DEVICE AND METHOD FOR VITAL SIGN MEASUREMENT OF A PERSON

• US 20140031696A1
• Filed: 04/16/2012
• Published: 01/30/2014
• Est. Priority Date: 04/21/2011
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Schmeitz, Harold Agnes Wilhelmus, Van Elswijk, Gijs Antonius Franciscus, Gillies, Murray Fulton, Bartula, Marek Janusz, Tijs, Tim Johannes Willem
• Granted Patent: US 10,178,957 B2
• Time in Patent Office: Days
• US Class Current: 600/473
• CPC Class Codes: A61B 2505/07 Home care
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• 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 5/1128 using image analysis A61B5/1127 takes precedence
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

The present invention relates to a device (1) for vital sign measurement of a person (2), comprising presentation means (10) for presenting a person (2) with a visual theme (20), illumination means (11) for illuminating an illumination area (3), in which said person (2) is located, whose vital signs shall be measured, optical measurement means (12) for optically detecting optical detection signals (23) from said illumination area (3), evaluation means (13) for evaluating said optical detection signals (23) and deriving a vital sign information (24) from them, and control means (14) for controlling said illumination means (11) to illuminate said illumination area (3) allowing the detection of optical detection signals (23), from which a vital sign information (24) can be derived despite changes of the visual theme (20).

Claims

1. Device for vital sign measurement of a person, comprising:

presentation means for presenting a person with a visual theme,

illumination means for illuminating an illumination area, in which said person is located, whose vital signs shall be measured,

optical measurement means for optically detecting optical detection signals from said illumination area,

evaluation means for evaluating said optical detection signals and deriving a vital sign information from them,

control means for controlling said illumination means to illuminate said illumination area allowing the detection of optical detection signals, from which a vital sign information can be derived despite changes of the visual theme.

2. Device as claimed in claim 1,

wherein said control means is configured to control said presentation means to provide a visual theme in a way that does not prevent the detection of optical detection signals allowing deriving vital signal information from them, in particular to provide a visual theme having changes at a speed outside of the range of the detection of optical detection signals.

3. Device as claimed in claim 1,

wherein said control means is configured to control said illumination means and/or said presentation means based on a feedback from said evaluation means.

4. Device as claimed in claim 3,

wherein said control means is configured to control said illumination means and/or said presentation means based on a quality indicator indicating the quality of the vital sign information and/or the derivation of said vital sign information from said optical detection signals.

5. Device as claimed in claim 1,

comprising a remote photoplethysmography device including said optical detection means and said evaluation means, wherein said evaluation means is configured to derive a PPG signal as said vital sign information from said optical detection signals.

6. Device as claimed in claim 1,

wherein said control means is configured to control said illumination means and said presentation means to alternately illuminate said illumination area and present said visual theme and to control said optical detection means to detect optical detection signals only when said illumination area is illuminated.

7. Device as claimed in claim 6,

wherein said control means is configured to control the percentage of the time during which the illumination means illuminates said illumination area and said optical detection means detects optical detection signals.

8. Device as claimed in claim 1,

wherein said control means is configured to control said illumination means to compensate for changes in illumination by the presentation of the visual theme, in particular for changes in brightness and/or color.

9. Device as claimed in claim 1,

wherein said evaluation means is configured to derive a respiration rate and/or a respiration depth of said person from said optical detection signals.

10. Device as claimed in claim 1,

further comprising correction means for correcting said optical detection signals to correct for changes of the visual theme, in particular per complete illumination area or sub-areas thereof.

11. Device as claimed in claim 1,

wherein said presentation means includes an ambient healing equipment for presenting a person with an audiovisual theme.

12. Device as claimed in claim 1,

wherein said illumination means includes a point light source, in particular an LED for emitting visual or infrared light.

13. Device as claimed in claim 1,

wherein said illumination means includes at least two light sources for separately illuminating illumination sub-areas of said illumination area and

wherein said control unit is configured to individually control said at least two light sources, wherein a light source is only switched on if a person is present in the associated illumination sub-area.

14. Method for vital sign measurement of a person, comprising the steps of:

presenting a person with a visual theme,

illuminating an illumination area, in which said person is located, whose vital signs shall be measured,

optically detecting optical detection signals from said illumination area,

evaluating said optical detection signals and deriving a vital sign information from them,

controlling said step of illuminating to illuminate said illumination area allowing the detection of optical detection signals, from which a vital sign information can be derived despite changes of the visual theme.

15. Computer program comprising program code means for causing a computer to carry out the steps of evaluating and controlling of the method as claimed in claim 14 when said computer program is carried out on the computer.