Figure 3From: Fiber optic bronchoscopy in patients with acute hypoxemic respiratory failure requiring noninvasive ventilation - a feasibility studyChanges of PaO 2 /FiO 2 (A) and PaCO 2 (B), values given as mean ± SD. #: P < 0.001 compared to baseline; *: P < 0.05 compared to baseline.Back to article page