Noninvasive living body measuring apparatuses

• US 7,280,860 B2
• Filed: 02/12/2004
• Issued: 10/09/2007
• Est. Priority Date: 02/13/2003
• Status: Expired due to Fees

• Current Assignee: Sysmex Corporation
• Original Assignee: Sysmex Corporation
• Inventors: Saitou, Takeo, Ozawa, Toshiyuki, Ikeda, Yutaka, Kimura, Rokusaburo
• Primary Examiner(s): Winakur; Eric
• Assistant Examiner(s): Berhanu; Etsub D
• Application Number:
  US10/778,802
• Publication Number:
  US 20040162471A1
• Time in Patent Office: 1,335 Days
• Field of Search: 600/309, 600/310, 600/322, 600/323, 600/344
• US Class Current: 600/344
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/14535 for measuring haematocrit
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure

Abstract

Noninvasive living body measuring apparatuses are described, a representative one of which includes: (a) a light source unit for irradiating a measurement region of a living body; (b) a light-receiving unit for detecting optical information from an irradiated measurement region; (c) a first holding unit for holding the light source unit and the light-receiving unit; (d) a second holding unit for holding the first holding unit so as to be movable; and (e) a mounting unit for mounting the second holding unit onto a living body.

Claims

1. A noninvasive living body measuring apparatus comprising:

a light source unit for irradiating a measurement region of a living body;

a light-receiving unit for detecting optical information from an irradiated measurement region;

a first holding unit for holding the light source unit and the light-receiving unit;

a second holding unit for holding the first holding unit; and

a mounting unit for mounting the second holding unit onto the living body;

wherein the light-receiving unit comprises an objective lens and an image capturing element for capturing an image of the measurement region, and the first holding unit is rotatable around an optical axis of the objective lens when the mounting unit mounts the second holding unit onto the living body.

2. The apparatus of claim 1, wherein the light source unit comprises a first light source for irradiating a blood vessel in the measurement region.

3. The apparatus of claim 2, wherein the light source unit further comprises a second light source for irradiating tissue of the living body in the measurement region.

4. The apparatus of claim 2, further comprising an output unit for displaying optical information from the irradiated measurement region.

5. The apparatus of claim 3, wherein the light-receiving unit comprises a light-detecting element for detecting a light received from the tissue of the living body.

6. The apparatus of claim 1, wherein the mounting unit comprises at least one holder capable of holding the living body.

7. The apparatus of claim 1, wherein the first holding unit comprises an elastic member for elastically holding the light source unit and the light-receiving unit.

8. The apparatus of claim 1, further comprising:

an analyzing unit for analyzing detected optical information;

wherein

the analyzing unit comprises a calculating unit for calculating an amount of a blood component based on the captured image.

9. The apparatus of claim 1, wherein the light-receiving unit detects information of light reflected from the irradiated measurement region.

10. A noninvasive living body measuring apparatus comprising:

a first light source unit for irradiating a blood vessel;

a second light source unit for irradiating tissue of a living body;

a first light-receiving unit for detecting optical information from the blood vessel irradiated by the first light source unit;

a second light-receiving unit for detecting optical information from the tissue of the living body irradiated by the second light source unit; and

an analyzing unit for analyzing a blood component flowing in a blood vessel based on optical information detected by irradiation with the first and second light source units;

wherein the first light-receiving unit comprises an image capturing element for capturing an image of the blood vessel irradiated by the first light source unit, and the second light-receiving unit comprises a light-detecting element for detecting light received from the tissue of the living body irradiated by the second light source unit;

wherein the first light source unit comprises first and second light sources for irradiating a blood vessel interposed therebetween, and the second light source unit comprises third and fourth light sources at mutually different distances from the light-detecting element; and

wherein the image capturing element captures a first image of the blood vessel irradiated simultaneously by the first and the second light sources, a second image of the blood vessel irradiated by the first light source, and a third image of the blood vessel irradiated by the second light source, and wherein the light-detecting element detects light received from the tissue of the living body irradiated by the third light source, and light received from the tissue of the living body irradiated by the fourth light source.

11. The apparatus of claim 10, wherein the analyzing unit comprises a calculating unit for calculating an amount of the blood component based on a captured image, and the calculating unit corrects the amount of the blood component based on a detected result from the light-detecting element.

12. The apparatus of claim 10, wherein the analyzing unit comprises a calculating unit for calculating an amount of the blood component based on the first, second, and third images, and the calculating unit determines reliability of the amount of the blood component based on each detected result during irradiation by the third and fourth light sources and on characteristics of the second and third images obtained.

13. The apparatus of claim 10, wherein the analyzing unit comprises a calculating unit for calculating an amount of the blood component based on the first, second, and third images, and the calculating unit corrects the amount of the blood component based on each detected result during irradiation by the third and fourth light sources.

14. A noninvasive living body measuring apparatus comprising:

a plurality of light sources for irradiating a measurement region of a living body;

an image capturing optical system for detecting reflected light from an irradiated measurement region; and

a position adjuster for adjusting a position of the light sources with respect to a blood vessel of the living body;

wherein the plurality of light sources comprises four light sources arranged at respective corners of a rectangle, and wherein the position adjuster adjusts the position of the four light sources such that the blood vessel intersects two sides of the rectangle; and

wherein the position adjuster comprises;

a first holding unit for holding the light sources and the image capturing optical system;

a second holding unit for holding the first holding unit; and

a mounting unit for mounting the second holding unit onto the living body;

wherein the first holding unit is rotatable around an optical axis of an objective lens of the image capturing optical system when the mounting unit mounts the second holding unit onto the living body.

15. The noninvasive living body measuring apparatus of claim 14, wherein the position adjuster adjusts the position of the four light sources such that the blood vessel intersects two short sides of the rectangle.