Patent ID: 11950904
Assignee: ASCENSIA DIABETES CARE HOLDINGS AG
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 7:
8. A continuous glucose monitoring (CGM) device comprising:
a wearable portion comprising:
a sensor configured to produce current signals from interstitial fluid;
a processor;
a memory coupled to the processor; and
transmitter circuitry coupled to the processor,
wherein the memory of the CGM device includes a connection function based on measurements of primary current signals generated by application of a constant voltage potential applied to a reference sensor, and measurements of a plurality of probing potential modulation current signals generated by application of a probing potential modulation sequence applied between primary current signal measurements,
wherein the application of 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 a glucose monitoring period, and
wherein the memory includes computer program code stored therein that, when executed by the processor, causes the CGM device to:
measure and store a primary current signal using the sensor and the memory of the wearable portion;
measure and store the plurality of probing potential modulation current signals associated with the primary current signal,
wherein the plurality of probing potential modulation current signals comprises a first output current measured at a start of the distinct time period for applying each of the plurality of voltage potentials and a second output current measured at an end of the distinct time period for applying each of the plurality of voltage potentials such that a plurality of first output currents and a plurality of second output currents are measured for the plurality of voltage potentials;

determine an initial glucose concentration based on a conversion function and one of the plurality of measured probing potential modulation current signals;
determine a connection function value based on the primary current signal and the plurality of measured probing potential modulation current signals,
wherein the connection function value is determined 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

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