RFID Tag Data Integrity for Medical Measurement Systems
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Solution Overview
Problem
Existing medical measuring systems lack a comprehensive method for automatically exchanging data between disposable and reusable parts, particularly in sterilizable environments, and fail to secure data against tampering, leading to potential corruption and operational disruptions.
Innovation Solution
A method utilizing RFID technology with iterative double storage and checksums ensures secure data exchange and integrity by writing data to an RFID tag on the disposable item, performing plausibility checks, and falling back to a previous data set in case of incomplete overwrites, ensuring continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is stored in a single location on the RFID tag for automated exchange, then data accessibility is improved, but data security and integrity deteriorate due to vulnerability to corruption and undetected tampering
Solution Approach 1:
The patent divides the RFID tag memory into multiple distinct storage locations (first data set and second data set) with different functions. One location stores current operational data while another stores backup/alternative data, allowing the system to maintain automated data exchange while ensuring data integrity through spatial distribution of data copies.
Solution Approach 2:
The patent pre-loads multiple data sets and checksums into the RFID tag during manufacturing before the disposable item is used. This preliminary preparation ensures that valid data is already available in the tag, enabling automated data exchange to proceed without corruption risks during critical measurement operations.
2Loss of information
If data is overwritten during use to update sensor information, then data currency is improved, but data corruption risk increases due to incomplete overwrites when disposable items are removed
Solution Approach 1:
The patent pre-loads complete data sets with checksums into the RFID tag during manufacturing. This preliminary action ensures that even if overwriting is interrupted, the tag contains at least one complete, valid data set that can be used without corruption.
Solution Approach 2:
The patent implements checksum verification after data writing operations. The measuring system calculates and verifies checksums of written data to detect incomplete overwrites. This feedback mechanism allows the system to identify corrupted data and prevent its use, maintaining data completeness even when updates are interrupted.
3Measurement precision
If checksum verification is performed for every data read, then data accuracy is improved, but system complexity increases due to additional verification steps
Solution Approach 1:
The patent combines the checksum verification process with the existing data reading operation in the measuring system. Rather than adding a separate verification step, the checksum check is integrated into the data exchange protocol, allowing accuracy verification to occur alongside normal data access without significantly increasing system complexity.
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 method ensures that correct data is always available, preventing operational disruptions and data corruption, even if the disposable item is removed during use, and allows for secure, automated data modification and monitoring within the medical measuring system.
Implementation Method 1
The use of RFID technology (Radio Frequency Identification) represents a particularly advantageous possibility of automatically making sensor-specific data available for the measuring system. For this purpose, the disposable item contains an RFID tag with an electronic memory chip and the reusable part contains an RFID reader/writer.
Data Source
Figure 1~3
AI summary
The present invention relates to a method for interchanging data of a disposable item with a reusable part of a medical measurement system when measuring a blood level, particularly a blood sugar level, wherein the data are written to a memory of an RFID tag of the disposable item when the disposable item is manufactured, and have at least one checksum, the disposable item is connected to the measurement system, the data included in the RFID tag are read by the measurement system and are subjected to a plausibility check on the basis of the at least one checksum, and in the event of a positive plausibility check the disposable item is cleared for use with the measurement system.