Analyte sensor
AssigneeDexCom, Inc.
InventorsYing Li, Apurv Ullas Kamath, Richard C. Yang, Mark C. Brister
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Abstract
Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host's circulatory system.
Claims18
A method for evaluating a change in a sensitivity of an implanted analyte sensor over a predetermined time period, comprising:
- receiving sensor data from an analyte sensor implanted in a host, wherein the implanted sensor is configured to generate sensor data, wherein the sensor data comprises one or more sensor analyte values measured in a biological sample of a host;
- intermittently calculating a sensitivity of the analyte sensor;
- and
- evaluating, using an electronic device, a change in sensitivity by evaluating a plurality of time-spaced sensitivity calculations over a predetermined time period, wherein evaluating a change in sensitivity is based at least in part on using a priori sensitivity information throughout a sensor session, wherein the plurality of time spaced sensitivity calculations are not based on a blood-glucose measurement.
A method for evaluating a change in a sensitivity of an implanted analyte sensor over a predetermined time period, comprising:
- receiving sensor data from an analyte sensor implanted in a host, wherein the implanted sensor is configured to generate sensor data, wherein the sensor data comprises one or more sensor analyte values measured in a biological sample of a host;
- intermittently, using an electronic device, calculating a sensitivity of the analyte sensor;
- measuring a change in sensitivity by evaluating a parameter indicative of a change in solute transport of a membrane of the analyte sensor;
- and
- auto-calibrating the analyte sensor responsive to measurement of the change in sensitivity.
A method for evaluating a change in a sensitivity of an analyte sensor over a predetermined time period, the method comprising:
- receiving sensor data from an analyte sensor, wherein the sensor data comprises one or more sensor analyte values measured in a biological sample of a host;
- intermittently calculating a sensitivity of the analyte;
- filtering at least two sensitivity values, whereby filtered sensitivity values are obtained;
- and
- evaluating, using an electronic device, a change in sensitivity by evaluating the filtered sensitivity values over a predetermined time period, wherein evaluating a change in sensitivity is based at least in part on using a priori sensitivity information throughout a sensor session.
Dependencies are inferred from the claim text.