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(a) Indicators of respiratory system. (b) General features in typical respiratory signals from sensors. ti: time of inspiration, te: time of expiration, tp: pause time, PiO2,CO2: partial pressure of O2/CO2 in inspiratory air (ambient air), PeO2,CO2: partial pressure of O2/CO2 in respiratory air. (c) Example of correlations between humidity and irregular breathing patterns.
