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Perfusion index smoother

  • US 8,280,473 B2
  • Filed: 10/12/2007
  • Issued: 10/02/2012
  • Est. Priority Date: 10/12/2006
  • Status: Active Grant
First Claim
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1. A method performed on a processor of smoothing a perfusion index measurement displayed in an oximeter system, the method comprising:

  • establishing a baseline perfusion index during quality signal conditions of a signal responsive to intensity signals acquired from a detector capable of detecting light attenuated by body tissue, anddisplaying a single value of perfusion index, the single value being the baseline perfusion index if a current signal includes motion-induced noise and a current PI derived from the current signal is not lower than the baseline PI, otherwise the single value being the current perfusion index.

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