US 9,848,809 B2 · Advanced analyte sensor calibration and error detection

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.

Claims18

Dependent claims

A method for determining a sensitivity of a continuous analyte sensor, the method comprising:

applying a bias voltage to an analyte sensor;
applying a voltage step above the bias voltage to the analyte sensor;
measuring, using sensor electronics, a signal response of the voltage step from the analyte sensor;
determining, using the sensor electronics, a peak current of the signal response;
determining, using the sensor electronics, a sensitivity of the analyte sensor by correlating the peak current to a predetermined relationship of the peak current to sensor sensitivity, wherein the predetermined relationship is based at least in part on time of use of the analyte sensor;
receiving, using the sensor electronics, from the analyte sensor sensor data indicative of analyte concentration;
compensating, using the sensor electronics, the sensor data using the determined sensitivity of the analyte sensor;
determining, using the sensor electronics, an analyte concentration value based at least in part on the compensated sensor data;
and
displaying, using a display, the determined analyte concentration value.

7 more elements

Dependencies are inferred from the claim text.

Advanced analyte sensor calibration and error detection

Life of this patent

Advanced analyte sensor calibration and error detection

Life of this patent

Abstract

Claims18