Patent ID: 7003341

Claim:
A method of calibrating an electrochemical sensor implanted in a patient and comprising one or more working electrodes, the method comprising: (a) generating a signal from each of the one or more working electrodes; (b) determining if each of conditions (1) to (3) are met (1) the signal from each of the one or more working electrodes differ by less than a first threshold amount, (2) the signals from each of the one or more working electrodes are within a predetermined range, and (3) a rate of change of the signals from each of the one or more working electrodes is less than a second threshold amount, (c) determining a calibration value by assaying a calibration sample of a patient's body fluid; and (d) relating the calibration value to at least one of the signals from the one or more working electrodes if the conditions in step (b) are met.