Elastic Loop Wire Prevents Implant Detachment
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Solution Overview
Problem
Current catheter-based delivery systems for intravascular implants often experience premature detachment of the implantable device due to friction and tortuosity in the vasculature, leading to improper deployment at the treatment site.
Innovation Solution
A delivery system incorporating an elastic loop wire that secures the implantable device to the delivery system, inhibiting premature detachment by applying tension when the pull wire translates proximally, ensuring the implant is released only when it reaches the target location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pull wire is used to secure the implant in the catheter, then the implant can be delivered through the vasculature, but the pull wire may translate proximally due to friction and tortuosity causing premature detachment
Solution Approach 1:
The elastic loop wire serves as an intermediary element between the pull wire and the implant. It is attached to the pull wire but interacts with the implant through a loop configuration that prevents direct friction-induced translation from affecting the implant security, thereby mediating the force transmission while preventing premature detachment
Solution Approach 2:
The elastic loop wire changes the mechanical parameters of the system by introducing elasticity and a loop configuration. This transforms the direct linear force transmission into a system where the loop can accommodate proximal movement of the pull wire without translating that movement to the implant, effectively changing how forces are distributed and transmitted
2Reliability
If the delivery system is made more secure to prevent premature detachment, then implant retention improves, but the system complexity increases
Solution Approach 1:
The elastic loop wire functions as a flexible element that provides security through its elastic properties and loop configuration rather than through complex rigid structures. This flexible approach achieves reliable implant retention while maintaining system simplicity, avoiding the need for multiple rigid components or complex locking mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The elastic loop wire effectively prevents premature detachment of the implant, ensuring it is securely deployed at the intended site within the body vessel, even in tortuous vasculature, by applying tension to the pull wire and utilizing a compressible distal portion for facilitated release.
Implementation Method 1
An elastic loop wire can include a loop opening which is positioned approximate a distal end of the tubular body and can include a proximal attachment point that is affixed to the pull wire. The elastic loop wire can be effective to inhibit premature detachment of the implantable medical device from the delivery system by inhibiting proximal translation of the pull wire with respect to the loop opening of the elastic loop wire.
Data Source
AI summary
Various systems and methods of deploying an implant to a target location of a body vessel are disclosed. A delivery system can include a tubular body having a lumen extending therethrough. A pull wire can extend through the lumen with the pull wire including a distal portion. An elastic loop wire can include a loop opening which is positioned approximate a distal end of the tubular body and can include a proximal attachment point that is affixed to the pull wire. The elastic loop wire and the pull wire can be positioned to secure the implantable medical device to the delivery system. The elastic loop wire can be effective to inhibit premature detachment of the implantable medical device from the delivery system by inhibiting proximal translation of the pull wire with respect to the loop opening of the elastic loop wire.