Figure 4

Physiologic parameters; Physiologic parameters resulting from ventilation strategies (2005–2013) at five U.S. academic medical centers. Average of median peak inspiratory pressure (PIP) at top, average of median blood oxygen saturation (SpO₂) in middle, and average of median end-tidal carbon dioxide (EtCO₂) at bottom. Error bars indicate 25^th and 75^th percentile ranges.