Hepatopulmonary Syndrome (HPS) HPS-differential diagnosis: 1. Pulmonary vasculature 2. Diseases of the lung parenchyma 3. Pleura and diaphragm HPS-diagnosis: 1. Patients with liver disease 2. Alveolar-arterial oxygen gradient (AaPO2) >15 mmHg or >20 mmHg in patients >64 years 3. Intrapulmonary vasodilatation HPS-severity classification #Hepatopulmonary #Syndrome #HPS #hepatology #pulmonary #diagnosis