Respiratory waveform analyzer
AssigneeNihon Kohden Corporation
InventorsToshiki AOKI, Hidetoshi DAINOBU, Teiji UKAWA, Masahiro ECHIGO
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Abstract
A respiratory waveform analyzer, operable to analyze a respiratory waveform, which is generated based on a temporal change of a concentration of a component in respiratory gas of a subject, includes: a respiratory gas concentration generator which generates a concentration signal based on an output signal from a sensor that is placed to measure the concentration of the component; a flatness calculator which calculates a flatness indicative of flat degree of the respiratory waveform based on a temporal change of the concentration signal; and a reliability calculator which calculates a reliability of the respiratory waveform based on the flatness and the concentration signal.
Claims20
A respiratory waveform analyzer, operable to analyze a respiratory waveform, which is generated based on a temporal change of a concentration of a component in respiratory gas of a subject, the respiratory waveform analyzer comprising:
- a respiratory gas concentration generator which generates a concentration signal based on an output signal from a sensor that is placed to measure the concentration of the component;
- a flatness calculator which calculates a flatness indicative of flat degree of the respiratory waveform based on a temporal change of the concentration signal;
- and
- a reliability calculator which calculates a reliability of the respiratory waveform based on the flatness and the concentration signal.
A respiratory waveform analyzer, operable to analyze a respiratory waveform, which is generated based on a temporal change of a concentration of a component in respiratory gas of a subject, the respiratory waveform analyzer comprising:
- a respiratory gas concentration detector which converts a analog output signal from a sensor that is placed to detect the concentration of the component, to a digital respiratory gas signal;
- a respiratory gas concentration calculator which generates a respiratory waveform signal based on the respiratory gas signal from the respiratory gas concentration detector;
- and
- a concentration detection value corrector which corrects the respiratory waveform signal corresponding to the respiratory gas signal, in accordance with a ratio of the respiratory gas signal to a predetermined reference value.
A respiratory waveform analyzer, operable to analyze a respiratory waveform, which is generated based on a temporal change of a concentration of a component in respiratory gas of a subject, the respiratory waveform analyzer comprising:
- a respiratory airway adaptor in which the respiratory gas of the subject flows, the respiratory airway adaptor provided with a sensor that measures the concentration of the component to output a signal;
- a respiratory gas concentration generator which generates a concentration signal based on the signal output by the sensor, the concentration signal indicating degree of the concentration;
- and
- a liquid detector which detects a liquid in the respiratory airway adaptor based on the concentration signal.
Dependencies are inferred from the claim text.