Underfill recognition biosensor
First Claim
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1. A biosensor with an underfill recognition system for assessing sufficiency of a volume of a sample in the biosensor, the biosensor comprising:
- 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 sensor interface with a signal generator, and where the sensor interface has electrical communication with the sample interface; and
a processor connected to the sensor interface and programmed to;
direct the signal generator to apply a regular polling sequence to a sample contacting the working electrode and the counter electrode, the regular polling sequence substantially eliminating irreversible alteration of the concentration of at least one analyte in the sample during the application of the regular polling sequence,detect when at least one regular output pulse reaches at least one sample threshold,direct the signal generator to apply an extended polling sequence to the sample, the extended polling sequence substantially eliminating irreversible alteration of the concentration of the at least one analyte in the sample during the application of the extended polling sequence,detect when at least one different extended output pulse reaches at least one volume threshold,indicate when a sample volume is insufficient for analysis of the at least one analyte in the sample, anddirect the signal generator to apply a test excitation signal to the sample when the sample volume is sufficient for the analysis of the at least one analyte in the sample, the test excitation signal irreversibly altering the concentration of the at least one analyte in the sample during the application of the test excitation signal.
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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.
30 Citations
13 Claims
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1. A biosensor with an underfill recognition system for assessing sufficiency of a volume of a sample in the biosensor, the biosensor 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 sensor interface with a signal generator, and where the sensor interface has electrical communication with the sample interface; and a processor connected to the sensor interface and programmed to; direct the signal generator to apply a regular polling sequence to a sample contacting the working electrode and the counter electrode, the regular polling sequence substantially eliminating irreversible alteration of the concentration of at least one analyte in the sample during the application of the regular polling sequence, detect when at least one regular output pulse reaches at least one sample threshold, direct the signal generator to apply an extended polling sequence to the sample, the extended polling sequence substantially eliminating irreversible alteration of the concentration of the at least one analyte in the sample during the application of the extended polling sequence, detect when at least one different extended output pulse reaches at least one volume threshold, indicate when a sample volume is insufficient for analysis of the at least one analyte in the sample, and direct the signal generator to apply a test excitation signal to the sample when the sample volume is sufficient for the analysis of the at least one analyte in the sample, the test excitation signal irreversibly altering the concentration of the at least one analyte in the sample during the application of the test excitation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification