User-worn device for noninvasively measuring a physiological parameter of a user

Patent metadata

Field	Value
Publication number	US-10945648-B2
Application number	US-202017031316-A
Country	US
Kind code	B2
Filing date	Sep 24, 2020
Priority date	Jul 3, 2008
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

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 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.

First claim

What is claimed is:

1. 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 tissue of a user;
a protrusion comprising a convex surface and a plurality of openings extending through the protrusion, the openings arranged over the photodiodes and 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 at least one of the photodiodes and determine measurements of oxygen saturation of the user.

2. The user-worn device of claim 1 , 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.

3. The user-worn device of claim 1 further comprising optically transparent glass windows, each window extending across a different one of the openings.

4. The user-worn device of claim 1 , wherein the plurality of LEDs and the photodiodes are positioned on a same side of tissue of the user.

5. The user-worn device of claim 1 , wherein the protrusion further comprises an opaque material, and wherein the one or more signals are substantially free of noise caused by light piping.

6. A user-worn device comprising:
a first set of light emitting diodes (LEDs), the first set of LEDs 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 a user;
a protrusion arranged above the surface, the protrusion comprising a convex surface including windows, the windows extending across the four photodiodes, wherein light passes through the protrusion to the four photodiodes via at least the windows;
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 photodiodes;
receive the temperature signal; and
adjust operation of the user-worn device responsive to the temperature signal.

7. The user-worn device of claim 6 , 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.

8. 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, at least a portion of the protrusion comprising an opaque material;
a plurality of openings provided through the protrusion and the convex surface, 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 a user;
a housing; and
a strap configured to position the housing proximate tissue of the user when the device is worn.

9. The user-worn device of claim 8 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.

10. The user-worn device of claim 9 further comprising a user interface including a touch-screen display configured to display indicia responsive to the measurements of the physiological parameter.

11. The user-worn device of claim 10 , wherein an orientation of the user interface is configurable responsive to a user input.

12. The user-worn device of claim 8 , wherein the physiological parameter comprises oxygen or oxygen saturation.

13. The user-worn device of claim 8 further comprising a storage device configured to at least temporarily store at least the measurements of the physiological parameter.

14. The user-worn device of claim 8 , wherein the physiological parameter comprises pulse rate.

15. The user-worn device of claim 8 further comprising a thermistor.

16. The user-worn device of claim 8 , wherein the openings are configured to prevent light piping.

17. The user-worn device of claim 8 , wherein the housing hermetically seals at least a portion of an interior of the user-worn device.

18. The user-worn device of claim 8 , wherein the windows comprise a conductive material.

19. The user-worn device of claim 8 , wherein the windows are arranged on the protrusion configured to be in contact with tissue of the user.

20. 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 tissue of a user;
a protrusion comprising a convex surface and a plurality of through holes, each through hole including a window and arranged over a different one of the at least four photodiodes; and
one or more processors configured to receive one or more signals from at least one of the photodiodes and determine measurements of oxygen saturation of the user.

21. The user-worn device of claim 20 , 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.

22. The user-worn device of claim 20 , wherein the plurality of LEDs and the photodiodes are positioned on a same side of the user's tissue.

23. The user-worn device of claim 20 , wherein the one or more signals are substantially free of noise caused by light piping.

24. The user-worn device of claim 20 , wherein the protrusion comprises opaque material configured to substantially prevent light piping.

25. The user-worn device of claim 20 , further comprising gaps between the photodiodes and the windows.

26. The user-worn device of claim 20 , wherein the photodiodes are arranged in a quadrant configuration.

27. The user-worn device of claim 26 , further comprising opaque walls surrounding the photodiodes.

28. The user-worn device of claim 27 , wherein the walls are configured to reduce mixing of light from distinct quadrants of the tissue.

29. The user-worn device of claim 20 , wherein the protrusion further comprises one or more extensions.

Assignees

• Masimo Corp

Inventors

• Poeze Jeroen
• Lamego Marcelo
• Merritt Sean
• Dalvi Cristiano
• Vo Hung
• Bruinsma Johannes
• Lesmana Ferdyan
• Kiani Massi Joe E
• Olsen Greg

Classifications

• A61B5/7275

  Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor · CPC title

• A61B5/70

  Means for positioning the patient in relation to the detecting, measuring or recording means · CPC title

• A61B5/4875

  Hydration status, fluid retention of the body · CPC title

• A61B5/14551

  for measuring blood gases · CPC title

• A61B5/02427

  Details of sensor · CPC title