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US 2021/0241903 A1Published application
Multiple wavelength sensor emitters
AssigneeCercacor Laboratories, Inc.
InventorsRobert A. Smith, David Dalke, Ammar Al-Ali, Mohamed K. Diab, Marcelo M. Lamego
Life of this patent
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Abstract
A physiological sensor has light emitting sources, each activated by addressing at least one row and at least one column of an electrical grid. The light emitting sources are capable of transmitting light of multiple wavelengths and a detector is responsive to the transmitted light after attenuation by body tissue.
Claims30
A physiological monitoring device comprising:
- at least two LEDs, the at least two LEDs configured to emit light of at least two different wavelengths;
- at least one detector configured to detect at least a portion of the light emitted from the at least two LEDs after at least a portion of the light has been attenuated by tissue, the at least one detector configured to output at least one signal responsive to the detected light;
- a light block surrounding the at least one detector, the light block forming a cavity, the light block comprising a light-absorbing material, the light block including only one circular opening through which light is configured to pass, an area of the circular opening being smaller than a surface area of a facing surface of the at least one detector;
- and
- a processor configured to receive and process one or more signals responsive to the outputted at least one signal and determine a physiological parameter of a user responsive to the one or more signals.
2 more elements
A method for determining a physiological parameter of a living patient, the method comprising:
- positioning a sensor with respect to body tissue of a living patient, the sensor comprising at least two LEDs, at least one detector, a light block surrounding the at least one detector, the at least two LEDs configured to emit light of at least two different wavelengths, the light block forming a cavity, the light block comprising a light-absorbing material, the light block including only one circular opening through which light is configured to pass, an area of the circular opening being smaller than a surface area of a facing surface of the at least one detector;
- activating the at least two LEDs;
- detecting, at the at least one detector, at least a portion of the light emitted from the at least two LEDs after at least a portion of the light has been attenuated by the body tissue and passed through the circular opening of the light block, wherein the at least one detector outputs at least one signal responsive to the detected light;
- and
- determining a physiological parameter of the living patient responsive to the outputted at least one signal.
2 more elements
A physiological sensor comprising:
- at least two LEDs, the at least two LEDs configured to emit light of at least two different wavelengths;
- at least one detector configured to detect at least a portion of the light emitted from the at least two LEDs after at least a portion of the light has been attenuated by tissue, the at least one detector configured to output at least one signal responsive to the detected light;
- and
- a light block surrounding the at least one detector, the light block forming a cavity, the light block comprising a light-absorbing material, the light block including only one circular opening through which light is configured to pass, an area of the circular opening being smaller than a surface area of a facing surface of the at least one detector.
1 more element
Dependencies are inferred from the claim text.