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DIGITAL PHOTOPLETHYSMOGRAPHIC SIGNAL SENSOR

  • US 20060287589A1
  • Filed: 06/08/2006
  • Published: 12/21/2006
  • Est. Priority Date: 06/16/2005
  • Status: Abandoned Application
First Claim
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1. A photoplethysmographic sensor for use with a photoplethysmographic instrument, said sensor comprising:

  • at least first and second light signal emitters operable to transmit at least first and second light signals centered at first and second wavelengths, respectively, into a tissue site of a patient, wherein the tissue site attenuates the first and second light signals resulting in first and second attenuated light signals;

    a detector operable to detect the first and second attenuated light signals and to output an analog detector output signal corresponding to the first and second attenuated signals; and

    a signal processing device operable to receive the analog signal from said detector and to generate a digital signal corresponding to the analog detector output signal, the digital signal being communicable to the photoplethysmographic instrument whereby the photoplethysmographic instrument may obtain information from the digital signal relating to a physiological condition of the patient.

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