BODY-WORN PULSE OXIMETER

  • US 20100324387A1
  • Filed: 09/14/2009
  • Published: 12/23/2010
  • Est. Priority Date: 06/17/2009
  • Status: Active Grant
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First Claim
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1. A system for monitoring both blood pressure and oxygen saturation values from a patient, comprising:

  • a first sensor comprising;

    a first radiation source configured to emit optical radiation at a first wavelength;

    a second radiation source configured to emit optical radiation at a second wavelength;

    a photodetector configured to detect radiation emitted by the first radiation source after it passes through a portion of the patient to generate a first time-dependent signal, and radiation emitted by the second radiation source after it passes through a portion of the patient to generate a second time-dependent signal; and

    a housing comprising the first and second radiation sources and the photodetector, the housing configured to attach to one of the patient'"'"'s fingers;

    a second sensor comprising;

    at least two electrodes, each configured to attach to the patient and measure electrical signals and an electrical circuit configured to receive and process the electrical signals to determine a time-dependent electrical signal; and

    a processing unit configured to be worn on the patient'"'"'s arm and connected to the first sensor to receive the first and second time-dependent signals, and to the second sensor to receive the time-dependent electrical signal, the processing unit comprising a processor configured to process;

    i) the first and second time-dependent signals to determine AC signals, or signals derived therefrom, to determine the oxygen saturation value; and

    ii) at least one of the AC signals and the electrical signal, or signals derived therefrom, to determine the blood pressure value.

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