Patent ID: 11950904
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 comprising:
providing a CGM device including a sensor, a bias circuit, a memory, and a processor;
applying a constant voltage potential to the sensor via the bias circuit;
measuring a primary current signal resulting from the constant voltage potential and storing the measured primary current signal in the memory;
applying a probing potential modulation sequence to the sensor,
wherein applying the probing potential modulation sequence comprises applying a plurality of voltage potentials in sequence, each of the plurality of voltage potentials applied at a distinct time period during the continuous glucose monitoring;

measuring a plurality of probing potential modulation current signals resulting from each of the plurality of voltage potentials in the probing potential modulation sequence and storing the plurality of measured probing potential modulation current signals in the memory,
wherein measuring the plurality of probing potential modulation current signals comprises measuring a first output current at a start of the distinct time period for applying each one of the plurality of voltage potentials and measuring a second output current at an end of the distinct time period for applying each one of the plurality of voltage potentials such that a plurality of first output currents and a plurality of second output currents is measured for the plurality of voltage potentials in the probing potential modulation sequence,
wherein the plurality of measured probing potential modulation current signals comprises the plurality of first output currents and the plurality of second output currents;

determining an initial glucose concentration based on a conversion function and one of the plurality of measured probing potential modulation current signals;
determining a connection function value based on the measured primary current signal and the plurality of measured probing potential modulation current signals,
wherein determining the connection function value is based at least partially on a ratio of each of the plurality of second output currents relative to one of the plurality of first output currents measured at the start of the distinct time period during which each of the plurality of second output currents was measured; and

determining a final glucose concentration based on the initial glucose concentration and the connection function value.