Fig. 1
From: Bedside monitoring of lung volume available for gas exchange
Algorithm to calculate lung volume available for gas exchange. The text in the coloured boxes summarises the main steps in the algorithm leading to the equation used for the calculation of lung volume available for gas exchange. The text in the white boxes presents the physiological and signal conditions imposed a priori for the automatic processing and analysis of the raw PaO2 signal, necessary for a bias-free selection of the representative period that was used for the automatic calculation of lung volume available for gas exchange. Additional methodological details are presented in the methods. PaO2 arterial partial pressure of oxygen; SNR: signal-to-noise ratio; V̇O2: oxygen uptake; Patm: atmospheric pressure; LV: lung volume