MULTI-STREAM DATA COLLECTION SYSTEM FOR NONINVASIVE MEASUREMENT OF BLOOD CONSTITUENTS

• US 20210007635A1
• Filed: 09/24/2020
• Published: 01/14/2021
• Est. Priority Date: 07/03/2008
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Poeze, Jeroen, Lamego, Marcelo, Merritt, Sean, Dalvi, Cristiano, Vo, Hung, Bruinsma, Johannes, Lesmana, Ferdyan, Kiani, Massi Joe E., Olsen, Greg
• Granted Patent: US 10,945,648 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0233 Special features of optical sensors or probes classified in A61B5/00
• CPC Class Codes: A61B 2562/04 Arrangements of multiple sensors of the same type
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 2562/146 for optical coupling
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• 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 5/4875 Hydration status, fluid retention of the body
• CPC Class Codes: A61B 5/6816 Ear lobe
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6829 Foot or ankle
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure
• CPC Class Codes: A61B 5/70 Means for positioning the patient in relation to the detecting, measuring or recording means
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor

Abstract

The present disclosure relates to noninvasive methods, devices, and systems for measuring various blood constituents or analytes, such as glucose. In an embodiment, a light source comprises LEDs and super-luminescent LEDs. The light source emits light at at least wavelengths of about 1610 nm, about 1640 nm, and about 1665 nm. In an embodiment, the detector comprises a plurality of photodetectors arranged in a special geometry comprising one of a substantially linear substantially equal spaced geometry, a substantially linear substantially non-equal spaced geometry, and a substantially grid geometry.

Claims

1. (canceled)

2. A user-worn device configured to non-invasively determine measurements of physiological parameter of a user, the user-worn device comprising:

a plurality of light emitting diodes (LEDs);

four photodiodes configured to receive light emitted by the LEDs, the four photodiodes being arranged to capture light at different quadrants of the tissue;

a protrusion arranged over the four photodiodes, the protrusion comprising a convex surface;

a plurality of openings in the protrusion, the openings configured to allow light to pass through the protrusion to the photodiodes; and

one or more processors configured to receive one or more signals from the photodiodes and determine measurements of oxygen saturation of the user.

3. The user-worn device of claim 2, wherein the one or more processors are further configured to process the one or more signals to determine a bulk measurement indicating a positioning of the user-worn device.

4. The user-worn device of claim 2 further comprising optically transparent glass windows, each window extending across a different one of the openings.

5. The user-worn device of claim 2, wherein the plurality of LEDs and the photodiodes are positioned on a same side of tissue of the user.

6. The user-worn device of claim 2, wherein the one or more signals are substantially free of noise caused by light piping.

7. A user-worn device comprising:

a first set of light emitting diodes (LEDs), the first set comprising at least an LED configured to emit light at a first wavelength and an LED configured to emit light at a second wavelength;

a second set of LEDs spaced apart from the first set of LEDs, the second set of LEDs comprising at least an LED configured to emit light at the first wavelength and an LED configured to emit light at the second wavelength;

four photodiodes arranged on a surface and configured to receive light after at least a portion of the light has been attenuated by tissue of the user;

a protrusion arranged above the surface, the protrusion comprising a convex surface extending over the four photodiodes;

a window extending across each of the four photodiodes;

a thermistor configured to provide a temperature signal; and

one or more processors configured to;

receive one or more signals from at least one of the at least four photodiodes;

receive the temperature signal; and

adjust operation of the user-worn device responsive to the temperature signal.

8. The user-worn device of claim 7, wherein the protrusion further comprises an opaque material, the opaque material extending from the convex surface of the protrusion to an interior surface of the protrusion opposite the convex surface.

9. A user-worn device configured to non-invasively determine measurements of a physiological parameter of a user, the user-worn device comprising:

a first set of light emitting diodes (LEDs), the first set comprising at least an LED configured to emit light at a first wavelength and at least an LED configured to emit light at a second wavelength;

a second set of LEDs spaced apart from the first set of LEDs, the second set of LEDs comprising an LED configured to emit light at the first wavelength and an LED configured to emit light at the second wavelength;

four photodiodes;

a protrusion comprising a convex surface extending over the photodiodes, at least a portion of the protrusion comprising an opaque material;

a plurality of openings provided through the convex protrusion, the openings aligned with the photodiodes;

a separate optically transparent window extending across each of the openings;

one or more processors configured to receive one or more signals from at least one of the photodiodes and output measurements of a physiological parameter of the user;

a housing; and

a strap configured to position the housing proximate tissue of the user when the device is worn.

10. The user-worn device of claim 9 further comprising a network interface configured to wirelessly communicate the measurements of the physiological parameter to at least one of a mobile phone or a computer network.

11. The user-worn device of claim 10 further comprising a user interface including a touch-screen display configured to display indicia responsive to the measurements of the physiological parameter.

12. The user-worn device of claim 11, wherein an orientation of the user interface is configurable responsive to a user input.

13. The user-worn device of claim 9, wherein the physiological parameter comprises oxygen or oxygen saturation.

14. The user-worn device of claim 9 further comprising a storage device configured to at least temporarily store at least the measurements of the physiological parameter.

15. The user-worn device of claim 9, wherein the physiological parameter comprises pulse rate.

16. The user-worn device of claim 9 further comprising a thermistor.

17. The user-worn device of claim 9, wherein the openings are configured to prevent light piping.

18. The user-worn device of claim 9, further comprising a housing, wherein the housing hermetically seals at least a portion of an interior of the user-worn device.

19. The user-worn device of claim 9, wherein the window comprises a conductive material.

20. The user-worn device of claim 9, wherein the windows are arranged on the protrusion to be in contact with tissue of the user.

21. A user-worn device configured to non-invasively determine measurements of a user'"'"'s tissue, the user-worn device comprising:

a plurality of light emitting diodes (LEDs);

at least four photodiodes configured to receive light emitted by the LEDs, the four photodiodes being arranged to capture light at different quadrants of the tissue;

a protrusion arranged over the four photodiodes, the protrusion comprising a convex surface;

a plurality of windows configured to allow light to pass to the photodiodes; and

one or more processors configured to receive one or more signals from the photodiodes and determine measurements of oxygen saturation of the user.

22. The user-worn device of claim 21, wherein the one or more processors are further configured to process the one or more signals to determine a bulk measurement indicating a positioning of the user-worn device.

23. The user-worn device of claim 21, wherein the plurality of LEDs and the photodiodes are positioned on a same side of the user'"'"'s tissue.

24. The user-worn device of claim 21, wherein the one or more signals are substantially free of noise caused by light piping.

25. The user-worn device of claim 21, wherein the protrusion comprises opaque material configured to substantially prevent light piping.

26. The user-worn device of claim 21, further comprising gaps between the photodiodes and the windows.

27. The user-worn device of claim 21, wherein the photodiodes are arranged in a quadrant configuration.

28. The user-worn device of claim 27, further comprising opaque walls surrounding the photodiodes.

29. The user-worn device of claim 28, wherein the walls are configured to reduce mixing of light from distinct quadrants of the tissue.

30. The user-worn device of claim 21, wherein the protrusion further comprises one or more extensions.

31. The user-worn device of claim 21, wherein the protrusion further comprises one or more chamfered edges.