System and method for factory calibration or reduced calibration of an indwelling sensor based on sensitivity profile and baseline model of sensors
AssigneeDexCom, Inc.
InventorsRui Ma, Naresh C. Bhavaraju, Thomas Stuart Hamilton, Jonathan Hughes, Jeff Jackson, David I-Chun Lee, Peter C. Simpson, Stephen J. Vanslyke
Life of this patent
Estimating the term…
Abstract
Systems and methods are disclosed which provide for a “factory-calibrated” sensor. In doing so, the systems and methods include predictive prospective modeling of sensor behavior, and also include predictive modeling of physiology. With these two correction factors, a consistent determination of sensitivity can be achieved, thus achieving factory calibration.
Claims7
A system for providing calibrated sensors, wherein a lot of a given type of sensor has been manufactured, in which one or more operating parameters of the type of sensor of the lot have been determined, the determining of the operating parameters based on retrospective data, the operating parameters corresponding to at least a statistical representation of a sensitivity of sensors of the lot, the operating parameters representing in vivo values, the system comprising:
- a first device for manufacturing a lot of analyte concentration sensors,
- a second device for prospectively determining a calibration of a subject sensor from the lot, wherein the second device is configured to perform the steps of:
- measuring one or more long term drift characteristics of sensitivity of a subset of sensors in the manufactured lot;
- for a subject sensor, measuring a value of an initial measurable parameter;
- correlating the measured value of the initial measurable parameter of the subject sensor to the measured one or more long term drift characteristics using a first set of coefficients;
- correlating at least a subset of the one or more determined operating parameters to the measured value of the initial measurable parameter via a second set of coefficients;
- and
- using the first and second set of coefficients to determine an estimated prospective value of at least an in vivo final sensitivity of the subject sensor, wherein, given a measured value of the initial measurable parameter of the subject sensor, an in vivo sensitivity value for the subject sensor is calculated.
Dependencies are inferred from the claim text.