Plethysmograph pulse recognition processor
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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Abstract
A time domain rule-based processor provides recognition of pulses in a pulse oximeter-derived waveform.
1022 Citations
4 Claims
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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:
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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. - View Dependent Claims (2)
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3. A system for determining a rate measurement of a monitored patient from a signal responsive to light absorption by tissue of a monitored patient, said system comprising an electronic signal processor configured to:
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receive data from a plurality of sensors including a noninvasive optical sensor, wherein said data is responsive to light attenuated by tissue, wherein said tissue may vary in optical density over time due to volumetric changes; identify candidate pulses from the received data based on a triangular wave model; extract pulse features from the identified candidate pulses; determine physiologically acceptable pulses from the identified candidate pulses based on the extracted pulse features; calculate one or more pulse statistics of the determined physiologically acceptable pulses; select a pulse rate from pulse measurements derived from the plurality of sensors based on the calculated one or more pulse statistics of the determined physiologically acceptable pulses; and display the selected pulse rate, wherein the one or more pulse statistics comprise pulse density. - View Dependent Claims (4)
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Specification