Pattern of regional gas flow (analysis of global, ventral, middle and dorsal region-of-interest) in n = 6 pigs during pressure controlled ventilation in healthy condition (BL = baseline) and after lung injury induced by lavage (LAV = lavage). Black arrow: significant difference. Grey crossed arrow: no significant difference. a (left, top). Peak inspiratory flow (PIF). b (left, bottom). Late inspiratory flow (LIF). c (right, top). Peak expiratory flow (PEF). d (right, bottom). Late expiratory flow (LEF).