支气管肺发育不良(bronchopulmonary dysplasia,BPD)是早产儿、尤其是小早产儿呼吸系统常见疾病。近年来,由于早产儿存活率提高,BPD发生率也有逐年增加的趋势,并成为新生儿重症监护病房(neonatal intensive care unit,NICU)最为棘手的问题之一,也是婴儿期慢性呼吸系统疾病的主 Bronchopulmonary dysplasia (BPD) is a common respiratory condition in preterm infants, especially in small premature infants. In recent years, the incidence of BPD has also been increasing year by year due to the increased survival rate of premature infants and has become one of the most intractable problems in the neonatal intensive care unit (NICU). It is also a major cause of infantile chronic respiratory diseases