System and methods for processing analyte sensor data for sensor calibration
First Claim
1. A method for calibrating data from a glucose sensor, wherein the glucose sensor is configured for transcutaneous implantation in a host while operably connected to sensor electronics, and wherein the glucose sensor comprises a membrane system, the method comprising:
- receiving information associated with a priori sensitivity for the glucose sensor prior to implantation of the glucose sensor in the host, wherein the information associated with the a priori sensitivity is derived at least in part from an analysis of glucose sensor sensitivities collected from a set of glucose sensors that are representative of the glucose sensor with respect to a predictive relationship between in vivo and in vitro sensitivities;
receiving sensor data from the glucose sensor by the sensor electronics after the glucose sensor is implanted in the host, wherein the sensor data is representative of a glucose concentration in the host; and
calibrating, using a processor operably connected to the sensor electronics, the sensor data received from the glucose sensor, wherein the calibrating is performed based at least in part on the received information associated with the a priori sensitivity without reliance on reference glucose values obtained from a self-monitoring blood glucose test after implantation of the glucose sensor in the host.
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Abstract
Systems and methods for processing sensor analyte data are disclosed, including initiating calibration, updating calibration, evaluating clinical acceptability of reference and sensor analyte data, and evaluating the quality of sensor calibration. The sensor can be calibrated using a calibration set of one or more matched sensor and reference analyte data pairs. Reference data resulting from benchtop testing an analyte sensor prior to its insertion can be used to provide initial calibration of the sensor data. Reference data from a short term continuous analyte sensor implanted in a user can be used to initially calibrate or update sensor data from a long term continuous analyte sensor.
2480 Citations
29 Claims
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1. A method for calibrating data from a glucose sensor, wherein the glucose sensor is configured for transcutaneous implantation in a host while operably connected to sensor electronics, and wherein the glucose sensor comprises a membrane system, the method comprising:
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receiving information associated with a priori sensitivity for the glucose sensor prior to implantation of the glucose sensor in the host, wherein the information associated with the a priori sensitivity is derived at least in part from an analysis of glucose sensor sensitivities collected from a set of glucose sensors that are representative of the glucose sensor with respect to a predictive relationship between in vivo and in vitro sensitivities; receiving sensor data from the glucose sensor by the sensor electronics after the glucose sensor is implanted in the host, wherein the sensor data is representative of a glucose concentration in the host; and calibrating, using a processor operably connected to the sensor electronics, the sensor data received from the glucose sensor, wherein the calibrating is performed based at least in part on the received information associated with the a priori sensitivity without reliance on reference glucose values obtained from a self-monitoring blood glucose test after implantation of the glucose sensor in the host. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for calibrating signals received from an implanted glucose sensor, the system comprising:
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a glucose sensor configured for transcutaneous implantation in a host, the glucose sensor comprising a membrane system and configured to generate sensor data representative of a glucose concentration in the host after implantation; sensor electronics configured for attachment to the host and configured to be operably connected to the glucose sensor; a processor configured to be operably connected to the sensor electronics; memory configured to be operably connected to the processor, wherein the memory has stored therein information associated with a priori sensitivity, wherein the information associated with the a priori sensitivity is derived at least in part from an analysis of glucose sensor sensitivities collected from a set of glucose sensors that are representative of the glucose sensor with respect to a predictive relationship between in vivo and in vitro sensitivities; and wherein the processor is configured to calibrate the glucose sensor based at least in part on the stored information associated with the a priori sensitivity without reliance on reference glucose values obtained from a self-monitoring blood glucose test after implantation of the glucose sensor in the host. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification