Biological information measurement device and biological information measurement method using same

• US 10,107,777 B2
• Filed: 06/29/2016
• Issued: 10/23/2018
• Est. Priority Date: 06/06/2012
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: PHC Holdings Corporation
• Inventors: Yoshioka, Eriko
• Primary Examiner(s): Kessel, Maris R
• Application Number:
  US15/197,019
• Publication Number:
  US 20170023517A1
• Time in Patent Office: 846 Days
• CPC Class Codes: G01N 27/327 Biochemical electrodes , e.g. electrical or mechanical details for in vitro measurements
• CPC Class Codes: G01N 27/3274 Corrective measures, e.g. error detection, compensation for temperature or hematocrit, calibration coding of calibration information G01N33/48771

Abstract

In a biological information measurement device for measuring, for example, a blood glucose level, it is intended to improve measurement accuracy. In a voltage sweep mode A (a biological information characteristic detection mode), different voltage values are applied between a first input terminal and a second input terminal from a voltage applying unit 15 in a first period and a second period, a plurality of various factors that affect variation in the measurement of biological information are considered as changes in the current value in the voltage sweep mode A (the biological information characteristic detection mode), thereby a biological information correction value is calculated from the changes in the current value, and the biological information measurement value measured during the biological information measurement mode C is corrected by the biological information correction value. Thus, the measurement accuracy can be improved.

Claims

1. A biological information measurement method using a biological information measurement device, to which a biosensor is attached, the biosensor having a first electrode, a second electrode, and a reagent portion provided between the first electrode and the second electrode,

wherein the biological information measurement device comprises:

a first input terminal, to which the first electrode is connected;

a second input terminal, to which the second electrode is connected;

a voltage applying unit for applying a voltage to the first input terminal and the second input terminal; and

a control unit connected to the voltage applying unit, the first input terminal, and the second input terminal,

the control unit is configured to execute a biological information characteristic detection mode and a biological information measurement mode following the biological information characteristic detection mode,

during the biological information characteristic detection mode, with respect to the voltage applying unit, the control unit is configured to apply voltage values between the first input terminal and the second input terminal from the voltage applying unit in a first period and a second period of the biological information characteristic detection mode with the voltage being swept and is configured to detect currents flowing between the first input terminal and the second input terminal in the first period and the second period by the control unit,

the control unit is configured to calculate a biological information correction value from the currents flowing between the first input terminal and the second input terminal in the first period and the second period by the control unit, and

the control unit is configured to correct a biological information measurement value by the biological information correction value, the biological information measurement value being measured during the biological information measurement mode by the control unit,

the method comprising steps of;

with the biosensor being attached, in the biological information characteristic detection mode, applying the voltage to the first input terminal and the second input terminal with the voltage applying unit;

calculating the biological information correction value from a current flowing between the first input terminal and the second input terminal; and

correcting a biological information measurement value measured during the biological information measurement mode by the biological information correction value.