Analyte sensor with lag compensation

  • US 9,804,148 B2
  • Filed: 04/29/2016
  • Issued: 10/31/2017
  • Est. Priority Date: 10/23/2007
  • Status: Active Grant
First Claim
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1. A system for monitoring an analyte using an in vivo sensor, the system comprising:

  • an analyte sensor configured for positioning in contact with bodily fluid under a skin surface;

    a display;

    a processor; and

    a memory operatively coupled to the processor, the memory storing instructions which, when executed by the processor, causes the processor to;

    obtain a plurality of analyte sensor data associated with a monitored analyte level from the analyte sensor;

    obtain one or more measured reference analyte data;

    generate a first subset of data pairs, each pair of the first subset comprising a reference analyte data and one or more of the plurality of analyte sensor data;

    determine a sensor sensitivity for the analyte sensor using the first subset of data pairs;

    obtain a plurality of calibrated sensor data by calibrating the plurality of analyte sensor data using the sensor sensitivity;

    generate a second subset of data pairs, each pair of the second subset comprising a reference analyte data and one or more of the plurality of calibrated sensor data;

    estimate a time lag constant based on the second subset of data pairs;

    estimate a lag corrected analyte level for the analyte sensor based on the estimated time lag constant; and

    output data for the lad corrected analyte level on the display as part of a graphical user interface.

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