Grade 4 Bronchopulmonary Dysplasia, AE

**Semantic type:** Finding

**Definition:** An adverse event in a newborn characterized by the need for supplemental oxygen at 28 days AND need for greater than 30% oxygen AND positive pressure at 36 weeks postmenstrual age (PMA) in infants born less than 32 weeks' gestation; need for greater than 30% oxygen AND positive pressure by 56 days postnatal age in infants born greater than 32 weeks' gestation; need for greater than 30% oxygen AND positive pressure at discharge. Note: For conversion of oxygen administered by different modalities to fraction of inspired oxygen (FiO2): see http://nicutools.org/MediCalcs/ActualO2.php3.

**Synonyms:** - Grade 4 BPD, AE - Grade 4 Bronchopulmonary Dysplasia - Grade 4 Bronchopulmonary Dysplasia, Adverse Event