Abstract
Supplemental oxygen is given to a large proportion of preterm infants to maintain adequate levels of oxygenation. In this population exposure to supplemental oxygen increases the risk of retinopathy of prematurity (ROP), bronchopulmonary dysplasia (BPD), and oxygen radical injury to other organs and systems (McColm and Fleck 2001; Tin and Gupta 2007; Saugstad 2003). These effects are more pronounced in infants born at earlier gestational ages due to their immaturity and the prolonged duration of the exposure to oxygen.