Fig. 3From: Alveolar instability (atelectrauma) is not identified by arterial oxygenation predisposing the development of an occult ventilator-induced lung injuryExperimental timeline: Following instrumentation, lung injury, and thoracotomy, PEEP titrations were \incrementally increased by 3Â cmH2O until 18Â cmH2O was reached. Arterial blood gas (ABG) and in vivo microscopy at inspiration and expiration was recorded after a 5-min equilibrationBack to article page