Systems and methods for determining respiration information from a photoplethysmograph
First Claim
1. A method for determining physiological information, the method comprising:
- generating, using processing equipment, a plurality of morphology metric signals based on a photoplethysmograph (PPG) signal;
generating, using the processing equipment, a plurality of autocorrelation sequences, wherein each autocorrelation sequence is derived from a respective one of the morphology metric signals; and
determining, using the processing equipment, the physiological information from the plurality of autocorrelation sequences.
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Abstract
A patient monitoring system may receive a photoplethysmograph (PPG) signal including samples of a pulse waveform. A plurality of morphology metric signals may be generated from the PPG signal. The system may generate an autocorrelation sequence for each of the morphology metric signals. An autocorrelation metric may be generated from each of the autocorrelation sequences and may represent the regularity or periodicity of the morphology metric signal. The autocorrelation sequences may be combined to generate a combined autocorrelation sequence, with the weighting of the autocorrelation sequences based on the autocorrelation metric. The combined autocorrelation sequence may be used to determine physiological information.
157 Citations
20 Claims
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1. A method for determining physiological information, the method comprising:
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generating, using processing equipment, a plurality of morphology metric signals based on a photoplethysmograph (PPG) signal; generating, using the processing equipment, a plurality of autocorrelation sequences, wherein each autocorrelation sequence is derived from a respective one of the morphology metric signals; and determining, using the processing equipment, the physiological information from the plurality of autocorrelation sequences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A patient monitoring system comprising:
a processor configured to; generate a plurality of morphology metric signals based on a photoplethysmograph (PPG) signal; generate a plurality of autocorrelation sequences, wherein each autocorrelation sequence is derived from a respective one of the morphology metric signals; and determine physiological information from the plurality of autocorrelation sequences. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification