MULTIPLE WAVELENGTH SENSOR EMITTERS
3 Assignments
0 Petitions
Accused Products
Abstract
A physiological sensor is adapted to removably attach an emitter assembly and a detector assembly to a fingertip. The emitter assembly is adapted to transmit optical radiation having multiple wavelengths into fingertip tissue. The detector assembly is adapted to receive the optical radiation after attenuation by the fingertip tissue. The sensor has a first shell and a second shell hinged to the first shell. A spring is disposed between the shells and urges the shells together. An emitter pad is fixedly attached to the first shell and configured to retain the emitter assembly. A detector pad is fixedly attached to the second shell and configured to retain the detector assembly. A detector aperture is defined within the detector pad and adapted to pass optical radiation to the detector assembly. A contour is defined along the detector pad and generally shaped to conform to a fingertip positioned over the detector aperture.
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Citations
40 Claims
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1-18. -18. (canceled)
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19. A physiological sensor configured to measure an indication of a physiological characteristic of a living patient, the physiological sensor comprising:
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a plurality of light emitting sources arranged to impinge light on body tissue of a living patient, each light emitting source activated by addressing at least one of a plurality of rows and at least one of a plurality of columns of an electrical grid, the light emitting sources capable of transmitting light of a plurality of wavelengths, the plurality of light emitting sources arranged to minimize optical pathlength differences; a detector responsive to the transmitted light after attenuation by body tissue of the living patient, the body tissue including pulsating blood, wherein the detector is configured to generate a signal indicative of a physiological characteristic of the living patient; and a sensor housing configured to position the plurality of light emitting sources and the detector with respect to the body tissue of the living patient. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for measuring a physiological characteristic of a living patient, the method comprising:
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positioning a sensor with respect to body tissue of a living patient, the sensor comprising a plurality of light emitting sources arranged to impinge light on the body tissue and a detector, the light emitting sources being arranged in an electrical grid comprising rows and columns, the light emitting sources arranged to minimize path-length errors; activating the plurality of light emitting sources, said activating each light emitting source comprising addressing at least one of the rows and at least one of the columns of the electrical grid, such that a plurality of wavelengths of light are emitted from the plurality of light emitting sources; detecting the light with the detector after attenuation by the body tissue of the living patient, the body tissue comprising pulsating blood; and generating a signal reflecting a physiological characteristic of the living patient responsive to the detected light. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification