Securement Wire Attachment for Intravascular Device Deployment
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Solution Overview
Problem
Existing delivery and detachment systems for intravascular treatment devices, such as embolic coils, face challenges in securely deploying and detaching the devices at target sites due to insufficient strength of the securement wire connections, leading to potential unintended detachment during deployment.
Innovation Solution
A mechanical delivery and detachment system with a securement wire robustly attached to the inner wall of a proximal inner tube via supplemental connection points, such as spot welds, along an axial section, enhancing the overall strength and minimizing the risk of detachment during deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a securement wire is used to hold the implantable intravascular treatment device during delivery, then the device can be transported to the target site, but the connection may detach during deployment due to insufficient strength
Solution Approach 1:
The connection system is divided into multiple securement elements: the securement wire itself, multiple welds along its length, and the crimp structure. This segmentation distributes the mechanical load across multiple points rather than relying on a single connection point, thereby increasing overall connection strength and reliability during deployment
Solution Approach 2:
The securement wire is pre-formed with bends and loops that are configured before delivery to engage with the implantable device. The wire is pre-secured to the delivery catheter through multiple welds and crimping operations before reaching the target site, ensuring the connection is established in advance and can withstand deployment forces
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 system ensures reliable and secure deployment and detachment of intravascular treatment devices by providing additional strength to withstand forces during deployment, preventing unintended detachment and ensuring effective occlusion of aneurysms.
Implementation Method 1
the securement wire is robustly attached along an axial section thereof to the inner wall of the proximal inner tube via one or more supplemental connection points able to withstand forces during deployment
Data Source
AI summary
Delivery and detachment system for an implantable intravascular treatment device, the system including an outer delivery tube and a proximal inner tube telescopically slidable within the lumen of the outer delivery tube. The proximal inner tube has a weld window radially inward cutout defined therein along an axial section between the proximal and distal ends. A securement wire disposed axially within the lumen of the proximal inner tube is secured to an inner wall of the lumen of the proximal inner tube via at least one supplemental connection point coinciding with the weld window. Also, the method for making the delivery and detachment system wherein one or more positioning wires threaded through the lumen of the proximal inner tube are manipulated to force the securement wire and the proximal inner tube in direct physical contact with one another along an axial section coinciding with the weld window.