Liquid sample measurement method and apparatus

• US 8,287,704 B2
• Filed: 01/13/2012
• Issued: 10/16/2012
• Est. Priority Date: 07/05/2006
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Shinno, Teppei, Takahara, Yoshifumi
• Primary Examiner(s): Olsen, Kaj K
• Assistant Examiner(s): CARLSON, KOURTNEY SALZMAN
• Application Number:
  US13/349,729
• Publication Number:
  US 20120103806A1
• Time in Patent Office: 277 Days
• Field of Search: 20440301-40315, 204/406, 205/777.5, 205/778, 205/792, 600345-348
• US Class Current: 204/406
• CPC Class Codes: C12Q 1/54 involving glucose or galactose
• CPC Class Codes: G01N 27/3274 Corrective measures, e.g. error detection, compensation for temperature or hematocrit, calibration coding of calibration information G01N33/48771
• CPC Class Codes: G01N 33/5438 Electrodes
• CPC Class Codes: G01N 33/54393 Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding

Abstract

A liquid sample measurement apparatus of the present invention is provided with a timer for measuring the time from when a biosensor is attached to a liquid sample measurement device which measures the concentration of a specific component in a liquid sample that is applied to the biosensor to when the liquid sample is applied to the biosensor, and correction based on the time measured by the timer is performed to the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor. Thereby, the measurement precision can be enhanced with utilizing the correction algorithm in which the ambient temperature and the temperature of the biosensor itself are considered.

Claims

1. A liquid sample measurement apparatus having a biosensor attached thereto, which measures the concentration of a specific component in a liquid sample that is applied to the biosensor, the liquid sample measurement apparatus including:

a time measurement means for measuring the time from when the biosensor is attached to when the liquid sample is applied to the biosensor; and

a measurement result correction means for correcting the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, on the basis of the time measured by the time measurement means.

2. A liquid sample measurement apparatus as defined in claim 1, wherein

said measurement result correction means changes the amount of correction for the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, according to the time measured by the time measurement means.

3. A liquid sample measurement apparatus as defined in claim 2, wherein

said measurement result correction means reduces the amount of correction when the time measured by the time measurement means is long.

4. A liquid sample measurement apparatus as defined in claim 1, wherein

said measurement result correction means judges whether correction should be performed or not for the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, according to the time measured by the time measurement means.

5. A liquid sample measurement apparatus as defined in claim 4, wherein

said measurement result correction means performs the correction when the time measured by the time measurement means is within a specific time.

6. A liquid sample measurement apparatus as defined in claim 1, wherein

said measurement result correction means determines the amount of correction for the measurement result according to the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor.

7. A liquid sample measurement apparatus as defined in claim 1 further including

a temperature measurement part for measuring the ambient temperature at the measurement, and

wherein said measurement result correction means determines the amount of correction for the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, according to the ambient temperature measured by the temperature measurement part.

8. A liquid sample measurement apparatus as defined in claim 1, wherein

said measurement result correction means determines the amount of correction for the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, according to a second specific component which exists in the liquid sample and is different than the specific component.

9. A liquid sample measurement apparatus as defined in claim 8, wherein

the liquid sample is blood, and

the second specific component is the hematocrit value of the blood.

10. A liquid sample measurement apparatus as defined in claim 1, wherein

said measurement result correction means determines the amount of correction for the measurement result according to the type of the liquid sample that is applied to the biosensor.

11. A liquid sample measurement apparatus having a biosensor attached thereto, which measures the concentration of a specific component in a liquid sample that is applied to the biosensor, the liquid sample measurement apparatus including:

a time measurement means for measuring the time from when the biosensor is attached to when the liquid sample is applied to the biosensor;

a temperature sensor for measuring the ambient temperature at measurement;

a temperature correction means for correcting the ambient temperature measured by the temperature sensor, on the basis of the time measured by the time measurement means; and

a measurement result correction means for performing correction for the measurement result of the concentration of the specific component in the liquid sample that is applied to the biosensor, on the basis of the corrected ambient temperature.