PHOTOPLETHYSMOGRAPHIC MEASUREMENT METHOD AND APPARATUS

• US 20150148633A1
• Filed: 08/13/2014
• Published: 05/28/2015
• Est. Priority Date: 11/27/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Sang Yun
• Granted Patent: US 10,016,153 B2
• Time in Patent Office: Days
• US Class Current: 600/323
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/6801 specially adapted to be attached to or worn on the body surface

Abstract

Provided are a photoplethysmographic measurement apparatus, a photoplethysmographic measurement method, and an apparatus for measuring a biosignal. The photoplethysmographic measurement apparatus includes a probe, a light emitter comprising a nonelectrical light source and disposed at one end of the probe, the light emitter configured to illuminate a measurement part, and a light receiver disposed at another end of the probe and configured to detect light reflected or transmitted by the illuminated measurement part.

Claims

1. A photoplethysmographic measurement apparatus comprising:

a probe;

a light emitter comprising a nonelectrical light source and disposed at one end of the probe, the light emitter configured to illuminate a measurement part; and

a light receiver disposed at another end of the probe and configured to detect light reflected or transmitted by the illuminated measurement part.

2. The apparatus of claim 1, wherein the nonelectrical light source comprises at least one selected from the group consisting of a chemiluminescent light source, a bioluminescent light source, a phosphorescent light source, and a radioactive light source.

3. The apparatus of claim 2, wherein the chemiluminescent light source comprises at least one selected from the group consisting of a luminol derivative, adamantane-dioxetane, an acridinium derivative, lucigenin, firefly luciferin, photoprotein, hydrazides, a Schiff base compound, an electrochemical luminescent substrate, and a luminescent oxygen channeling substrate.

4. The apparatus of claim 2, wherein the bioluminescent light source comprises at least one selected from the group consisting of luciferase, horseradish peroxidase, alkaline phosphatase, β

-galactosidase, and chloramphenicol acetyltransferase.

5. The apparatus of claim 2, wherein the nonelectrical light source comprises the chemiluminescent light source or the bioluminescent light source, and the light emitter is configured to be detachably attached to the apparatus.

6. The apparatus of claim 2, wherein the phosphorescent light source comprises at least one selected from the group consisting of alkaline aluminate, silicate aluminate, strontium aluminate, europium aluminate, dysprosium aluminate, and calcium aluminate.

7. The apparatus of claim 2, wherein the radioactive light source comprises tritium.

8. The apparatus of claim 1, wherein an intensity of the light emitted from the light source of the light emitter ranges from 20 to 200 millicandelas per square meter (mdc/m²).

9. The apparatus of claim 1, wherein a wavelength of the light emitted from the light source of the light emitter ranges from 570 to 580 nanometers (nm).

10. The apparatus of claim 1, further comprising an adhesive layer configured to be in contact with the measurement part.

11. The apparatus of claim 1, further comprising a covering configured to block external light.

12. The apparatus of claim 1, further comprising a transmitter configured to transmit a result obtained by the light receiver.

13. The apparatus of claim 1, further comprising an oxygen saturation calculator configured to calculate an oxygen saturation level based on a result obtained by the light receiver.

14. The apparatus of claim 1, wherein a wavelength of the light emitted from the light emitter ranges from 660 to 1,000 nm, and the apparatus is configured to measure an intravascular oxygen saturation level.

15. A method of using an apparatus comprising a nonelectrical light source and a light receiver, the method comprising:

illuminating a measurement part with the nonelectrical light source;

detecting, with the light receiver, light reflected or transmitted by the illuminated measurement part;

filtering a data signal from the light receiver; and

calculating a photoplethysmogram of a user based on the filtered data signal.

16. The method of claim 15, wherein the photoplethysmogram provides information regarding a heart rate or a respiratory rate of the user.

17. An apparatus for measuring a biosignal, the apparatus comprising:

a nonelectrical light source configured to illuminate a measurement part;

a light receiver configured to detect an electromagnetic radiation from the illuminated measurement part; and

a processing unit configured to calculate light absorption by the illuminated measurement part based on the detected electromagnetic radiation.

18. The apparatus of claim 17, wherein the nonelectrical light source and the light receiver are positioned on or within a probe.

19. The apparatus of claim 17, wherein the apparatus is configured to be detachably attached to the measurement part of a user, and the apparatus further comprises a transmitter configured to transmit a result obtained by the processing unit to a mobile terminal.

20. The apparatus of claim 17, wherein the probe is configured to be attached to a mobile terminal, to connect to a mobile terminal via a port, or to wirelessly communicate with a mobile terminal.