Patent ID: 9157110
Filing Date: 2015-10-13
Classification: C12Q,G01N

Abstract:
1. A system for distinguishing between a blood sample and a control solution, the system comprising: (a) a test strip including electrical contacts for mating with a test meter and an electrochemical cell comprising; (b) a test meter including a processor programmed to measure and receive current data from the test strip, and data storage containing discrimination criteria for distinguishing a blood sample from a control solution, wherein the discrimination criteria is derived from an interferent index that is representative of antioxidant concentration and a residual reaction index that is representative of reaction kinetics between the reagent and an introduced liquid, in which the processor is programmed to calculate the interferent index based on a summation of current values measured during a first current transient and to determine the residual reaction index by calculating an absolute ratio involving current values obtained during second and third current transients, wherein the interferent index represents a first reference value and the residual reaction index represents a second reference value and in which the processor is further programmed to distinguish a blood sample from a control solution by comparing the calculated second reference value to a pre-determined threshold function based on the interferent index.