Coaxial Coil Push Rod End Structure for Needle-Free Detachment
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Solution Overview
Problem
Conventional Guglielmi detachable coil detachment methods require complex operations and cause patient trauma due to needle insertion, necessitating a simpler and less invasive solution.
Innovation Solution
An end structure for a push rod comprising a metal wire, conductive tubes, and insulators that form a coaxial integral structure, allowing for simplified electrical detachment without needle insertion, using a detachment system with positive and negative terminals to create an electrical circuit for fast coil detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolytic detachment method with needle insertion is used, then reliable detachment is achieved, but patient trauma and operation complexity increase
Solution Approach 1:
The invention extracts and eliminates the needle insertion component from the detachment system. The external needle is replaced by an integrated end structure that incorporates all necessary electrical contact elements within the push rod assembly, thereby removing the source of patient trauma while maintaining detachment functionality
Solution Approach 2:
The invention merges the electrical contact elements directly into the push rod end structure. The conductive tubes, insulators, and contact surfaces are integrated into a unified assembly that combines the delivery function with the electrical detachment function, eliminating the need for separate needle insertion
2Reliability
If conventional electrolytic detachment method with needle insertion is used, then detachment is achieved, but operation time and complexity increase
Solution Approach 1:
The invention combines the electrical contact elements directly into the push rod end structure. The conductive tubes, insulators, and contact surfaces are integrated into a unified assembly, eliminating the need for separate needle insertion and simplifying the operational steps while maintaining reliable detachment
Solution Approach 2:
The end structure is pre-configured with all necessary electrical contact elements before insertion. The conductive tubes and insulators are assembled in advance to ensure proper electrical pathways are established, eliminating the need for complex intra-procedural setup and reducing operation time
3Reliability
If coaxial conductive tubes with insulator are used, then electrical contact reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The invention employs a nested structure where one conductive tube is placed inside another conductive tube, with an insulator positioned between them. This nested arrangement ensures reliable electrical isolation and contact pathways while using a modular assembly approach that simplifies manufacturing compared to creating fully integrated monolithic structures
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 solution simplifies the detachment process, reduces patient trauma, and enhances surgical efficiency by eliminating the need for needle insertion while ensuring reliable electrical contact and avoiding short circuits.
Implementation Method 1
The at least one insulator is connected to both the first conductive tube and the second conductive tube and configured to electrically insulate the first conductive tube from the second conductive tube
Implementation Method 2
The end structure is then energized, and an electrical circuit is formed through the human body. As a result, the bare metal section of the guide wire to which the positive terminal is connected is melted, resulting in detachment
Data Source
Figure 1~3A
Figure 3B~5B
Figure 6A~7B
AI summary
An end structure of a push rod for a guglielmi detachable coil, detachment systems thereof, and an embolization system are disclosed. The end structure includes at least one metal wire, at least one first conductive tube, at least one insulator and at least one second conductive tube. The at least one insulator is connected to both the first conductive tube and the second conductive tube and configured to electrically insulate the first conductive tube from the second conductive tube. One end of the at least one metal wire is electrically connected to the at least one second conductive tube. The first conductive tube and the second conductive tube are coaxially assembled into an integral structure, which can be inserted into an electrolytic device, resulting in the formation of an electrical circuit. In this way, operation to be performed by a physician can be simplified, and a coil can be detached within a short period of time, resulting in increased surgical efficiency. Moreover, insertion of a needle into a patient's "body as required by conventional electrolytic detachment techniques is dispensed with, reducing trauma and pain caused to the patient.