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. 2020 Aug 11;60:159–160. doi: 10.1016/j.jcrc.2020.08.007

Fig. 1.

Fig. 1

Effect of inhaled nitric oxide on arterial oxygenation in mechanically ventilated patients with COVID-19.

Partial pressure of oxygen to fraction of inspired oxygen ratio (p/f ratio) of patients before and at 30 min of 20 ppm inhaled nitric oxide (iNO) treatment. P-value refers to the paired t-test.