Patent ID: 11883126
Assignee: DEXCOM, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method of compensating for drift in an analyte concentration sensor within a biological system using only a signal from an analyte concentration sensor, comprising:
measuring analyte concentration values using an indwelling analyte concentration sensor to obtain an indwelling analyte concentration sensor reading;
determining a first slow-moving average of the measured analyte concentration values of the analyte over a first period of time, and basing a first apparent sensitivity of the indwelling analyte concentration sensor based at least in part on the first slow-moving average;
following the first determining, determining a second slow-moving average of the measured analyte concentration values of the analyte over a second period of time, and basing a second apparent sensitivity of the indwelling analyte concentration sensor based at least in part on the second slow moving average; and
adjusting an actual sensitivity of the indwelling analyte concentration sensor to an adjusted value based on a difference between the first apparent sensitivity and the second apparent sensitivity when the difference between the first apparent sensitivity and the second apparent sensitivity meets a predetermined criteria, wherein the predetermined criteria is based on a range of acceptable sensitivity changes with respect to time.