Fig. 2From: Effects of inhaled nitric oxide for postoperative hypoxemia in acute type A aortic dissection: a retrospective observational studyComparison of perioperative PaO2/FiO2 ratios between the iNO and control groups. * p < 0.01 compared with oxygenation index before iNO. iNO: inhaled nitric oxideBack to article page