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Publication Number
US-8410939-B2
Publication Date
2013-04-02
Expiration Date
Abstract
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. A 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.
Core Innovation
The invention relates to a glucose monitoring system using a glucose sensor strip that integrates an antenna and an RFID sensor chip with memory. The RFID sensor chip stores digitally encoded calibration and/or expiration date information, and the information includes chemical-composition-related data used for glucose computation.
An RFID reader, integrated into or connected to a glucose meter, reads, powers, and/or programs the RFID sensor chip. The reader supplies calibration data to support accurate glucose computation, and may identify strip type and lot/manufacture data as well as expiration information.
Embodiments describe RFID communication using RFID tags on a strip, a vial/box, or in a combined configuration with an RFID reader for streamlined meter operation. The document also discusses RFID frequency band options for operation and emphasizes reducing human error by automatically using calibration/expiration information stored on the RFID sensor chip.
Claims Coverage
The identified coverage centers on one independent claim directed to a method of determining an analyte level using an RFID sensor chip and an RFID reader in an analyte meter. The independent claim is refined by dependent claims that specify RFID operating parameters, sensor chip implementation, and additional analyte-system behaviors and communication features.
Interrogating an in vivo implanted RFID analyte sensor with an RFID reader in an analyte meter
Interrogating an in vivo implanted or partially implanted analyte sensor comprising an RFID sensor chip with an analyte meter comprising an RFID reader to receive analyte data from the RFID sensor chip.
Receiving analyte-level indicative signals and determining analyte level from circuitry
Receiving via circuitry of the analyte meter one or more signals indicative of the analyte level; determining via the circuitry the analyte level based on the one or more signals to provide a determined analyte level.
Displaying the determined analyte level on the analyte meter display
Displaying the determined analyte level on a display of the analyte meter.
Using RFID sensor-chip encoded information for analyte computation and calibration
Operating an RFID sensor chip associated with the analyte measurement such that the meter receives analyte data from the RFID sensor chip and determines the analyte level based on the signals received, with refinement that the RFID sensor chip can include digitally encoded data.
The coverage centers on interrogating an in vivo or partially implanted RFID sensor chip with an RFID reader in an analyte meter, receiving signals indicative of the analyte level, determining the analyte level via meter circuitry, and displaying the result; refinements include RFID operating frequency constraints, active sensor chip operation, and storage of digitally encoded data in the RFID sensor chip.
Stated Advantages
Automatically supplies calibration data for accurate glucose computation.
May identify strip type, lot/manufacture data, and expiration information.
Streamlined meter operation.
Reduces human error.
Documented Applications
Glucose monitoring using a glucose sensor strip and an RFID-enabled glucose meter for determining and displaying glucose (analyte) levels.
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