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Pulse amplitude indexing method and apparatus

  • US 7,184,809 B1
  • Filed: 11/08/2005
  • Issued: 02/27/2007
  • Est. Priority Date: 11/08/2005
  • Status: Expired due to Fees
First Claim
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1. A device for the monitoring of a physiological characteristic of a patient'"'"'s blood, comprising:

  • a first radiation emitter that emits light at a first wavelength;

    a second radiation emitter that emits light at a second wavelength;

    a radiation detector configured to receive light at said first and second wavelengths after absorbance through said patient'"'"'s blood and provide a first intensity signal and a second intensity signal corresponding to said first and second received wavelengths; and

    a controller for computing said physiological characteristic of said patient'"'"'s blood by determining a pulse amplitude associated with said first and second intensity signals and indexing a monitored mathematical combination of said first and second intensity signals to said determined pulse amplitude, wherein said monitored mathematical combination is related to said physiological characteristic and calculated from said first and second intensity signals.

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