Embolic Device Socket Anchoring for Stable Delivery Wire Attachment
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Solution Overview
Problem
Existing embolic devices face challenges in securing the connection between the delivery wire and the embolic coil, particularly at the major junction, which can be improved for better stability and efficiency in delivering the devices to target sites within the vasculature.
Innovation Solution
A medical device is introduced that includes a socket with side walls and anchors to securely hold braid wires, and a loop to accommodate the delivery wire, eliminating the need for a coil as an intermediate interface, thereby enhancing the connection between the delivery wire and the embolic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil is used as an intermediate interface to connect the delivery wire to the embolic device, then the connection can be established, but the connection stability and reliability are insufficient
Solution Approach 1:
The patent removes the coil intermediate interface from the connection system. The delivery wire is directly connected to the embolic device body through a simplified junction structure, eliminating the coil component that provided inadequate connection stability. This extraction of the problematic intermediate element resolves the contradiction by improving reliability while reducing device complexity.
Solution Approach 2:
The patent merges the functions of the delivery wire attachment and the embolic device into a single integrated junction structure. Rather than having separate components (delivery wire, coil, embolic device), the invention combines these elements into a unified connection system where the delivery wire is directly anchored to the embolic device body, improving connection stability and reducing overall system complexity.
2Strength
If the major junction uses a simple adhesive connection, then the manufacturing is easy, but the connection strength and resistance to removal forces are insufficient
Solution Approach 1:
The patent segments the connection structure into distinct functional elements: an anchoring portion with engagement features (such as barbs or interlocking geometries) and a body portion. This segmentation allows the connection to incorporate mechanical strength features while maintaining manufacturing feasibility through modular construction and standardized components.
Solution Approach 2:
The patent incorporates pre-formed engagement features (such as barbs, hooks, or interlocking geometries) into the embolic device body during manufacturing. These preliminary structural features are built in advance to provide strong mechanical attachment points, eliminating the need for complex assembly operations or additional strengthening steps during the connection process.
3Reliability
If the embolic device is securely anchored to resist removal forces, then the delivery reliability is improved, but the detachment process becomes more complex
Solution Approach 1:
The patent employs a dynamic detachment mechanism where the anchoring features are designed to be strong during delivery but can be easily released through a simple trigger action. The engagement features (such as barbs or interlocking elements) are configured to provide firm attachment during pushing but can be disengaged through a straightforward mechanical or electrolytic release mechanism, maintaining delivery reliability while simplifying the detachment process.
Solution Approach 2:
The patent designs the connection system so that the anchoring function is temporary and purposeful. The delivery wire connection is maintained only during the delivery phase and is intentionally discarded (detached) after the embolic device is deployed. This temporary strong connection approach ensures delivery reliability while avoiding the need for complex permanent attachment 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 improved connection system ensures secure and efficient delivery of embolic devices to target sites, such as aneurysms, by resisting removal forces and allowing easy attachment to the delivery wire, thus improving the treatment efficacy.
Implementation Method 1
An electrolytically severable junction is susceptible to electrolysis and disintegrates when the pusher assembly is electrically charged in the presence of an ionic solution, such as blood or other bodily fluids.
Data Source
Figure 1~2B
Figure 3A~3B
Figure 4
AI summary
A medical device includes: a socket having one or more side wall(s) defining a cavity sized for receiving a plurality of braid wires, wherein the socket also has an end wall coupled to, and/or extending from, the one or more side wall(s); and a first anchor on an interior surface of the one or more side wall(s) of the socket, wherein the first anchor is configured to press against at least one of the braid wires after the socket has received the braid wires.