Living body information measuring apparatus

• US 20060079741A1
• Filed: 11/28/2005
• Published: 04/13/2006
• Est. Priority Date: 07/22/2003
• Status: Active Grant

• Current Assignee: Toshiba Medical Systems Corporation (Canon Inc.)
• Original Assignee: Toshiba Medical Systems Corporation (Canon Inc.), Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kanayama, Shoichi
• Granted Patent: US 7,389,131 B2
• Time in Patent Office: Days
• US Class Current: 600/316
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters

Abstract

A living body information measuring apparatus includes an optical system for irradiating light to a subject and detecting light from the subject, a signal processing portion for acquiring information with regard to a tissue condition of the subject based on a detecting signal of light, and a position determining portion for determining an acceptability of an irradiating position of light based on the detecting signal of light.

Claims

1. A living body information measuring apparatus including:

means for irradiating light to a subject;

means for detecting light from the subject;

means for acquiring information with regard to a tissue condition of the subject based on a detecting signal of the light; and

position determining means for determining an acceptability of a position of irradiating the light based on the detecting signal of the light.

2. The living body information measuring apparatus according to claim 1, wherein the position determining means determines that the irradiating position is proper when an intensity of the detecting signal of the light falls in a proper range.

3. The living body information measuring apparatus according to claim 1, wherein the position determining means determines that the irradiating position is proper when a width of varying the detecting signal of the light is lower than a threshold.

4. The living body information measuring apparatus according to claim 1, further including means for indicating the acceptability of the determined irradiating position by a lighted color of a display lamp or a message display of a display.

5. The living body information measuring apparatus according to claim 1, further including means for indicating the acceptability of the determined irradiating position by voice or a vibration.

6. The living body information measuring apparatus according to claim 1, wherein the information with regard to the tissue condition of the subject is a body fluid component concentration in a cell of an organism tissue, or outside the cell of the organism tissue, the body fluid component concentration is a glucose concentration, and in determining the glucose concentration, light having a wavelength selected at least from a region of 400 through 2500 nm is used.

7. The living body information measuring apparatus according to claim 6, wherein the body fluid component concentration is a concentration of hemoglobin included in the blood, and in determining the hemoglobin concentration, light having a wavelength selected from at least a region of 500 through 2500 nm is used.

8. A living body information measuring apparatus including:

a light irradiating portion for irradiating light to a subject;

means for detecting light diffused, transmitted or reflected in the subject;

means for acquiring information with regard to a tissue condition of the subject based on a detecting signal of the light;

position determining means for determining an acceptability of a position of irradiating the light based on the detecting signal of the light;

a moving mechanism for moving the light irradiating portion substantially in parallel with the body surface of the subject; and

control means for controlling the moving mechanism for moving the light irradiating portion when the position of irradiating the light is determined to be improper.

9. A living body information measuring apparatus including:

light irradiating means for irradiating light to a subject;

means for detecting light diffused, transmitted or reflected in the subject;

means for acquiring information with regard to a tissue condition of the subject based on a detecting signal of the light; and

means for determining an acceptability of an irradiating intensity of the light based on the detecting signal of the light.

10. The living body information measuring apparatus according to claim 9, further including control means for controlling the light irradiating means for changing an irradiating intensity of the light when the irradiating intensity of the light is determined to be improper.

11. A living body information measuring apparatus including:

a light irradiating portion for irradiating light to a subject;

means for detecting light diffused, transmitted or reflected in the subject;

means for acquiring information with regard to a tissue condition of the subject based on a detecting signal of the light; and

means for determining an acceptability of a contact pressure of the light irradiating portion to the subject based on the detecting signal of the light.

12. The living body information measuring apparatus according to claim 11, further including:

a moving mechanism for moving the light irradiating portion in a direction of approaching/separating from the subject; and

control means for controlling the moving mechanism for moving the light irradiating portion when the contact pressure is determined to be improper.

13. A living body information measuring apparatus including:

a light irradiating portion for irradiating light to a subject;

means for detecting light diffused, transmitted or reflected in the subject;

means for acquiring information with regard to a tissue condition of the subject based on a detecting signal of the light;

means for detecting a temperature of the subject; and

means for determining an acceptability of the detected temperature.

14. The living body information measuring apparatus according to claim 13, further including:

heating/heat absorbing means for heating the subject/absorbing heat from the subject; and

control means for controlling the heating/heat absorbing means for changing the temperature of the subject when the detected temperature is determined to be improper.

15. The living body information measuring apparatus according to claim 14, wherein the heating/heat absorbing means includes a Peltier element.