- CV = coefficient of variation; functional residual capacity; LCI 2.5% norm = normalized lung clearance Index at 2.5%; LCI 5% norm = normalized lung clearance index at 5%; M1/M0 = moment ratio: non-uniform alveolar flow volume distribution; M2/M0 = moment ratio: lung regions that empty late during the washout; Scond*VT = convection-dependent inhomogeneity corrected for tidal volume; Sacin*VT = diffusion-convection-dependent inhomogeneity corrected for tidal volume; RQ= respiratory quotient; VT = tidal volume; VdCO2 = volume of gas coming from dead space; CEV = cumulative expired volume
