RT Book, Section A1 Gomella, Tricia Lacy A1 Cunningham, M. Douglas A1 Eyal, Fabien G. A1 Tuttle, Deborah J. SR Print(0) ID 1107528167 T1 Bronchopulmonary Dysplasia/Chronic Lung Disease T2 Neonatology: Management, Procedures, On-Call Problems, Diseases, and Drugs, 7e YR 2013 FD 2013 PB McGraw-Hill Education PP New York, NY SN 9780071768016 LK accesspediatrics.mhmedical.com/content.aspx?aid=1107528167 RD 2024/04/19 AB Classic bronchopulmonary dysplasia (BPD) is a neonatal form of chronic pulmonary disorder that follows a primary course of respiratory failure (eg, respiratory distress syndrome [RDS], meconium aspiration syndrome) in the first days of life. It is sometimes referred to as chronic lung disease (CLD) of prematurity. A “new” form of BPD has been described in extremely low birthweight infants. This occurs in infants who initially had none or modest initial ventilatory and oxygen needs. BPD is defined as persistent oxygen dependency up to 28 days of life. The severity of BPD-related pulmonary dysfunction in early childhood is more accurately predicted by an oxygen dependence at 36 weeks' postmenstrual age (PMA) in infants <32 weeks' gestational age (GA) and at 56 days of age in infants with older GA. BPD is thus classified at this later postnatal age according to the type of respiratory support required to maintain a normal arterial oxygen saturation (89%).