ADVANCED ANALYTE SENSOR CALIBRATION AND ERROR DETECTION
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Accused Products
Abstract
Systems and methods for processing sensor data and self-calibration are provided. In some embodiments, systems and methods are provided which are capable of calibrating a continuous analyte sensor based on an initial sensitivity, and then continuously performing self-calibration without using, or with reduced use of, reference measurements. In certain embodiments, a sensitivity of the analyte sensor is determined by applying an estimative algorithm that is a function of certain parameters. Also described herein are systems and methods for determining a property of an analyte sensor using a stimulus signal. The sensor property can be used to compensate sensor data for sensitivity drift, or determine another property associated with the sensor, such as temperature, sensor membrane damage, moisture ingress in sensor electronics, and scaling factors.
37 Citations
24 Claims
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1-10. -10. (canceled)
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11. A method for determining reuse of an analyte sensor using sensor electronics coupled to the sensor, comprising:
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generating a data stream indicative of an analyte concentration of a host by applying a bias voltage to a first analyte sensor at least partially positioned within tissue of a host; applying a stimulus signal to the analyte sensor; measuring a response of the stimulus signal; comparing the measured response to one or more predetermined criteria; and initiating a sensor reuse routine if it is determined that the measured response satisfies the one or more predetermined criteria. - View Dependent Claims (12, 13, 14)
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15. An analyte monitoring system configured to determine reuse of an analyte sensor;
- the system comprising;
an analyte sensor configured for transcutaneous implantation into a host; and sensor electronics coupled to the analyte sensor, the sensor electronics configured to; generate a data stream indicative of an analyte concentration of a host by applying a bias voltage to a first analyte sensor at least partially positioned within tissue of a host, apply a stimulus signal to the analyte sensor, measure a response of the stimulus signal, compare the measured response to one or more predetermined criteria, and initiate a sensor reuse routine if it is determined that the measured response satisfies the one or more predetermined criteria. - View Dependent Claims (16, 17, 18, 19)
- the system comprising;
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20. A method for determining reuse of an analyte sensor, comprising,
generating a data stream indicative of an analyte concentration of a host by applying a bias voltage to a first analyte sensor at least partially positioned within tissue of a host; -
applying a stimulus signal to an analyte sensor; measuring a response of the stimulus signal; using a data association function to determine a correlation of the response to one or more recorded responses; and initiating a sensor reuse routine if it is determined that the correlation is above a predetermined threshold. - View Dependent Claims (21, 22, 23, 24)
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Specification