Determining Analyte Concentration From Variant Concentration Distribution In Measurable Species

摘要

A biosensor system determines an analyte concentration of a biological sample using an electrochemical process without Cottrell decay. The biosensor system generates an output signal having a transient decay, where the output signal is not inversely proportional to the square root of the time. The transient decay is greater or less than the −0.5 decay constant of a Cottrell decay. The transient decay may result from a relatively short incubation period, relatively small sample reservoir volumes, relatively small distances between electrode surfaces and the lid of the sensor strip, and/or relatively short excitations in relation to the average initial thickness of the reagent layer. The biosensor system determines the analyte concentration from the output signal having a transient decay.

主权项

1. A method for determining an analyte concentration in a sample, comprising:
forming a measurable species from reacting an analyte in the sample with an ionizing agent; applying an input signal to the sample after an incubation period not exceeding 12 seconds, the input signal including an excitation and a relaxation; responsive to applying the excitation, measuring an output signal while the measurable species reflects a variant concentration distribution; and determining the analyte concentration of the sample based on the measured output signal.