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Annals of Intensive Care
Fig. 2 | Annals of Intensive Care

Fig. 2

From: Surgical mask on top of high-flow nasal cannula improves oxygenation in critically ill COVID-19 patients with hypoxemic respiratory failure

Fig. 2

Repeated SpO2 performed with high flow nasal cannula before the test alone (HFNC before test), in presence of the surgical mask (HFNC/surgical mask) and finally again with high flow nasal cannula alone (HFNC after test). *p < 0.05 in a within-factor ANOVA with Bonferroni correction for multiple comparisons. HNCF before compared to HFNC after the test showed no statistical difference in paired t tests

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