Method of measuring blood component, sensor used in the method, and measuring device

Abstract

The present invention provides a method of measuring a component in blood, by which an amount of the component can be corrected accurately by measuring a hematocrit (Hct) value of the blood with high accuracy and high reliability and also provides a sensor used in the method. The method of measuring a component in blood using a biosensor comprising a first electrode system including a first working electrode on which at least an oxidoreductase that acts upon the component and a mediator are provided and a first counter electrode and a second working electrode on which the mediator is not provided. The first working electrode and the first counter electrode are used for obtaining the amount of the component and the second working electrode and the first working electrode are used for obtaining the amount of the blood cells.

1 - 43 . (canceled) 
     
     
         44 . A biosensor comprising
 a mediator,   an oxidoreductase, a substrate of which being a blood component,   a channel extending linearly in I shape for drawing the blood, and   a first electrode and a second electrode provided inside the channel,   the electrodes being made from precious metal including gold or palladium,   wherein the distance between the first and second electrodes is at least 0.05 mm,   the mediator and the oxidoreductase are provided on the first electrode and provided so as to extend to the width of the channel,   the mediator is not provided on the second electrode, and   the overall length of the channel is 1 to 5 mm and the width of the channel is 0.2 to 3 mm.   
     
     
         45 . The biosensor according to  claim 44 , wherein the oxidoreductase is glucose dehydrogenase. 
     
     
         46 . The biosensor according to  claim 44 , the first and second electrodes can be switched between a working and counter electrodes.