Systems and methods for determining respiration information based on principal component analysis
OwnerJimmy Dripps, Scott McGonigle +3inventors
InventorsJimmy Dripps, Scott McGonigle, James Ochs, Paul Stanley Addison, James Watson
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Abstract
A patient monitoring system may receive a physiological signal such as a photoplethysmograph (PPG) signal. A plurality of respiration morphology signals may be determined from the PPG signal. Principal component analysis may be performed on the respiration morphology signals, resulting in one or more principal components. Respiration information such as respiration rate may be determined at least in part from a principal component that corresponds to a respiration source signal.
Claims20
A method comprising:
- receiving a photoplethysmograph (PPG) signal;
- processing, with processing equipment, the PPG signal to generate a plurality of respiration morphology signals;
- performing, with the processing equipment, principal component analysis on the plurality of respiration morphology signals to generate one or more principal components;
- identifying, with the processing equipment, a principal component of the one or more principal components that corresponds to a respiration source signal;
- and
- determining, with the processing equipment, respiration information based at least in part on the identified principal component.
The method of claim 7, wherein generating the combined signal comprises:
- determining a confidence value for each of the identified principal component and the one or more of the plurality of respiration morphology signals;
- and
- generating a combined signal from the identified principal component and the one or more of the plurality of respiration morphology signals based on the confidence values.
A non-transitory computer-readable storage medium for use in determining respiration information for a patient, the computer-readable medium having computer program instructions recorded thereon for:
- receiving a photoplethysmograph (PPG) signal;
- processing the PPG signal to generate a plurality of respiration morphology signals;
- performing principal component analysis on the plurality of respiration morphology signals to generate one or more principal components;
- identifying a principal component of the one or more principal components that corresponds to a respiration source signal;
- and
- determining respiration information based at least in part on the identified principal component.
A patient monitoring system comprising processing equipment configured to:
- receive a photoplethysmograph (PPG) signal;
- process the PPG signal to generate a plurality of respiration morphology signals;
- perform principal component analysis on the plurality of respiration morphology signals to generate one or more principal components;
- identify a principal component of the one or more principal components that corresponds to a respiration source signal;
- and
- determine respiration information based at least in part on the identified principal component.
Dependencies are inferred from the claim text.