Methods for measuring physiological fluids
First Claim
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1. A testing meter for electrochemically measuring the concentration of an analyte in a physiological fluid sample, the testing meter comprising:
- a processor;
an electrochemical measurement device that can be electrically connected to a test device comprising a fluid application portion having at least a pair of electrodes and a reagent so that the electrochemical measurement device can provide a potential and measure current flow across the at least a pair of electrodes when a test device is electrically connected to the electrochemical measurement device; and
memory comprising programming that causes the electrochemical meter, when a test device is electrically connected thereto, to apply a constant voltage over a first predetermined time period and measure a current at the least a pair of electrodes and use the magnitude of the current at the end of the first predetermined time period as a test reading indicative of the concentration of an analyte in a physiological fluid present in the test fluid application area of the test device if the magnitude of the current remains above a threshold current value for a second predetermined time period wherein the second time period comprises an initial portion of the first time period.
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Abstract
Electrochemical measurement techniques for measuring the concentration of an analyte in a physiological fluid sample are described. More particularly, the present invention relates to techniques for distinguishing a signal caused by an extraneous event from a desired information providing signal such as one indicative of a measurement error.
26 Citations
3 Claims
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1. A testing meter for electrochemically measuring the concentration of an analyte in a physiological fluid sample, the testing meter comprising:
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a processor; an electrochemical measurement device that can be electrically connected to a test device comprising a fluid application portion having at least a pair of electrodes and a reagent so that the electrochemical measurement device can provide a potential and measure current flow across the at least a pair of electrodes when a test device is electrically connected to the electrochemical measurement device; and memory comprising programming that causes the electrochemical meter, when a test device is electrically connected thereto, to apply a constant voltage over a first predetermined time period and measure a current at the least a pair of electrodes and use the magnitude of the current at the end of the first predetermined time period as a test reading indicative of the concentration of an analyte in a physiological fluid present in the test fluid application area of the test device if the magnitude of the current remains above a threshold current value for a second predetermined time period wherein the second time period comprises an initial portion of the first time period. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeCilag Gmbh International (Johnson & Johnson)
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Original AssigneeLifescan Incorporated (Duv Holding Corporation)
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InventorsRoberts, Neil, Smeaton, Gary
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Primary Examiner(s)Noguerola, Alex
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Assistant Examiner(s)Kaur, Gurpreet
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Application NumberUS13/076,413Publication NumberTime in Patent Office839 DaysField of Search204/400, 204/401, 204/403.1, 204/403.04, 204/403.11, 204/406, 205/775, 205/779, 436/95, 436/149, 436/150, 436/14, 422/82.01, 422/82.02US Class Current204/403.01CPC Class CodesG01N 27/3274 Corrective measures, e.g. e...
