System and method of processing a current sample for calculating a glucose concentration
First Claim
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1. A method of determining analyte concentration in a physiological fluid, comprising:
- receiving, by a test meter, a sample of physiological fluid;
causing a current to run through the fluid sample;
sampling the magnitude of the current a plurality of times to form a plurality of analog to digital (A/D) conversions;
discarding a subset of the plurality of A/D conversion, based on the magnitudes;
generating an analyte concentration based on the remaining A/D conversions;
determining a maximum current peak time;
determining a change in current after the maximum current peak time during a time interval; and
selectively indicating an error based on the change in current.
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Abstract
A system and method of processing a test current for an analyte measurement in a fluid using a test strip and a test meter are disclosed. The method comprises sampling the test current at a pre-determined sampling rate to acquire a plurality of A/D conversions. The method also comprises filtering out at least a highest magnitude A/D conversion and a lowest magnitude A/D conversion leaving a plurality of accepted A/D conversions. Further, the method comprises calculating an average or a summation of the plurality of accepted A/D conversions and converting the average or the summation into a glucose concentration.
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Citations
11 Claims
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1. A method of determining analyte concentration in a physiological fluid, comprising:
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receiving, by a test meter, a sample of physiological fluid; causing a current to run through the fluid sample; sampling the magnitude of the current a plurality of times to form a plurality of analog to digital (A/D) conversions; discarding a subset of the plurality of A/D conversion, based on the magnitudes; generating an analyte concentration based on the remaining A/D conversions; determining a maximum current peak time; determining a change in current after the maximum current peak time during a time interval; and selectively indicating an error based on the change in current. - View Dependent Claims (9, 10, 11)
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2. A method of determining analyte concentration in a physiological fluid, comprising:
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receiving, by a test meter, a sample of physiological fluid; causing a current to run through the fluid sample; sampling the magnitude of the current a plurality of times to form a plurality of analog to digital (A/D) conversions; discarding a subset of the plurality of A/D conversion, based on the magnitudes; and generating an analyte concentration based on the remaining A/D conversions, wherein a first subset of the plurality of A/D conversions is sampled from a first pair of electrodes and a second subset of the plurality of A/D conversions is sampled from a second pair of electrodes.
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3. A method to determine analyte concentration in a fluid sample in contact with two electrodes, the method comprising:
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applying a voltage to the electrodes; sampling the magnitude of current generated in the fluid sample to provide a plurality of analog-to-digital conversions; discarding a subset of the plurality of analog-to-digatal conversions; generating an analyte concentration based on remaining analog-to digital conversions; determining a maximum current peak time; determining a change in current after the maximum current peak time during a time interval; and selectively indicating an error based on the change in current. - View Dependent Claims (4, 5, 6, 7)
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8. A method to determine analyte concentration in a fluid sample in contact with two electrodes, the method comprising:
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applying a voltage to the electrodes; sampling the magnitude of current generated in the fluid sample to provide a plurality of analog-to-digital conversions; discarding a subset of the plurality of analog-to-digital conversions; generating an analyte concentration based on remaining analog-to-digital conversion, wherein a first subset of the plurality of A/D conversions is sampled from a first pair of electrodes and a second subset of the plurality of A/D conversions is sampled from a second pair of electrodes.
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Specification