Fig. 1

Example of the changes in pulmonary mechanics and regional ventilation distribution observed in one patient with acute respiratory distress syndrome (ARDS) treated with extracorporeal membrane oxygenation (ECMO) and ventilated with pressure-control ventilation. (a) represents the change in compliance observed between supine position and 30 min after prone position; (b) represents the variation in compliance between 30 and 180 min after prone position, and (c) represents the change in compliance between supine and 180 min after proning. Green area represents compliance gain and red region represents compliance loss. Vt tidal volume, PBW predicted body weight, Pplateau plateau pressure, PEEP positive end-expiratory pressure, EIT electrical impedance tomography