Underfill detection system for an electrochemical biosensor

G - Physics – 01 – N

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G01N 27/30 (2006.01) G01N 33/487 (2006.01)

Patent

CA 2649644

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.

Biocapteur doté d'un système de détection de remplissage insuffisant déterminant si un échantillon d'un fluide biologique est présent en quantité suffisante pour permettre l'analyse d'un ou de plusieurs analytes. Le système de détection de remplissage insuffisant applique un signal d'excitation à l'échantillon, lequel réagit en générant un signal de sortie. Le système de détection de remplissage insuffisant modifie l'amplitude du signal d'excitation. La modification de l'amplitude du signal d'excitation occasionne une variation du signal de sortie si l'échantillon n'est pas présent en quantité suffisante pour permettre une analyse juste et/ou précise. Le système de détection de remplissage insuffisant mesure et compare le signal de sortie à un ou plusieurs seuils de remplissage insuffisant pour identifier un état de remplissage insuffisant.

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