Hepatopulmonary syndrome: What we know and what we would like to know

Figure 1 Hypothesis for the natural history of hepatopulmonary syndrome. HPS: Hepatopulmonary syndrome; AaO₂: Alveolar-arterial oxygen gradient; DLCOco: Corrected diffusing capacity for carbon monoxide; ^99mTc-MAA: Macroaggregated albumin lung perfusion scan.

Figure 2 Hepatopulmonary syndrome screening model and diagnosis in liver transplantation candidates. AaO₂: Alveolar-arterial oxygen gradient; HPS: Hepatopulmonary syndrome; LT: Liver transplantation; pO₂: Partial oxygen pressure; Sat O₂: Arterial oxygen saturation; ^99mTc-MAA: Macroaggregated albumin lung perfusion scan.