Patent ID: 7981363
Filing Date: 2011-07-19
Classification: G01N,Y10T

Abstract:
1. An apparatus for determining the concentration of a medically significant component of a biological fluid, the apparatus comprising: a cell for receiving a sample of the fluid, the cell supporting: a chemistry which reacts with the medically significant component; and first and second terminals across which the reaction of the chemistry with the medically significant component can be assessed; wherein at least a portion of said chemistry is in contact with said first and second terminals; an instrument having: first and second terminals complementary to the first and second terminals, respectively, of the cell; wherein placement of the first and second terminals of the cell in contact with the first and second terminals, respectively, of the instrument permits the instrument to assess the reaction; and an assessment controller for: applying across the first and second terminals of the instrument a first signal; determining a first correction value in response of the cell to the first signal, wherein the determining a first correction value step comprises: assessing the reaction of the medically significant component with the chemistry; and combining the correction value with the result of the reaction assessment to produce an indication of the concentration of the medically significant component of the sample; wherein the first signal comprises a signal having an AC component.