AaPO2 while breathing 100% O2 was obtained using the equation : PiO2 - (PaCO2 /R) - PaO2 (R : respiratory exchange ratio; PiO2 : partial pressure of O2 in the mask).192 patients (82 male) were included. A significant correlation was found between AaPO2 calculated on room air (X)...
Stage 2: evaluation of indices of pulmonary oxygen transfer After validation, the lung model was used to derive four commonly used indices of pulmonary oxygen transfer ( Q˙s/ Q˙t, Cc′O2–CaO2, P(a–a)O2 and PaO2/FiO2) as FiO2 was varied between 0.21 and 1.0. We assumed constant ...