Patent ID: 11872035
Assignee: ASCENSIA DIABETES CARE HOLDINGS AG
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method of determining glucose values during continuous glucose monitoring (CGM) measurements for determining a sensor sensitivity of a sensor without in-situ calibrations, the method comprising:
providing a CGM device including the sensor, a memory, and a processor;
applying a constant voltage potential to the sensor;
measuring a primary current signal resulting from the constant voltage potential during a time period and storing information indicative of the primary current signal in the memory;
applying, during the time period, a probing potential modulation sequence to the sensor;
measuring a plurality of probing potential modulation current signals resulting from the probing potential modulation sequence and storing information indicative of the plurality of probing potential modulation current signals in the memory;
determining an initial glucose concentration value based on a conversion function and the information indicative of the primary current signal, the initial glucose concentration value having a percent bias relative to a reference glucose concentration value;
determining a connection function value for correcting the percent bias of the initial glucose concentration value, the connection function value based on the information indicative of the primary current signal for the time period, the information indicative of the plurality of probing potential modulation current signals for the time period, and the reference glucose concentration value;
determining the sensor sensitivity by comparing the information indicative of the plurality of probing potential modulation current signals for the time period, the information indicative of the primary current signal for the time period, and the connection function value to identify differences in the plurality of probing potential modulation current signals relative to the primary current signal;
determining a final glucose concentration value based on the initial glucose concentration value and the connection function value; and
adjusting the final glucose concentration value based upon the sensor sensitivity.