Analyte Monitoring Device and Methods of Use
First Claim
1. A computer system suitable for processing analyte data, the computer system comprising:
- a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit rejects a reference data point obtained when the rate of change of the data stream is above a threshold.
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Accused Products
Abstract
An analyte monitor includes a sensor, a sensor control unit, and a display unit. The sensor has, for example, a substrate, a recessed channel formed in the substrate, and conductive material disposed in the recessed channel to form a working electrode. The sensor control unit typically has a housing adapted for placement on skin and is adapted to receive a portion of an electrochemical sensor. The sensor control unit also includes two or more conductive contacts disposed on the housing and configured for coupling to two or more contact pads on the sensor. A transmitter is disposed in the housing and coupled to the plurality of conductive contacts for transmitting data obtained using the sensor. The display unit has a receiver for receiving data transmitted by the transmitter of the sensor control unit and a display coupled to the receiver for displaying an indication of a level of an analyte. The analyte monitor may also be part of a drug delivery system to alter the level of the analyte based on the data obtained using the sensor.
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Citations
29 Claims
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1. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit rejects a reference data point obtained when the rate of change of the data stream is above a threshold.
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2. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the reference data point and the sensor data point are obtained at substantially corresponding times, and wherein the rate of change of the data stream is below a threshold at the time the sensor data point is obtained.
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3. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit forms calibration information based at least in part on at least one reference data point and at least one sensor data point, wherein the reference data point and the sensor data point are obtained at substantially corresponding times, and wherein the rate of change of the data stream is below a threshold at the time the sensor data point is obtained.
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4. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit creates a calibrates data point based at least in part on at least one sensor data point, wherein the sensor data point is obtained when the rate of change of the data stream is below a threshold.
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5. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit converts at least one sensor data point into a calibrated data point, wherein the rate of change of the data stream at the time at which the sensor data point is obtained is below a threshold.
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6. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit forms calibration data based at least in part on at least one calibration point, the calibration point comprising a reference data point and a sensor data point, wherein the reference data point and the sensor data point are obtained at substantially corresponding times; and
wherein the sensor control unit is configured to evaluate the calibration point, wherein the sensor control unit prevents the calibration point from influencing the calibration data if the rate of change of the data stream at the time the sensor data point is obtained is above a threshold.
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7. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and the sensor control unit compares a first reference data point to a second reference data point to determine whether the first reference data point is clinically acceptable, wherein the second reference data point is obtained prior to obtaining the first reference data point, and wherein the first reference data point is determined to be clinically acceptable if the difference between the first reference data point and the second reference data point is below a threshold.
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8. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit compares a first sensor data point to a second sensor data point to determine whether the first sensor data point is clinically acceptable, wherein the second sensor data point is obtained prior to obtaining the first sensor data point, and wherein the first sensor data point is determined to be clinically acceptable if the difference between the first sensor data point and the second sensor data point is below a threshold.
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9. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit determines whether the sensor data is acceptable, wherein the sensor data is determined to be acceptable if the rate of change of the data stream is below a threshold at the time the sensor data is obtained. - View Dependent Claims (10, 11, 12, 13)
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14. A computer system suitable for processing analyte data, the computer system comprising:
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a sensor control unit comprising;
a sensor circuit configured to receive sensor data, the sensor data comprising a data stream comprising a plurality of time spaced sensor data points from a substantially continuous analyte sensor; and
a processing circuit configured to determine a rate of change of the data stream, wherein the sensor control unit receives reference data from an analyte reference source, the reference data comprising at least one reference data point, and wherein the sensor control unit requests additional reference data when the rate of change of the data stream is above a threshold.
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15. A device for monitoring glucose concentration in a biological sample of a host, the device comprising:
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a substantially continuous glucose sensor that produces a data stream indicative of a glucose concentration in a host, the data stream comprising a plurality of time spaced sensor data points;
a sensor control unit that receives the data stream from the substantially continuous glucose sensor, wherein the sensor control unit comprises;
a sensor circuit configured to receive a biological sample from the host;
a measurement circuit to measure the concentration of glucose in the sample, the measured glucose concentration comprising a reference data point;
a processing circuit; and
a computer readable memory comprising;
instructions configured to cause the microprocessor to process the data stream received from the continuous glucose sensor;
instructions configured to cause the microprocessor to determine a rate of change of the data stream from the substantially continuous glucose sensor; and
instructions configured to cause the microprocessor to calibrate the data stream using the glucose concentration measured by the sensor circuit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification