- Difference between different PARDS criterion.
| Parameters | Previous criterion (1994) | Current criterion (2012) |
|---|---|---|
| Age | Includes patients of all ages | Pediatric patients (excludes individuals having perinatal lung disease) |
| Duration | Not specified | New known injury worsened within 7 days |
| Origin of edema | Pulmonary artery wedge pressure ≤17 mm Hg | Respiratory failure is not entirely explained by cardiac failure |
| Chest imaging | Bilateral infiltrate in radiography | New infiltrate with severe pulmonary parenchymal disease in radiography |
| Oxygenation | PaO2/FiO2: acute lung injury <300 mm Hg | PaO2/FiO2: mild: 200 to 300 mm Hg, moderate: 100 to 200 mm Hg, Severe: ≤100 mm Hg |
| Positive end-expiratory pressure | Not specified | ≥5 cm H2O |
| Steroid treatment | Late-stage PARDS treated with a high dose of steroids after 12 days of mechanical ventilation | Steroid treatment is prohibited |
PARDS: pediatric acute respiratory distress syndrome