Underfill Detection System For A Biosensor
First Claim
1. A method for detecting an underfill condition in a biosensor, comprising:
- applying a test excitation signal to a sample of a biological fluid;
switching the test excitation signal to at least one different amplitude;
measuring a test output signal from the sample; and
comparing the test output signal with at least one underfill threshold.
2 Assignments
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Accused Products
Abstract
A biosensor has an underfill detection system that determines whether a sample of a biological fluid is large enough for an analysis of one or more analytes. The underfill detection system applies an excitation signal to the sample, which generates an output signal in response to the excitation signal. The underfill detection system switches the amplitude of the excitation signal. The transition of the excitation signal to a different amplitude changes the output signal when the sample is not large enough for an accurate and/or precise analysis. The underfill detection system measures and compares the output signal with one or more underfill thresholds to determine whether an underfill condition exists.
43 Citations
34 Claims
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1. A method for detecting an underfill condition in a biosensor, comprising:
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applying a test excitation signal to a sample of a biological fluid; switching the test excitation signal to at least one different amplitude; measuring a test output signal from the sample; and comparing the test output signal with at least one underfill threshold. - 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 detecting an underfill condition in a biosensor, comprising:
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applying a polling excitation signal to a sample of a biological fluid; applying a test excitation signal to the sample when a polling output signal from the sample is equal to or greater than a polling threshold; switching the test excitation signal to at least one different amplitude; measuring a test output signal from the sample; comparing the test output signal with at least one underfill threshold; and generating an error signal.
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18-30. -30. (canceled)
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31. A biosensor for determining an analyte concentration in a biological fluid, comprising:
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a sensor strip having a sample interface on a base, where the sample interface is adjacent to a reservoir formed by the base; a measuring device having a processor connected to a sensor interface, where the sensor interface has electrical communication with the sample interface; and where the processor applies a test excitation signal to the sample interface, where the processor switches the test excitation signal to at least one different amplitude, where the processor measures a test output signal from the sample interface, and where the processor compares the test output signal to at least one underfill threshold. - View Dependent Claims (32, 33)
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34-45. -45. (canceled)
Specification