Review
Copyright ©The Author(s) 2018.
World J Gastroenterol. Mar 28, 2018; 24(12): 1285-1298
Published online Mar 28, 2018. doi: 10.3748/wjg.v24.i12.1285
Table 2 Hepatopulmonary syndrome-severity classification
MildAlveolar-arterial oxygen gradient ≥ 15 mmHg, partial pressure of oxygen ≥ 80 mmHg
ModerateAlveolar-arterial oxygen gradient ≥ 15 mmHg, partial pressure of oxygen ≥ 60 mmHg to < 80 mmHg
SevereAlveolar-arterial oxygen gradient ≥ 15 mmHg, partial pressure of oxygen ≥ 50 mmHg to < 60 mmHg
Very severeAlveolar–arterial oxygen gradient ≥ 15 mmHg, partial pressure of oxygen < 50 mmHg