. This extraction of the release function simplifies the overall device while maintaining controlled deployment capability.
Solution Approach 2:
The engagement wire serves as a simple intermediary component that provides controlled release functionality without adding significant complexity. The wire acts as a mediator between the operator's control and the implant's deployment, enabling precise controlled release through a simple mechanical action rather than requiring a complex automated or multi-component release mechanism.
Data Source
AI summary
The present teachings provide a medical system for delivering and deploying a medical implant, and the method of using thereof. Specifically, one aspect of the present teachings provides a medical system having an implant with an engagement loop, and a delivery system having an engagement wire and an interface. During implant delivery, the engagement wire engages the engagement loop of the implant. The engagement wire further interacts with the interface in order to prevent unintended disengagement of the engagement loop from the engagement wire. Certain embodiment of the present teaching also includes an implant release control mechanism fixedly attaching to a proximal end of the engagement wire. During implant delivery, the implant release control mechanism attaches the proximal end of the delivery system. During implant deployment, the implant release control mechanism detaches the proximal end of the delivery system.