Multi-stream data collection system for noninvasive measurement of blood constituents

• US 10,376,191 B1
• Filed: 05/10/2019
• Issued: 08/13/2019
• 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
• Primary Examiner(s): Winakur, Eric F
• Assistant Examiner(s): Liu, Chu Chuan
• Application Number:
  US16/409,515
• Publication Number:
  US 20190261896A1
• Time in Patent Office: 95 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. A noninvasive optical physiological sensor comprising:

a plurality of emitters configured to emit light into tissue of a user;

a plurality of detectors configured to detect light that has been attenuated by tissue of the user, wherein the plurality of detectors comprise at least four detectors;

a housing configured to house at least the plurality of detectors in a circular portion of the housing; and

a lens configured to be located between tissue of the user and the plurality of detectors when the noninvasive optical physiological sensor is worn by the user, wherein the lens comprises a single outwardly protruding convex surface configured to cause tissue of the user to conform to at least a portion of the single outwardly protruding convex surface when the noninvasive optical physiological sensor is worn by the user and during operation of the noninvasive optical physiological sensor.

2. The noninvasive optical physiological sensor of claim 1, wherein the plurality of detectors are arranged on a two-dimensional surface of the housing.

3. The noninvasive optical physiological sensor of claim 2, wherein a first detector and a second detector of the plurality of detectors are arranged across from each other on opposite sides of a central point along a first axis, and a third detector and a fourth detector of the plurality of detectors are arranged across from each other on opposite sides of the central point along a second axis which is perpendicular to the first axis.

4. The noninvasive optical physiological sensor of claim 3, wherein the lens is comprised of a rigid material.

5. The noninvasive optical physiological sensor of claim 4, wherein the at least four detectors are evenly spaced from one another.

6. The noninvasive optical physiological sensor of claim 4, wherein the lens is configured to reduce a mean path length of light traveling to the plurality of detectors.

7. The noninvasive optical physiological sensor of claim 4, wherein the lens is configured to increase a signal to noise ratio of the noninvasive optical physiological sensor.

8. The noninvasive optical physiological sensor of claim 4, wherein the lens is configured to increase a signal strength per area of the plurality of detectors.

9. An optical physiological measurement sensor comprising:

a plurality of emitters configured to emit light into tissue of a user;

a housing including a planar surface;

at least four detectors arranged on the planar surface of the housing, wherein the four detectors are arranged in a grid pattern; and

a lens forming a cover of the housing, wherein at least a portion of the lens protrudes from the housing and the lens comprises a single convex surface.

10. The optical physiological measurement sensor of claim 9, wherein the lens is configured to cause tissue of the user to conform to at least a portion of the single convex surface when the optical physiological measurement sensor is worn by the user.

11. The optical physiological measurement sensor of claim 10, wherein the four detectors are arranged in a grid pattern such that a first detector and a second detector are arranged across from each other on opposite sides of a central point along a first axis, and a third detector and a fourth detector are arranged across from each other on opposite sides of the central point along a second axis which is perpendicular to the first axis.

12. The optical physiological measurement sensor of claim 11, wherein the lens is comprised of a rigid material.

13. The optical physiological measurement sensor of claim 12, wherein the lens is configured to be positioned between the at least four detectors and tissue of a user when the optical physiological measurement sensor is worn by the user.

14. The optical physiological measurement sensor of claim 13, wherein the lens is configured to press against and at least partially deform tissue of the user when the optical physiological measurement sensor is worn by the user.

15. The optical physiological measurement sensor of claim 14, wherein the at least four detectors are evenly spaced from one another.

16. The optical physiological measurement sensor of claim 15, wherein the lens is configured to reduce a mean path length of light traveling to the at least four detectors.

17. The optical physiological measurement sensor of claim 15, wherein the lens is configured to increase a signal to noise ratio of the optical physiological measurement sensor.

18. The optical physiological measurement sensor of claim 15, wherein the lens is configured to increase a signal strength per area of the at least four detectors.

19. The optical physiological measurement sensor of claim 9, wherein the lens comprises a light concentration window.