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PLETHYSMOGRAPH VARIABILITY PROCESSOR

  • US 20080188760A1
  • Filed: 12/07/2007
  • Published: 08/07/2008
  • Est. Priority Date: 12/09/2006
  • Status: Active Grant
First Claim
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1. A plethysmograph variability method comprising:

  • inputting a plethysmograph waveform having a plurality of pulses corresponding to pulsatile blood flow within a tissue site;

    deriving a plurality of perfusion values corresponding to the pulses;

    determining a plurality of variability values each indicative of the variability of a series of the perfusion values;

    calculating a plethysmograph variability index representative of the variability values; and

    displaying the plethysmograph variability index.

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