Fig. 6
From: Electrical impedance tomography in acute respiratory distress syndrome
Estimation of recruitable lung collapse and overdistension during decremental positive end-expiratory pressure (PEEP) maneuver. a Reduction of end-expiratory lung impedance (blue waves) in each PEEP step (yellow waves). b Respiratory system compliance, collapse, and overdistension at each stage of decremental PEEP maneuver. Note that PEEP of better global compliance (17 cmH2O) does not coincide with PEEP that minimizes collapse and overdistension estimated according to electrical impedance tomography (15 cmH2O). c Maps of overdistension and collapse in each PEEP step. Observe progressive increase of lung collapse with reduction of PEEP, predominantly in dependent region. Images generated by Enlight (Timpel SA, São Paulo, Brazil)