Detachable Link Guide Member Inhibit Coil Jamming
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Solution Overview
Problem
Existing endovascular coil delivery systems face challenges with premature deployment and jamming due to slow electrolytic release and the need for additional control mechanisms in mechanical connections.
Innovation Solution
A detachable link system with guide members that inhibit unwanted detachment during transit through a catheter, allowing for self-detachment upon exiting, featuring engaging members with transverse slots and extensions that limit movement, ensuring precise placement and reducing the risk of jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrolytic release is used to detach the coil from the pusher, then accurate coil placement is achieved, but detachment time is extended and rapid release does not occur
Solution Approach 1:
The patent replaces the chemical/electrolytic detachment mechanism with a purely mechanical interlocking system. The detachable link uses interlocking arms with guide members that provide mechanical constraint during delivery, then allow mechanical detachment at the target site, eliminating the time-consuming electrolytic process while maintaining placement accuracy
Solution Approach 2:
The detachable link serves as an intermediary component between the pusher and the coil/implant. It provides a controlled detachment mechanism where the guide members temporarily constrain the link during delivery, then release to allow separation at the precise target location, solving both accuracy and timing requirements
2Speed
If mechanical connections with control wires are used for coil detachment, then quick detachment is achieved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent extracts the control wire mechanism from the system and replaces it with a self-contained detachable link that has built-in guide members. The detachment function is integrated into the link structure itself, eliminating the need for separate control wires and reducing overall device complexity while maintaining quick detachment capability
Solution Approach 2:
The detachable link is designed to be self-actuating through its guide member structure. The guide members provide automatic constraint during delivery and automatic release at the target site without requiring external control wires or complex actuation mechanisms, achieving quick detachment with minimal complexity
3Ease of operation
If detachable links allow free movement of engaging members during catheter transit, then easy deployment is achieved, but premature detachment and jamming occur
Solution Approach 1:
The guide members dynamically constrain the engaging members during catheter transit, then release this constraint at the target site. This dynamic control allows the system to transition from a constrained state (preventing premature detachment) to an unconstrained state (enabling easy deployment), resolving the contradiction between safety and ease of operation
Solution Approach 2:
The guide members are pre-configured to provide constraint during delivery, ensuring that the engaging members remain properly aligned and constrained before reaching the target site. This preliminary constraining action prevents premature detachment and jamming, while the design inherently allows easy deployment once the constraint is released
Data Source
AI summary
Described herein are various implant delivery methods and systems that include a detachable link for connecting an implantable device and a control wire. The detachable link can include an elongate body comprising a first arm with a mating surface having a slot extending the width of the elongate body and a second arm having a mating surface that includes a extension portion adapted to mate with the slot. A guide member can extend between the first and second arms and inhibit relative transverse and/or rotational movement between the first and second arms.