Electrochemical biosensor with improved accuracy
First Claim
1. An electrochemical biosensor, comprising:
- a lower substrate;
a first electrode part comprising a first working electrode and a first auxiliary electrode which are formed on the lower substrate;
a second electrode part comprising a second working electrode and a second auxiliary electrode which are formed on the lower substrate;
a reagent layer formed on the second working electrode or the second auxiliary electrode, the reagent layer including an electron transfer mediator;
an insulation cover having regions which correspond to first, second and third reaction units and are partitioned to have cavities, respectively, wherein the first reaction unit is positioned at the first working electrode, a second reaction unit is positioned at the first auxiliary electrode, and a third reaction unit is positioned at the second working electrode;
an intermediate substrate equipped with a microchannel sample cell part to successively guide a blood sample into the first electrode part and the second electrode part; and
an upper substrate,wherein the first electrode part is able to be electrically connected to a measuring device used in calculating hematocrit by measuring conductivity of a blood sample at the first electrode part, and wherein the first working electrode is devoid of a reagent layer thereon, andwherein the first reaction unit positioned at the first working electrode and the second reaction unit positioned at the first auxiliary electrode are each positioned, at least in part, on an imaginary line perpendicular to a longitudinal direction along which blood flows into the microchannel sample cell part.
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Abstract
The present invention relates to an electrochemical biosensor with improved hematocrit measurement accuracy for measuring blood glucose. According to the present invention, an electrochemical biosensor including a first electrode part for correcting a measured hematocrit value and a second electrode part for measuring a glucose concentration is effective in improving accuracy of a measured hematocrit value and in more improving accuracy of a measured blood glucose concentration using the measured hematocrit values for correction, because an insulation cover is made thinner than a working electrode and an auxiliary electrode, so that areas of a first working electrode and a first auxiliary electrode of the first electrode part exposed to a blood sample become equal; a distance between the first working electrode and the second working electrode becomes constant; and electrode areas are maintained constantly by the insulation cover even when a positioning error occurs during printing.
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Citations
14 Claims
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1. An electrochemical biosensor, comprising:
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a lower substrate; a first electrode part comprising a first working electrode and a first auxiliary electrode which are formed on the lower substrate; a second electrode part comprising a second working electrode and a second auxiliary electrode which are formed on the lower substrate; a reagent layer formed on the second working electrode or the second auxiliary electrode, the reagent layer including an electron transfer mediator; an insulation cover having regions which correspond to first, second and third reaction units and are partitioned to have cavities, respectively, wherein the first reaction unit is positioned at the first working electrode, a second reaction unit is positioned at the first auxiliary electrode, and a third reaction unit is positioned at the second working electrode; an intermediate substrate equipped with a microchannel sample cell part to successively guide a blood sample into the first electrode part and the second electrode part; and an upper substrate, wherein the first electrode part is able to be electrically connected to a measuring device used in calculating hematocrit by measuring conductivity of a blood sample at the first electrode part, and wherein the first working electrode is devoid of a reagent layer thereon, and wherein the first reaction unit positioned at the first working electrode and the second reaction unit positioned at the first auxiliary electrode are each positioned, at least in part, on an imaginary line perpendicular to a longitudinal direction along which blood flows into the microchannel sample cell part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification