D. Infants with ARDS-ALI [55] Infants beyond neonatal age (> 30 days of life) and < 1 year of age under mechanical ventilation and having PaO 2 /FiO 2 ratio < 200 (ARDS) or < 300 (ALI), chest-X rays typical for ARDS-ALI, acute onset of the respiratory distress and no cardiogenic oedema/increase in left atrial pressure.