Micropressors, devices and methods for use in analyte monitoring systems

  • US 20060063218A1
  • Filed: 11/09/2005
  • Published: 03/23/2006
  • Est. Priority Date: 03/22/2002
  • Status: Active Grant
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First Claim
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1. One or more microprocessors, comprising programming to control:

  • selecting a current integration method for an analyte-related current signal, wherein (i) said analyte-related current signal comprises data points, (ii) an electrode system comprising two or more electrode sets is used for detecting said analyte-related current signal, each electrode set comprises an iontophoretic electrode and an electrochemical sensor element, wherein each of the two iontophoretic electrodes alternately function as cathode and anode, (iii) a current signal, comprising data points, is detected in a half-measurement cycle at each of the anode and the cathode, and (iv) the analyte-related current signal is obtained from the sensor element associated with the cathode;

    determining a background baseline for a given sensor when associated with the cathode based on the last two data points of the current signal detected for the same sensor in a previous half-cycle when the sensor was associated with the anode; and

    subtracting the background baseline from the analyte-related current signal and if over-subtraction of the analyte-related current signal occurs, employing one of the following integration methods to determine an analyte-related charge signal based on the analyte-related current signal;

    (i) stopping integration when the maximum integral is reached and using the maximum integral as the analyte-related charge signal;

    or (ii) recalculating a background baseline based on the last two data points from the analyte-related current signal at the cathode;

    subtracting the recalculated background baseline from the analyte-related current signal, and integrating the background subtracted analyte-related current signal to obtain the analyte-related charge signal.

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