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US 9,804,148 B2Granted
Analyte sensor with lag compensation
AssigneeAbbott Diabetes Care Inc.
InventorsGary Alan Hayter, Kenneth J. Doniger, Erwin Satrya Budiman
Life of this patent
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Abstract
In particular embodiments, methods, devices and systems including calibrating analyte data associated with a monitored analyte level received from an analyte sensor based on a reference measurement, determining a lag time constant associated with the calibrated analyte data, and performing lag correction of the calibrated analyte data based on the determined time lag constant are disclosed.
Claims16
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.
12 more elements
An apparatus for calibrating an analyte sensor, comprising:
- a communication component configured to receive signals associated with a monitored analyte level from the analyte sensor in contact with bodily fluid under a skin surface;
- a display;
- one or more processors operatively coupled to the communication component and configured to process the received signals;
- and
- a memory for storing instructions which, when executed by the one or more processors, causes the one or more processors to:
- obtain a plurality of analyte sensor data associated with the monitored analyte level from the analyte sensor in contact with the bodily fluid;
- 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 lag corrected analyte level on the display as part of a graphical user interface.
12 more elements
Dependencies are inferred from the claim text.