SYSTEM AND METHOD FOR DETERMINING VITAL SIGN INFORMATION OF A SUBJECT

• US 20140221847A1
• Filed: 01/28/2014
• Published: 08/07/2014
• Est. Priority Date: 02/05/2013
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: DUBIELCZYK, Alexander, NEUMANN, Rolf
• Granted Patent: US 10,660,524 B2
• Time in Patent Office: Days
• US Class Current: 600/479
• CPC Class Codes: A61B 2090/3945 Active visible markers, e.g. light emitting diodes
• CPC Class Codes: A61B 2560/0412 Low-profile patch shaped housings
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/0024 for multiple sensor units attached to the patient, e.g. using a body or personal area network
• 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 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/0082 adapted for particular medical purposes
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• 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 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/6842 by marking the skin
• CPC Class Codes: A61B 5/6898 Portable consumer electronic devices, e.g. music players, telephones, tablet computers
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

The present invention relates to remote photoplethysmography and in particular to a system and method for determining vital sign information of a subject. The system comprises a marker that is applied to a skin of the subject, said marker further comprising a first marker area configured to transmit light at a first wavelength and a second marker area configured to transmit light at a second wavelength, a detection unit that detects radiation received from the first marker area and from the second marker area of the marker, and an analysis unit that determines the vital sign information of the subject from the detected radiation from the first marker area and from the second marker area.

Claims

1. A system for determining vital sign information of a subject comprising

a marker that is applied to a skin of the subject, said marker further comprising a first marker area configured to transmit light at a first wavelength and a second marker area configured to transmit light at a second wavelength,

a detection unit that detects radiation received from the first marker area and from the second marker area of the marker, and

an analysis unit that determines the vital sign information of the subject from the detected radiation from the first marker area and from the second marker area.

2. The system according to claim 1,

further comprising an image processing unit that identifies the first marker area and the second marker area in the detected radiation.

3. The system according to claim 1,

further comprising a carrier element that carries the marker.

4. The system according to claim 3,

wherein the carrier element further comprises an adhesive that attaches the carrier element to the skin of the subject.

5. The system according to claim 3,

wherein the first marker area and/or the second marker area comprise an optical filter plate that is attached to the carrier element.

6. The system according to claim 1,

wherein the marker comprises a first dye applied to the skin of the subject in the first marker area and/or a second dye applied to the skin of the subject in the second marker area.

7. The system according to claim 1,

wherein the marker further comprises a reference area of predefined reflection characteristic.

8. The system according to claim 7,

wherein the reference area is opaque.

9. The system according to claim 1,

wherein the marker further comprises a graphical pattern.

10. The system according to claim 1,

wherein the first marker area and/or the second marker area comprise sub-areas.

11. The system according to claim 1,

wherein the marker further comprises a stimulant that increases the blood perfusion in a tissue of the subject in contact with the marker.

12. A marker for use in a system according to claim 1 comprising

a first marker area configured to transmit light at a first wavelength,

a second marker area configured to transmit light at a second wavelength, and wherein the marker is adapted for application to the skin of the subject.

13. A device for use in a system according to claim 1 comprising

a detection unit that detects radiation received from a first marker area, configured to transmit light at a first wavelength, and from a second marker area, configured to transmit light at a second wavelength, of a marker applied to the skin of the subject, and

an analysis unit that determines the vital sign information of the subject from the detected radiation from the first marker area and from the second marker area.

14. A method for determining vital sign information of a subject comprising the steps of:

detecting radiation received from a first marker area marker area, configured to transmit light at a first wavelength, and from a second marker area, configured to transmit light at a second wavelength, of a marker applied to a skin of the subject, and

determining the vital sign information of the subject from the detected radiation from the first marker area and from the second marker area.

15. The method according to claim 14 further comprising the step of:

applying the marker to the skin of the subject.

16. A computer readable non-transitory medium having instructions stored thereon which, when carried out on a computer, cause the computer to perform the steps of the method as claimed in claim 14.

17. A system for determining vital sign information of a subject comprising:

a marker for application to a skin of the subject, said marker further comprising a first marker area configured to transmit light at a first wavelength and a second marker area configured to transmit light at a second wavelength,

a detector for detecting radiation received from the first marker area and from the second marker area of the marker, and

an analyzer for determining the vital sign information of the subject from the detected radiation from the first marker area and from the second marker area.