Underfill Recognition System for a Biosensor
First Claim
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1. A method for assessing the volume of a sample in a biosensor, comprising:
- applying a regular polling sequence;
detecting the presence of a sample;
applying an extended polling sequence having at least one different extended input pulse; and
detecting whether a sample volume is sufficient for analysis of at least one analyte in the sample.
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Abstract
A biosensor with an underfill recognition system assesses whether to analyze a sample for one or more analytes in response to the volume of the sample. The underfill recognition system applies polling and test excitation signals to the sample. The polling signals generate one or more polling output signals, which maybe used to detect when a sample is present and to determine whether the sample has sufficient volume for analysis. The test excitation signal generates one or more test output signals, which may be used to determine one or more analyte concentrations in the sample.
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Citations
31 Claims
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1. A method for assessing the volume of a sample in a biosensor, comprising:
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applying a regular polling sequence; detecting the presence of a sample; applying an extended polling sequence having at least one different extended input pulse; and detecting whether a sample volume is sufficient for analysis of at least one analyte in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for assessing the volume of a sample in a biosensor, comprising:
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applying a regular polling sequence; detecting when at least one regular output pulse reaches at least one sample threshold; applying an extended polling sequence; detecting when at least one different extended output pulse reaches at least one volume threshold; indicating when a sample volume is insufficient for analysis of at least one analyte in the sample; and applying a test excitation signal when the sample volume is sufficient for analysis of at least one analyte in the sample. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A biosensor with an underfill recognition system, comprising:
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a sensor strip having a sample interface on a base, where the sample interface is in electrical communication with a working electrode and a counter electrode, the working and counter electrodes positioned in a reservoir formed by the base; and a measuring device having a processor connected to a sensor interface, where the sensor interface has a signal generator, and where the sensor interface has electrical communication with the sample interface; and where the processor directs the signal generator to apply a regular polling sequence, where the processor detects the presence of a sample, where the processor directs the signal generator to apply an extended polling sequence, where the processor detects whether a sample volume is sufficient for analysis of at least one analyte in the sample, where the processor directs the signal generator to apply a test excitation signal when a sample volume is sufficient for analysis of at least one analyte in the sample, and where the processor determines the concentration of at least one analyte in a sample in response to a test output signal.
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31-47. -47. (canceled)
Specification