Fig. 1.— Representative tracings of air flow (a–d) and airway pressure (Paw; e–h) in lungs ventilated with normal tidal volume (6 mL·kg−1; a, e), large tidal volume (12 mL·kg−1) with high rate high flow (b, f), low rate high flow (c, g) and low rate low flow (d, h). Note that residual flow at end-expiration was zero, indicating air trapping was absent.