Blood component concentration measurement device

Patent metadata

Field	Value
Publication number	US-12533057-B2
Application number	US-202017771725-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 8, 2019
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

The present invention is provided with a four-wavelength light emitter that emits four kinds of wavelengths of light toward a predetermined site on a living body; a light receiver that receives the four kinds of wavelengths of light transmitted through the predetermined site on the living body; a received light intensity information acquirer that acquires received light intensity information for the four wavelengths on the basis of an optical signal received by the light receiver; an absorbance time change value acquirer that finds time change values of the absorbances corresponding to the four wavelengths on the basis of the received light intensity information of the four wavelengths; a calibration data table that stores calibration data for finding a predetermined component in blood based on the absorbance time change values; and a component concentration acquirer that finds the concentration of the predetermined component in the blood.

First claim

The invention claimed is:

1 . A blood component concentration measurement device comprising:
four LEDs that are configured to be driven, in order, for a predetermined time, wherein each of the four LEDs is configured to emit a different wavelength of light toward a predetermined site on a living body; a light receiver that is configured to receive light that is emitted from each of the four LEDs and transmitted though the predetermined site on the living body, a data input interface that receives an output from the light receiver corresponding to the different wavelength of light emitted by each of the four LEDs, wherein the data input interface obtains light data on the different wavelength of light emitted by each of the four LEDs and performs A/D conversion to convert the light data into light intensity information; a central processing unit; and a non-transitory computer-readable recording medium that stores executable instructions that define an absorbance time change value acquirer and that define a component concentration acquirer, the executable instructions that define the absorbance time change value acquirer cause the central processing unit to compute an intermediate parameter using the following equation:

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b
1

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1

a
2

b
2

c
2

d
2

a
3

b
3

c
3

d
3

a
4

b
4

c
4

d
4

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Assignees

• Aist
• Cbc Co Ltd

Inventors

• Furukawa Hiromitsu
• WATANABE Anri
• Nakamura Shinichi
• Aizawa Hiroaki

Classifications

• A61B5/1455 Primary

  using optical sensors, e.g. spectral photometrical oximeters · CPC title

• G01N21/3577

  for analysing liquids, e.g. polluted water · CPC title

• A61B5/14532 Primary

  for measuring glucose, e.g. by tissue impedance measurement · CPC title