Electrochemical Test Strip Electrode Loop for Sample Volume Detection
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Solution Overview
Problem
Conventional electrochemical test strips with additional electrodes to determine sample volume are inefficient, leading to incomplete chemical reactions and erroneous measurements due to insufficient sample coverage, as they rely on single reaction signals and additional electrodes, which increase strip volume and complexity.
Innovation Solution
An electrochemical test strip with an electrode loop design adjacent to the sampling port, utilizing two sets of electrodes to generate volume signals, allowing for accurate determination of sample volume by analyzing the difference between these signals, ensuring sufficient sample coverage before proceeding with measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional electrodes are added to the reaction region to determine sample volume, then sample coverage detection capability is improved, but device complexity and strip volume increase
Solution Approach 1:
The patent makes the existing electrodes adjacent to the sampling port serve dual functions: their primary function for concentration measurement is retained, and they additionally function as volume detection electrodes by measuring capacitance values. This eliminates the need for separate volume detection electrodes, reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent utilizes the capacitance measurement capability of existing electrodes to detect sample volume, allowing the same electrodes to perform both concentration measurement and volume detection. This multi-functional approach reduces the total number of electrodes required while improving sample coverage detection accuracy.
2Measurement precision
If additional electrodes are added to the reaction region to determine sample volume, then sample coverage detection capability is improved, but strip volume increases
Solution Approach 1:
The patent makes the existing electrodes adjacent to the sampling port serve dual functions: their primary function for concentration measurement is retained, and they additionally function as volume detection electrodes by measuring capacitance values. This eliminates the need for separate volume detection electrodes, reducing device complexity while maintaining measurement precision.
3Device complexity
If single reaction signal is used for measurement, then measurement process is simplified, but measurement accuracy deteriorates due to inability to detect insufficient sample volume
Solution Approach 1:
The patent introduces feedback by measuring capacitance values of electrodes adjacent to the sampling port to detect sample volume. This feedback mechanism allows the system to determine whether sufficient sample has been applied before proceeding with concentration measurement, preventing erroneous results from insufficient sampling while maintaining a relatively simple measurement process.
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
This approach enables precise determination of sample volume, preventing incomplete reactions and erroneous measurements by ensuring adequate sample coverage, thus improving measurement accuracy and reducing the number of electrodes required.
Implementation Method 1
the first and second signal loops reflect on a volume of the reaction region
Implementation Method 2
After injection of the sample into the reaction region by capillarity
Data Source
AI summary
An electrochemical test strip, measurement system and method for determining sample content in the reactive region of the electrochemical test strip are presented. The electrochemical test strip comprises an insulator substrate which includes an electrode system disposed thereon. The electrode system includes at least one pair of electrodes. A lower plate which includes a reactive region and a sampling cell is disposed on the insulator substrate. An upper plate is disposed on the lower plate, wherein the at least one pair of electrodes is designed as an electrical loop adjacent to the sampling port.