IP Library › Granted Patent US 12,635,921
Granted Patent B2
US 12,635,921 · App. 18/600,517 · Granted May 26, 2026

Physiological measurement devices, systems, and methods

Inventor: Ammar Al-Ali (San Juan Capistrano, CA)
Assignee: Masimo Corporation
A61B5/14552A61B5/0002A61B5/02416A61B5/14532A61B5/14546A61B5/4875A61B5/6826A61B5/7278A61B5/742A61B2562/04
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Quick Facts
Patent No.
US 12,635,921
App. No.
18/600,517
Granted
May 26, 2026
Kind
B2
Abstract

A non-invasive, optical-based physiological monitoring system is disclosed. One embodiment includes an emitter configured to emit light. A diffuser is configured to receive and spread the emitted light, and to emit the spread light at a tissue measurement site. The system further includes a concentrator configured to receive the spread light after it has been attenuated by or reflected from the tissue measurement site. The concentrator is also configured to collect and concentrate the received light and to emit the concentrated light to a detector. The detector is configured to detect the concentrated light and to transmit a signal representative of the detected light. A processor is configured to receive the transmitted signal and to determine a physiological parameter, such as, for example, arterial oxygen saturation, in the tissue measurement site.

Claims (32)

1 . A physiological monitoring device comprising:

an emitter comprising a set of LEDs configured to emit light;

an engineered microlens-based material positioned between the emitter and tissue of a wrist of a user when the physiological monitoring device is attached to the user, wherein the engineered microlens-based material comprises a texture configured to change an output pattern by which light emitted by the emitter is directed toward the tissue;

a detector configured to detect at least a portion of the light emitted from the emitter after the light is attenuated by the tissue, the detector configured to output a signal responsive to the detected light, wherein the detector and the emitter are arranged in a reflectance measurement configuration;

a light block surrounding the detector and configured to prevent at least a portion of the light emitted from the emitter from reaching the detector without first passing through the tissue; and

a processor configured to determine a physiological parameter of the user responsive to the signal.

2 . The physiological monitoring device of claim 1 , wherein the engineered microlens-based material comprises glass.

3 . The physiological monitoring device of claim 1 , wherein the engineered microlens-based material comprises plastic.

4 . The physiological monitoring device of claim 1 , wherein the detector comprises one or more photodiodes.

5 . The physiological monitoring device of claim 1 , wherein the physiological parameter is oxygen saturation.

6 . The physiological monitoring device of claim 1 , wherein the light block comprises a circular chamber surrounding the detector.

7 . The physiological monitoring device of claim 1 , wherein the engineered microlens-based material is aligned with the emitter about an axis that is configured to be perpendicular to the tissue when the physiological monitoring device is attached to the user.

8 . The physiological monitoring device of claim 1 , wherein the light block comprises a first surface and a second surface, the first surface disposed along a same plane as the detector and the second surface configured to be positioned proximate the user's wrist when the physiological monitoring device is attached to the user.

9 . The physiological monitoring device of claim 8 , wherein the light block comprises a height extending between the first and second surfaces, and wherein the light block is configured such that, when the physiological monitoring device is attached to the user, the height of the light block is oriented perpendicular to the tissue.

10 . The physiological monitoring device of claim 1 , further comprising a surface comprising a dark-colored coating, the surface configured to be positioned between the detector and the tissue when the physiological monitoring device is attached to the user, wherein a window formed in the dark-colored coating is configured to allow light reflected from the tissue to pass through the surface and to the detector.

11 . The physiological monitoring device of claim 10 , wherein the surface comprising the dark-colored coating is configured to be positioned against the tissue when the physiological monitoring device is attached to the user.

12 . A physiological monitoring device comprising:

an emitter comprising a set of LEDs configured to emit light;

an engineered microlens-based material positioned between the emitter and tissue of a wrist of a user when the physiological monitoring device is attached to the user, wherein the engineered microlens-based material comprises a texture configured to change an output pattern by which light emitted by the emitter is directed toward the tissue;

a detector configured to detect at least a portion of the light emitted from the emitter after the light is attenuated by the tissue, the detector configured to output a signal responsive to the detected light, wherein the detector and the emitter are arranged in a reflectance measurement configuration;

a light block surrounding the detector and configured to prevent at least a portion of the light emitted from the emitter from reaching the detector without first passing through the tissue, wherein at least a portion of an end of the light block is configured to be positioned proximate skin of the user proximate the tissue when the physiological monitoring device is attached to the user; and

a processor configured to determine a physiological parameter of the user responsive to the signal.

13 . The physiological monitoring device of claim 12 , wherein the engineered microlens-based material comprises glass.

14 . The physiological monitoring device of claim 12 , wherein the engineered microlens-based material comprises plastic.

15 . The physiological monitoring device of claim 12 , wherein the detector comprises one or more photodiodes.

16 . The physiological monitoring device of claim 12 , wherein the physiological parameter is oxygen saturation.

17 . The physiological monitoring device of claim 12 , wherein the light block comprises a circular chamber surrounding the detector.

18 . The physiological monitoring device of claim 12 , wherein the engineered microlens-based material is aligned with the emitter about an axis that is configured to be perpendicular to the tissue when the physiological monitoring device is attached to the user.

19 . The physiological monitoring device of claim 12 , wherein the light block comprises a first surface and a second surface, the first surface disposed along a same plane as the detector and the second surface configured to be positioned proximate the user's wrist when the physiological monitoring device is attached to the user.

20 . The physiological monitoring device of claim 19 , wherein the light block comprises a height extending between the first and second surfaces, and wherein the light block is configured such that, when the physiological monitoring device is attached to the user, the height of the light block is oriented perpendicular to the tissue.

21 . The physiological monitoring device of claim 12 , further comprising a surface comprising a dark-colored coating, the surface configured to be positioned between the detector and the tissue when the physiological monitoring device is attached to the user, wherein an opening formed in the dark-colored coating is configured to allow light reflected from the tissue to pass through the surface and to the detector.

22 . The physiological monitoring device of claim 21 , wherein the surface comprising the dark-colored coating is configured to be positioned against the tissue when the physiological monitoring device is attached to the user.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 2, 2024
From: AL-ALI, AMMAR
To: MASIMO CORPORATION
Reel/Frame 067895/0905 →
Continuity (7)
Continuation 16871874 · May 11, 2020
Continuation 16835712 · Mar 31, 2020
Continuation 16791955 · Feb 14, 2020
Continuation 16532061 · Aug 5, 2019
Continuation 15195199 · Jun 28, 2016
Provisional Application 62188430 · Jul 2, 2015
Related Publication 20240245330A1 · Jul 25, 2024
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