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US 2013/0281805 A1Published application
Method and system for detection of respiratory variation in plethysmographic oximetry
AssigneeLos Angeles Biomedical Research Institute at Harbor-UCLA Medical Center
InventorsGregory R. Mason, John M. Criley, Stuart R. Criley
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Abstract
A method and system for detection of pulsus paradoxus are provided. In one embodiment, the method includes determining a power spectrum density for a plethysmographic waveform and identifying pulsus paradoxus based on the power spectrum density. The power spectrum density may include a first wave peak indicative of a respiratory rate and a second wave peak indicative of a heart rate. Pulsus paradoxus can be identified by comparing a height of the first wave peak and a height of the second wave peak.
Claims16
A method comprising:
- determining a power spectrum density for a plethysmographic waveform;
- and
- automatically identifying pulsus paradoxus based on the power spectrum density.
A system comprising:
- a database to store data representing a physiological condition of a patient over a period of time, wherein the data comprises data corresponding to respiratory activity and data corresponding to a heart rate, wherein the data corresponding to respiratory activity corresponds to a first wave peak and the data corresponding to the heart rate corresponds to a second wave peak and the first wave peak and the second wave peak are determined using fast-Fourier transform analysis;
- and
- a module for comparing a height of the first wave peak and the second wave peak and detecting an abnormality indicative of pulsus paradoxus, wherein when an abnormality is detected an alarm is triggered to alert a health care provider of the abnormality.
Dependencies are inferred from the claim text.