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Plethysmograph pulse recognition processor

  • US 9,675,286 B2
  • Filed: 08/02/2011
  • Issued: 06/13/2017
  • Est. Priority Date: 12/30/1998
  • Status: Expired due to Term
First Claim
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1. A method of determining a pulse rate measurement of a monitored patient from a signal responsive to light absorption by tissue of the monitored patient, said method comprising:

  • receiving data from a plurality of sensors including a noninvasive optical sensor, wherein said data is responsive to light attenuated by tissue;

    electronically processing said data using an electronic signal processor including;

    identifying candidate pulses from the received data based on a triangular wave model;

    extracting pulse features from the identified candidate pulses;

    determining physiologically acceptable pulses from the identified candidate pulses based on the extracted pulse features;

    extracting one or more pulse statistics from the determined physiologically acceptable pulses, wherein said one or more pulse statistics represent a confidence associated with the physiologically acceptable pulses;

    selecting a pulse rate from pulse measurements derived from the plurality of sensors based on the extracted one or more pulse statistics representing the confidence associated with the physiologically acceptable pulses; and

    displaying the selected pulse rate,wherein said one or more pulse statistics comprise pulse density.

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