In asthmatic crisis, remarkably high volumes of functional residual capacity (FRC), total lung capacity and residual volume can be observed, and tidal breathing occurs near predicted total lung capacity.
End-inspiratory lung volume at this pressure should have been subtracted from total changes in FRC resulting from PEEP withdrawal.
Work of breathing, functional residual capacity (FRC), total lung capacity (TLC) and dynamic lung compliance were measured using a forced pulmonary manoeuvre system (Buxco).
FEV1, forced vital capacity (FVC), FEV1/FVC, FRC, total lung capacity (TLC) and residual volume (RV) values were then compared to the predicted values[ 22].
FRC = ((total expired gas volume × nitrogen concentration)/(100 × 0.6)) - 1.92 (measured dead space of ventilator).
A WBP is required to measure residual volume (RV), functional residual capacity (FRC), and total lung capacity (TLC).
As lung volume continues to increase from FRC to total lung capacity, PVR increases and vascular capacitance decreases.
Current data suggest that TGI does not impact oxygenation provided that total inspired VT and FRC are not augmented during application of TGI.
It has been established that a decreasing curvilinear relationship between FRC and total airway resistance or lung resistance in obesity [ 36, 39, 40].
Subjects inhaled single breaths (from Functional Residual Capacity (FRC) to total lung capacity (TLC)) of capsaicin aerosol from a compressed air-driven nebulizer (model 646, Technipro, North Parramatta, Australia) controlled by a dosimeter (KoKo Digidoser 323200; Technipro Marketing Pty Ltd., Sydney, New South Wales, Australia).
