×

Perfusion trend indicator

  • US 20080221464A1
  • Filed: 01/22/2008
  • Published: 09/11/2008
  • Est. Priority Date: 01/20/2007
  • Status: Active Grant
First Claim
Patent Images

1. A perfusion trend 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;

    defining a plurality of time windows corresponding to the perfusion values;

    determining a plurality of representative perfusion values corresponding to the time windows; and

    calculating a perfusion trend according to differences between representative perfusion values of adjacent ones of the time windows.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×