Radiotransparent Electrode Bonding Layer for Corrosion Mitigation
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Solution Overview
Problem
Existing biomedical electrodes used for defibrillation and other medical procedures face issues such as electrochemical galvanic corrosion and electrical arcing between the leadwire and the electrode, leading to reduced conductivity, radio transparency, and shelf-life, as well as potential fire hazards.
Innovation Solution
A radiotransparent electrode design is introduced, featuring a bonding layer between the stripped end of the leadwire and the conductive layer, which separates the leadwire from direct contact with the conductive layer. This design uses a conductive tape or epoxy as the bonding layer, providing a robust electrical pathway while reducing or eliminating corrosion and arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leadwire directly contacts the conductive layer of the electrode, then the electrical connection is simple and direct, but electrochemical galvanic corrosion and electrical arcing occur between the leadwire and conductive layer, reducing conductivity, radio transparency, and shelf-life
Solution Approach 1:
The patent introduces a bonding layer as an intermediary component between the leadwire and the conductive layer. This bonding layer serves as a mediator that prevents direct contact between the leadwire and conductive layer, thereby eliminating galvanic corrosion and electrical arcing while maintaining electrical conductivity. The bonding layer is specifically designed to be conductive, radio-transparent, and mechanically robust to fulfill multiple functions simultaneously.
2Reliability
If a bonding layer is introduced between the leadwire and conductive layer, then corrosion and arcing are reduced or eliminated, but the device structure becomes more complex
Solution Approach 1:
The bonding layer is designed to perform multiple functions simultaneously: it provides mechanical bonding between components, establishes electrical conductivity, maintains radio transparency for imaging, and prevents corrosion and arcing. By consolidating these multiple functions into a single component, the patent avoids increasing overall device complexity while achieving improved reliability and safety.
3Illumination intensity
If radiotransparent materials are used for the electrode, then X-ray transmission is improved for medical diagnosis, but the materials must be carefully selected to maintain adequate conductivity
Solution Approach 1:
The patent employs composite material strategies where the bonding layer combines radiotransparent materials with conductive properties. This allows the electrode to maintain both X-ray transparency for medical imaging and adequate electrical conductivity for defibrillation and monitoring functions. The composite approach enables simultaneous satisfaction of optical and electrical requirements.
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 use of a bonding layer between the leadwire and the conductive layer effectively reduces corrosion and arcing, enhancing the electrode's conductivity and radio transparency, thereby extending its shelf-life and usability while minimizing safety risks.
Implementation Method 1
the bonding layer is itself sufficiently conductive and mechanically rigid so as to provide a robust electrical pathway between the leadwire and the conductive layer
Implementation Method 2
the use of such materials has been shown to cause problems, such as electrochemical galvanic corrosion and electrical arcing between the wire and the electrode
Implementation Method 3
The electrode can be X-ray transmissive, for example, radiotransparent so as to exhibit complete X-ray transmission, or alternatively radiolucent so as to be substantially, but not completely, X-ray transmissive
Data Source
AI summary
A medical system is provided. The medical system includes an electrode with a backing pad having top and bottom surfaces. A conductive layer is attached to the top surface of the backing pad, and a conductive gel layer covers at least part of the top surface of the conductive layer. A first bonding layer covers at least part of the top surface of the conductive layer. The electrode can include a leadwire with a stripped end length, and at least a portion of the stripped end length is disposed between the first bonding layer and a second bonding layer that also contacts the first bonding layer. The coupled-together first and second bonding layers are disposed at least in part between the conductive layer and the conductive gel layer.