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

Patent metadata

Field	Value
Publication number	US-10912501-B2
Application number	US-202017031356-A
Country	US
Kind code	B2
Filing date	Sep 24, 2020
Priority date	Jul 3, 2008
Publication date	Feb 9, 2021
Grant date	Feb 9, 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 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 measure a physiological parameter of a user, the user-worn device comprising:
at least three light emitting diodes (LEDs);
at least three photodiodes arranged on an interior surface of the user-worn device and configured to receive light attenuated by tissue of the user;
a protrusion arranged over the interior surface, the protrusion comprising a convex surface and a plurality of openings extending through the protrusion and positioned over the three photodiodes, the openings each comprising an opaque lateral surface, the plurality of openings configured to allow light to reach the photodiodes, the opaque lateral surface configured to avoid light piping through the protrusion; and
one or more processors configured to receive one or more signals from the photodiodes and calculate a measurement of the physiological parameter of the user.

2. The user-worn device of claim 1 , wherein glass covers each of the openings.

3. The user-worn device of claim 1 further comprising:
a network interface configured to wirelessly communicate the measurement of the physiological parameter to a mobile phone;
a user interface comprising a touch-screen display, wherein the user interface is configured to display indicia responsive to the measurement of the physiological parameter;
a memory configured to at least temporarily store at least the measurement; and
a strap configured to position the user-worn device on the user.

4. The user-worn device of claim 1 further comprising:
a network interface configured to wirelessly communicate the measurement of the physiological parameter to a computer network;
a user interface comprising a touch-screen display, wherein the user interface is configured to display indicia responsive to the measurement of the physiological parameter;
a memory configured to at least temporarily store at least the measurement; and
a strap configured to position the user-worn device on the user.

5. The user-worn device of claim 1 further comprising:
at least one wall extending between the interior surface and the protrusion, wherein at least the interior surface, the wall and the protrusion form one or more cavities, wherein the photodiodes are arranged within the cavities.

6. The user-worn device of claim 1 , wherein the physiological parameter comprises oxygen or oxygen saturation.

7. The user-worn device of claim 1 , wherein the physiological parameter comprises pulse rate.

8. The user-worn device of claim 1 , wherein the physiological parameter comprises trending information.

9. The user-worn device of claim 1 further comprising:
a thermistor configured to output a temperature signal,
wherein the one or more processors are further configured to:
receive the temperature signal; and
adjust operation of the user-worn device responsive to the temperature signal.

10. The user-worn device of claim 9 , wherein the temperature signal is responsive to a temperature of the tissue of the user.

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

12. The user-worn device of claim 1 , wherein the convex surface of the protrusion is an outermost surface configured to contact the tissue of the user and conform the tissue into a concave shape.

13. 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 responsive to a positioning of the user-worn device.

14. The user-worn device of claim 1 , wherein:
the at least three LEDs comprises at least six LEDs;
a first set of LEDs includes three of the six LEDs;
a second set of LEDs includes a different three of the six LEDs;
the second set is spaced apart from the first set;
a first of the three LEDs in the first set of LEDs is configured to emit light at a first wavelength and a second of the three LEDs in the first set of LEDs is configured to emit light at a second wavelength; and
a first of the three LEDs in the second set of LEDs is configured to emit light at the first wavelength and a second of the three LEDs in the second set of LEDs is configured to emit light at the second wavelength.

15. The user-worn device of claim 1 , wherein the at least three photodiodes comprise four photodiodes arranged on the interior surface in a quadrant arrangement.

16. The user-worn device of claim 1 , wherein the protrusion further comprises one or more extensions.

17. The user-worn device of claim 16 , wherein the one or more extensions surround the convex surface.

18. The user-worn device of claim 1 , wherein the protrusion further comprises one or more chamfered edges.

19. A user-worn device comprising:
a plurality of light emitting diodes (LEDs);
at least three photodiodes arranged within the user-worn device and configured to receive light attenuated by tissue of a user;
a protrusion extending over the three photodiodes and comprising a convex surface, the protrusion including a separate window associated with each of the three photodiodes, an opaque material lining a lateral surface of the windows and extending through the protrusion, the opaque material configured to reduce an amount of light reaching the photodiodes without being attenuated by the tissue; and
one or more processors configured to receive one or more signals from at least one of the photodiodes, the one or more processors configured to output measurements responsive to the one or more signals, the measurements indicative of a physiological parameter of the user.

20. The user-worn device of claim 19 further comprising a thermistor.

21. The user-worn device of claim 20 , wherein the one or more processors are further configured to receive a temperature signal from the thermistor and adjust operation of the user-worn device responsive to the temperature signal.

22. The user-worn device of claim 19 , wherein the opaque material is configured to reduce an amount of noise caused by light piping in the one or more signals.

23. The user-worn device of claim 19 further comprising:
a network interface configured to wirelessly communicate the measurements to another computing device;
a user interface comprising a touch-screen display, wherein the user interface is configured to display indicia responsive to the measurements; and
a memory configured to at least temporarily store at least the measurements.

24. The user-worn device of claim 19 , wherein the physiological parameter comprises an oxygen saturation or oxygen measurement.

25. The user-worn device of claim 19 , wherein the physiological parameter comprises a pulse rate.

26. A user-worn device configured to non-invasively measure a pulse rate 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 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;
at least three photodiodes arranged on an interior surface of the user-worn device and configured to receive light attenuated by tissue of the user;
a thermistor config

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