Method of measuring hematocrit (hct), sensor used in the method, and measuring device
First Claim
1. A method of electrochemically measuring a hematocrit (Hct) value of blood, comprising:
- supplying blood to an the electrode system having a working electrode and a counter electrode, a redox substance being provided on the counter electrode but not on the working electrode;
applying a voltage to the electrode system in this state to cause an oxidation current or a reduction current to flow between the electrodes;
detecting the oxidation current or the reduction current; and
determining a Hct value of the blood based on a value of the detected current.
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Abstract
The present invention provides a method of electrochemically measuring a hematocrit (Hct) value using a sensor, capable of achieving excellent measurement accuracy and reliability and also provides a sensor used in the method. The method of electrochemically measuring a hematocrit (Hct) value of blood include: providing an electrode system having a working electrode (11) and a counter electrode (12), in which a redox substance is provided on the counter electrode (12) but not on the working electrode (11); supplying blood to the electrode system; applying a voltage to the electrode system in this state to cause an oxidation current or a reduction current to flow between the working electrode (11) and the counter electrode (12); detecting the oxidation current or the reduction current; and determining a Hct value based on a value of the detected current.
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Citations
31 Claims
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1. A method of electrochemically measuring a hematocrit (Hct) value of blood, comprising:
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supplying blood to an the electrode system having a working electrode and a counter electrode, a redox substance being provided on the counter electrode but not on the working electrode;
applying a voltage to the electrode system in this state to cause an oxidation current or a reduction current to flow between the electrodes;
detecting the oxidation current or the reduction current; and
determining a Hct value of the blood based on a value of the detected current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A sensor for electrochemically measuring a hematocrit (Hct) value of blood, the sensor comprising:
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an electrode system having a working electrode and a counter electrode, a redox substance being provided on the counter electrode but not on the working electrode, wherein blood is supplied to the electrode system, a voltage is applied to the electrode system in this state to cause an oxidation current or a reduction current to flow between the electrodes, and a value of the oxidation current or the reduction current is detected. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A measuring device for measuring a Hct value, comprising:
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holding means for holding a sensor;
application means for applying a constant voltage to the electrode system of the sensor; and
detection means for detecting the oxidation current or the reduction current flowing through the electrode system of the sensor, the sensor being a sensor for electrochemically measuring a hematocrit (Hct) value of blood, comprising;
an electrode system having a working electrode and a counter electrode, a redox substance being provided on the counter electrode but not on the working electrode wherein blood is supplied to the electrode system, a voltage is applied to the electrode system in this state to cause an oxidation current or a reduction current to flow between the electrodes, and a value of the oxidation current or the reduction current is detected. - View Dependent Claims (31)
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Specification