Fig. 4From: Outcome of acute respiratory distress syndrome in university and non-university hospitals in GermanyChange over time in gas exchange parameters and pH after onset of ARDS. a Partial pressure of arterial oxygen tension (PaO 2 ), b fraction of inspired oxygen (FiO 2 ), c arterial-to-inspired-oxygen (PaO 2 /FiO 2 ), d partial pressure of arterial carbon dioxide tension (PaCO 2 ), e pH. Error bars show 95% confidence intervalsBack to article page