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Annals of Intensive Care
Fig. 3 | Annals of Intensive Care

Fig. 3

From: Effects of CPAP and FiO2 on respiratory effort and lung stress in early COVID-19 pneumonia: a randomized, crossover study

Fig. 3

Changes in PaO2 and DO2 with positive pressure and FiO2. Changes in PaO2 A and DO2 B between steps in COVID-19 patients; The overall p value for the change in PaO2 between the five steps was < 0.01 (not shown). Black dots: single patients; Boxplots: medians and interquartile ranges; PaO2 arterial oxygen tension. NRB Non-rebreather mask. DO2 oxygen delivery

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