Figure 1From: Smallest detectable change in volume differs between mass flow sensor and pneumotachographCoefficient of variation (CV, left) and standard error of measurement (SEM, right) of vital capacity (VC), transfer factor for carbon monoxide (DLCO), alveolar volume (VA) and DLCO/VA. Each dot represents one hospital. MF is mass flow sensor; PT is pneumotachograph.Back to article page