Fig. 2From: Perioperative evaluation of respiratory impedance using the forced oscillation technique: a prospective observational studyComparison of pre- and postoperative respiratory impedance. All respiratory resistance components (R5, R20 and R5 − R20) increased significantly. Of the reactance components, X5 decreased and Fres and ALX increased significantly. All values are expressed as median with interquartile rangeBack to article page