Calibration Methods for a Bandage-Type Analyte Sensor

A method comprising:

• operating a body-mountable device, wherein the body-mountable device comprises:
• a flexible substrate, wherein the flexible substrate is configured to be mounted to a skin surface;
• a sensor configured to generate an electrical signal, wherein the electrical signal is related to a physiological property;
• an analog-to-digital converter, wherein the analog-to-digital converter is configured to receive the electrical signal generated by the sensor and to generate digital codes related to the received electrical signal, wherein the analog-to-digital converter is disposed on the flexible substrate;
• and
• a controller operably coupled to the analog-to-digital converter, wherein the controller is disposed on the flexible substrate;
• wherein the operating comprises:
• obtaining, by the controller, calibration data;
• generating, by the controller operating the sensor, a plurality of samples of the electrical signal related to the physiological property;
• generating, by the controller operating the analog-to-digital converter, a plurality of digital codes corresponding to respective samples of the electrical signal generated using the sensor;
• recording, by the controller, the generated plurality of digital codes;
• determining, by the controller, that a trigger condition is met;
• and
• determining, by the controller responsive to determining that the trigger condition is met, at least one value of the physiological property based on at least one recorded digital code and the calibration data.

A body-mountable device comprising:

• a flexible substrate, wherein the flexible substrate is configured to be mounted to a skin surface;
• a sensor configured to generate an electrical signal, wherein the electrical signal is related to a physiological property;
• an analog-to-digital converter, wherein the analog-to-digital converter is configured to receive the electrical signal generated by the sensor and to generate digital codes related to the received electrical signal, wherein the analog-to-digital converter is disposed on the flexible substrate;
• a communications interface, wherein the communications interface is disposed on the flexible substrate;
• and
• a controller operably coupled to the analog-to-digital converter, wherein the controller is disposed on the flexible substrate, wherein the controller is configured to perform controller operations comprising:
• operating the sensor, during a first period of time, to generate at least one sample of the electrical signal related to the physiological property;
• operating the analog-to-digital converter, during the first period of time, to generate at least one digital code corresponding to the respective at least one sample of the electrical signal generated by the sensor;
• transmitting, using the communications interface, an indication of the generated at least one digital code to an external system;
• receiving, using the communications interface, information indicating a specified set of digital codes from the external system;
• operating the sensor, during a second period of time, to generate a plurality of samples of the electrical signal related to the physiological property;
• operating the analog-to-digital converter, during the second period of time, to generate a plurality of digital codes corresponding to respective samples of the electrical signal generated by the sensor;
• determining whether each of the generated plurality of digital codes corresponds to a digital code of the specified set of digital codes;
• and
• responsive to determining that a particular generated digital code corresponds to a digital code of the specified set of digital codes, providing an alert indication.