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, during at least one of a start of the test excitation signal, a test pulse, and a transition from one test pulse to another test pulse;
measuring a test output signal responsive to a redox reaction of the sample; and
comparing the test output signal with at least one underfill threshold; and
detecting an underfill condition in the biosensor from the comparison of the test output signal with the at least one underfill threshold.
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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.
30 Citations
15 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, during at least one of a start of the test excitation signal, a test pulse, and a transition from one test pulse to another test pulse; measuring a test output signal responsive to a redox reaction of the sample; and comparing the test output signal with at least one underfill threshold; and detecting an underfill condition in the biosensor from the comparison of the test output signal with the at least one underfill threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification