Methods and systems for correcting blood analyte measurements

A method of calculating and correcting blood analyte levels, the method comprising:

• using a transceiver to receive first sensor data from an analyte sensor;
• using the transceiver to calculate a first interstitial fluid analyte level based on at least the first sensor data;
• using the transceiver to calculate a first interstitial fluid analyte level rate of change based on at least the first interstitial fluid analyte level and one or more past interstitial fluid analyte levels;
• using the transceiver to calculate a first blood analyte level based on at least the first interstitial fluid analyte level and the first interstitial fluid analyte level rate of change;
• after receiving the first sensor data, using the transceiver to receive second sensor data from the analyte sensor;
• using the transceiver to calculate a second interstitial fluid analyte level based on at least the second sensor data;
• using the transceiver to calculate an updated first interstitial fluid analyte level rate of change based on at least the first interstitial fluid analyte level, the second interstitial fluid analyte level, and the one or more past interstitial fluid analyte levels;
• and
• using the transceiver to calculate a corrected first blood analyte level based on at least the first interstitial fluid analyte level and the first interstitial fluid analyte level rate of change.

A transceiver comprising:

• a sensor interface device configured to convey a power signal to an analyte sensor, receive first sensor data from the analyte sensor, and, after receiving the first sensor data, receive second sensor data;
• and
• a processor configured to:
• calculate a first interstitial fluid analyte level using at least the first sensor data;
• calculate a first interstitial fluid analyte level rate of change using at least the first interstitial fluid analyte level and one or more past interstitial fluid analyte levels;
• calculate a first blood analyte level using at least the first interstitial fluid analyte level and the first interstitial fluid analyte level rate of change;
• calculate a second interstitial fluid analyte level using at least the second sensor data;
• calculate an updated first interstitial fluid analyte level rate of change using at least the first interstitial fluid analyte level, the second interstitial fluid analyte level, and the one or more past interstitial fluid analyte levels;
• and
• calculate a corrected first blood analyte level using at least the first interstitial fluid analyte level and the first interstitial fluid analyte level rate of change.

A method of calculating and correcting levels in a first medium using measurements from a second medium, the method comprising:

• using a transceiver to calculate an initial second medium level based on at least initial measurement data;
• using the transceiver to calculate an initial second medium level rate of change based on at least the initial second medium level and one or more past second medium levels;
• using the transceiver to calculate a first medium level based on at least the initial second medium level and the initial second medium level rate of change;
• using the transceiver to calculate a subsequent second medium level based on at least subsequent measurement data;
• using the transceiver to calculate an updated second medium level rate of change based on at least the initial second medium level, the subsequent second medium level, and the one or more past second medium levels;
• and
• using the transceiver to calculate a corrected first medium level based on at least the initial second medium level and the updated second medium level rate of change.

A monitoring system for calculating and correcting levels in a first medium using measurements from a second medium, the system comprising:

• a sensor configured to take one or more measurements indicative of a level in the second medium;
• and
• a transceiver configured to:
• receive initial sensor data from the sensor, wherein the initial sensor data includes one or more measurements indicative of an initial level in the second medium;
• calculate an initial second medium level using at least the initial sensor data;
• calculate an initial second medium level rate of change using at least the initial second medium level and one or more past second medium levels;
• calculate a first medium level using at least the initial second medium level and the initial second medium level rate of change;
• receive subsequent sensor data from the sensor, wherein the subsequent sensor data includes one or more measurements indicative of a subsequent level in the second medium;
• calculate a subsequent second medium level using at least the subsequent sensor data;
• calculate an updated second medium level rate of change using at least the initial second medium level, the subsequent second medium level, and the one or more past second medium levels;
• and
• calculate a corrected first medium level using at least the initial second medium level and the updated second medium level rate of change.