SYSTEMS AND METHODS OF DISCRIMINATING BETWEEN A CONTROL SAMPLE AND A TEST FLUID USING CAPACITANCE

摘要

Methods for distinguishing between an aqueous non-blood sample (e.g., a control solution) and a blood sample are provided herein. In one aspect, the method includes using a test strip in which multiple current transients are measured by a meter electrically connected to an electrochemical test strip. The current transients are used to determine if a sample is a blood sample or an aqueous non-blood sample based on characteristics of the sample (e.g., amount of interferent present, reaction kinetics, and/or capacitance). The method can also include calculating a discrimination criteria based upon these characteristics. Various aspects of a system for distinguishing between a blood sample and an aqueous non-blood sample are also provided herein.

主权项

1. A method for distinguishing between a blood sample and an aqueous non-blood sample, the method comprising:
(a) introducing a sample into an electrochemical cell, the electrochemical cell comprising:
(i) two electrodes in a spaced apart relationship; and(ii) a reagent; (b) applying a first test potential, having a first polarity, between the electrodes, and measuring cell current; (c) measuring a capacitance of the electrochemical cell; (d) summing at least two current values measured during the first test potential to generate a first reference value,; (e) calculating a capacitance index related to the measured capacitance; (f) using the capacitance index and the first reference value to distinguish between a blood sample and an aqueous non-blood sample.