RFID Tag Integration on Glucose Test Strips for Calibration Data
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Solution Overview
Problem
Conventional glucose meters and test strips face challenges in accurately calibrating and tracking the chemical composition of test strips, leading to potential human errors and variations in glucose measurement results due to manufacturing uncertainties and lack of efficient data management.
Innovation Solution
Integration of an RFID sensor chip with a glucose test strip or package, containing calibration and expiration date information, and an RFID reader in the glucose meter for automatic data retrieval and programming, ensuring accurate glucose level computation and reducing human errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration data entry is used for test strips, then device complexity is reduced, but measurement precision and reliability deteriorate due to human errors and data management issues
Solution Approach 1:
The patent replaces manual data entry (mechanical/manual system) with RFID automated identification and data retrieval systems. The RFID tag stores calibration data and the reader automatically retrieves it, eliminating manual input errors while maintaining relatively simple device architecture through wireless communication protocols.
Solution Approach 2:
The test strip system performs self-identification and self-calibration through RFID tags. The strip automatically provides its calibration data to the meter without requiring user intervention, enabling the system to self-manage calibration information and reduce human error in data entry.
2Reliability
If RFID tags are integrated with each test strip, then measurement precision and data accuracy improve, but device complexity and manufacturing costs increase
Solution Approach 1:
The RFID tag serves multiple functions: storing calibration data, providing strip identification, tracking manufacturing batch information, and enabling authentication. This multi-functionality consolidates what would otherwise require separate systems into a single integrated component, managing complexity while improving reliability.
Solution Approach 2:
The RFID tag acts as an intermediary between the test strip and the meter system. It mediates data transfer by storing calibration information and providing it to the meter through wireless communication, simplifying the interface while ensuring accurate data exchange.
3Manufacturing precision
If calibration data is stored manually or externally, then manufacturing precision requirements are reduced, but loss of information increases due to data management errors
Solution Approach 1:
Calibration data is pre-stored in the RFID tag during the manufacturing process, before the test strip reaches the user. This preliminary action ensures data integrity by encoding calibration information directly into the strip's memory at the source, eliminating subsequent risks of data loss or corruption during storage and transfer.
Solution Approach 2:
The RFID tag creates a digital copy of the calibration data that is permanently stored with the test strip. This copying mechanism ensures that the calibration information is replicated accurately from the manufacturing system into the strip's memory, preventing data loss and ensuring consistency across production batches.
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 enables precise and reliable glucose monitoring by automatically retrieving calibration data and expiration dates, preventing errors and ensuring consistent chemical composition across test strips manufactured together, thereby enhancing the accuracy and efficiency of glucose measurements.
Implementation Method 1
An RFID sensor chip is coupled with the glucose sensor strip and the antenna. The chip has a memory containing digitally-encoded data representing calibration and/or expiration date information for the strip.
Implementation Method 2
These test strip sensors generally include a working electrode on a first substrate, a counter (or counter/reference) electrode on a second substrate, and a sample chamber. The sample chamber is configured so that when a sample (e.g., of blood) is provided in the chamber, the sample is in electrolytic contact with both the working electrode, the counter electrode and any reference electrodes or indicator electrodes that may be present. This allows electrical current to flow between the electrodes to affect the electrolysis (electrooxidation or electroreduction) of the analyte.
Data Source
AI summary
A glucose monitoring system, includes a glucose sensor strip or package of strips. The strip includes a substrate and a glucose monitoring circuit that has electrodes and a bodily fluid application portion of selected chemical composition. An antenna is integrated with the glucose sensor strip. An RFID sensor chip is coupled with the glucose sensor strip and the antenna. The chip has a memory containing digitally-encoded data representing calibration and/or expiration date information for the strip.