Figure 1From: Failure of non-invasive ventilation in patients with acute lung injury: observational cohort studyOutline of the study. CPAP, continuous positive airway pressure; DNI, do not intubate; DNR, do not resuscitate; NIPPV, non-invasive positive pressure ventilation. PaO2/FiO2, ratio of arterial partial pressure of O2 and inspired O2 concentrationBack to article page