LIVING-BODY INFORMATION MEASUREMENT DEVICE

• US 20170273631A1
• Filed: 08/04/2016
• Published: 09/28/2017
• Est. Priority Date: 03/28/2016
• Status: Abandoned Application

• Current Assignee: Fuji Xerox Company Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Fujifilm Holdings Corporation)
• Inventors: SAKAI, Kazuhiro, UMEKAWA, Hideyuki, KOJIMA, Tomoaki, AKAMATSU, Manabu
• Application Number:
  US15/228,074
• Publication Number:
  US 20170273631A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0238 Optical sensor arrangements for performing transmission measurements on body tissue
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/0295 using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: A61B 5/725 using specific filters therefor, e.g. Kalman or adaptive filters A61B5/316 take precedence
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence

Abstract

Provided is a living-body information measurement device including a first light emitting element and a second light emitting element each that emits different light in wavelength, a light receiving element that receives the light emitted from the first and second light emitting elements and outputs a received light signal corresponding to an amount of the received light, a separation unit that separates the received light signal into a first received light signal and a second received light signal, a filter that removes noise components of the first received light signal and the second received light signal, and a measuring unit that measures plural living-body information using the first received light signal before the noise components are removed by the filter, the first received light signal whose noise components are removed by the filter, and the second received light signal whose noise components are removed by the filter.

Claims

1. A living-body information measurement device comprising:

a first light emitting element and a second light emitting element each that emits different light in wavelength;

a light receiving element that receives the light emitted from the first light emitting element and the second light emitting element and outputs received light signal corresponding to an amount of the received light;

a separation unit that separates the received light signal into a first received light signal corresponding to the amount of received light emitted from the first light emitting element and a second received light signal corresponding to the amount of received light emitted from the second light emitting element;

a filter that removes noise components of the first received light signal and the second received light signal; and

a measuring unit that measures a plurality of living-body information using the first received light signal before the noise components are removed by the filter, the first received light signal whose noise components are removed by the filter, and the second received light signal whose noise components are removed by the filter.

2. The living-body information measurement device according to claim 1,

wherein the measuring unit measures the plurality of living-body information using a frequency spectrum of the first received light signal before the noise components are removed by the filter, and a ratio of a change in the second received light signal whose noise components are removed by the filter to a change in the first received light signal whose noise components are removed by the filter.

3. The living-body information measurement device according to claim 1,

wherein the measuring unit measures living-body information including a blood flow or a blood velocity and an oxygen saturation in blood, as the plurality of living-body information, and

wherein the oxygen saturation in blood is measured using a ratio of a change in the second received light signal whose noise components are removed by the filter to a change in the first received light signal whose noise components are removed by the filter.

4. The living-body information measurement device according to claim 1,

wherein the measuring unit measures living-body information including a blood flow or a blood velocity and an oxygen saturation in blood, as the plurality of living-body information, and

wherein the blood flow or the blood velocity is measured using a frequency spectrum of the first received light signal.

5. The living-body information measurement device according to claim 1,

wherein the filter is a band pass filter.

6. The living-body information measurement device according to claim 1,

wherein the filter is a low pass filter.