Fig. 2. Airway resistance (Rn), inertance (I), and tissue damping (G) and elastance (H) in children with normal airways ( open symbols ) and/or with airway susceptibility (AS , closed symbols ). Data are pooled independently of the order of administration of the volatile agents and presented during propofol (Prop) and at 3, 8, and 13 min after administration of sevoflurane ( A ) and desflurane ( B ). Data are mean ± SEM (n = 20 in each group) . *P < 0.05 versus propofol within a group . # P < 0.05, normal versus AS.