Earlier criteria The classic diagnosis of<unk>  may be assigned at 28 days of life if the following criteria are met: # Positive pressure ventilation during the first 2 weeks of life for a minimum of 3 days. # Clinical signs of abnormal respiratory function. # Requirements for supplemental oxygen for longer than 28 days of age to maintain PaO2 above 50 mm Hg. # Chest radiograph with diffuse abnormal findings characteristic of<unk> . Newer criteria The 2006 National Institute of Health (US) criteria for<unk>  (for neonates treated with more than 21% oxygen for at least 28 days) is as follows:, ;Mild * Breathing room air at 36 weeks' post-menstrual age or discharge (whichever comes first) for babies born before 32 weeks, or * breathing room air by 56 days' postnatal age, or discharge (whichever comes first) for babies born after 32 weeks' gestation. ;Moderate * Need for 30% oxygen, with or without positive pressure ventilation or continuous positive pressure at 36 weeks' postmenstrual age, or discharge (whichever comes first) for babies born before 32 weeks, or * need for >30% oxygen with or without positive pressure ventilation or continuous positive pressure at 56 days' postnatal age, or discharge (whichever comes first) for babies born after 32 weeks' gestation.
Bronchopulmonary dysplasia
Bronchomalacia
Tracheobronchomalacia
Tracheomalacia
Respiratory bronchiolitis
Asthma
Malacia
Emphysema