Patent ID: 7955492

Claim:
A method of measuring a component in blood, comprising the steps of: measuring a component in blood by causing a redox reaction between the component and an oxidoreductase in the presence of a mediator, detecting a redox current caused by the redox reaction with a first electrode system comprising a working electrode and a counter electrode, and converting a value of the detected current into an amount of the component; correcting the amount of the component using an amount of blood cells contained in the blood; and correcting the amount of the component using an amount of an interfering substance contained in the blood, wherein the correction step using the amount of the blood cells comprises: supplying the blood to a second electrode system comprising a working electrode and a counter electrode, a mediator being present on the counter electrode of the second electrode system but not on the working electrode of the second electrode system; applying a voltage to the second electrode system in this state to cause a redox current to flow through the second electrode system; detecting the redox current flowing through the second electrode system; converting a value of the detected redox current flowing through the second electrode system into the amount of the blood cells; and correcting the amount of the component based on the amount of the blood cells, and the correction step using the amount of the interfering substance comprises: supplying the blood to a third electrode system comprising a working electrode and a counter electrode; applying a voltage to the third electrode system in this state to cause a redox current to flow through the third electrode system; detecting the redox current flowing through the third electrode system; converting a value of the detected redox current flowing through the third electrode system into the amount of the interfering substance; and correcting the amount of the component based on the amount of the interfering substance.