초록

A time domain rule-based processor provides recognition of pulses in a pulse oximeter-derived waveform.

대표청구항 ▼

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 li

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; anddisplaying the selected pulse rate,wherein said one or more pulse statistics comprise pulse density. 2. The method of claim 1, wherein said pulse statistics comprise at least one of median value of pulse periods, signal strength of pulses, and signal strength confidence level. 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: 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; anddisplay the selected pulse rate,wherein the one or more pulse statistics comprise pulse density. 4. The system of claim 3, wherein the pulse features comprise at least one of the following: pulse starting point, period, and signal strength.