Method and apparatus for detection of abnormal traces during electrochemical analyte detection
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United States of America Patent
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Mar 18, 2008
Grant Date -
Oct 19, 2006
app pub date -
Apr 15, 2005
filing date -
Apr 15, 2005
priority date (Note) -
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Abstract
Detection of abnormal signal traces in electrochemical measurements generated using an electrochemical test strip to which a potential is applied allows for an indication of an erroneous analyte determination. The current trace has an expected shape in which a peak current is observed a time t.sub.peak after which there is a decrease in current. To detect abnormal signal traces, the time t.sub.peak is determined experimentally and compared with an expected value, t'.sub.peak, and if the difference between the two values to over a predetermined threshold, an error message is provided to the user instead of a test result. The value of t'.sub.peak is determined as a function of a mobility term that is determined during a potentiometry phase following the amperometric measurements.
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