Grading of severity of hepatopulmonary syndrome
| Stage of hepatopulmonary syndrome | Partial pressure of oxygen |
|---|---|
| Mild | ≥80 mmHg (≥10.66 kPa) |
| Moderate | 60–79 mmHg (7.99–10.65 kPa) |
| Severe | 50–59 mmHg (6.66–7.98 kPa) |
| Very severe | <50 mmHg (<6.66 kPa) <300 mmHg (<39.99 kPa) on 100% oxygen |