Invasive Multi-Electrode Electrochemical Sensor With Spiral Axle
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Solution Overview
Problem
Existing electrochemical sensors are non-invasive and lack the capability for continuous monitoring of biological/physiological parameters, and they are also costly.
Innovation Solution
A low-cost invasive multi-electrode electrochemical sensor design featuring wire electrodes with insulating sheaths, spiral invasion sections, and an axle for enhanced mechanical strength, allowing easy insertion and improved detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing electrochemical test strips are used, then production cost is low, but invasive detection capability is lost
Solution Approach 1:
The sensor is divided into distinct functional sections: a substrate section for mounting and electrical connection, and invasion sections with exposed conductive cores for insertion into biological tissue. This segmentation allows the sensor to maintain simple manufacturing processes while gaining invasive detection capability.
Solution Approach 2:
Different portions of the electrode have different structural characteristics - the substrate section has insulated wires for safe electrical connection, while the invasion section has exposed conductive cores for direct tissue contact and electrochemical detection. This local differentiation enables both low-cost manufacturing and invasive functionality.
2Adaptability or versatility
If wire electrodes with exposed cores are used for invasive detection, then invasive detection capability is improved, but mechanical strength deteriorates
Solution Approach 1:
The substrate acts as a structural support that merges the electrical connection function with the mechanical strength function. The substrate provides rigid support to the fragile invasion sections with exposed cores, preventing them from breaking during insertion and use while maintaining their electrochemical detection capability.
Solution Approach 2:
The substrate serves as an intermediary between the fragile invasion sections and the external environment. It provides mechanical protection and structural support to the exposed conductive cores during insertion and operation, enabling them to function without being damaged by mechanical stresses.
3Ease of operation
If invasion sections are made flexible for easy insertion, then ease of operation improves, but mechanical strength worsens
Solution Approach 1:
The invasion sections are designed to be flexible and dynamic, allowing them to bend and conform to tissue structures during insertion. This flexibility is achieved by using thin wire electrodes with minimal insulation, enabling easy insertion while the substrate provides overall structural support to prevent complete failure.
Data Source
AI summary
An invasive multi-electrode electrochemical sensor includes a substrate, plural wire electrodes and an axle. Each wire electrode includes an electrically conductive core and an insulating sheath that substantially covers, but exposes a proximal end and a distal end of, the electrically conductive core. Each wire electrode has a substrate section provided on the substrate and an invasion section extending outward from an edge of the substrate. The proximal end and distal end of the electrically conductive core of each wire electrode are located at the substrate section and invasion section of the wire electrode respectively. The invasion sections are wound around the axle spirally. The axle has a terminal end protruding beyond the distal ends of the invasion sections.