Figure 2

Meta-analysis of major outcomes high-flow nasal cannula as apneic oxygenation during endotracheal intubation in critically ill patients in the intensive care unit: Incidence of (A) severe hypoxemia (peripheral capillary oxygen saturation [SpO2] < 80%), (B) lowest oxygen saturation during intubation, (C) intensive care unit length of stay, (D) in-hospital mortality.