早产儿发生率占新生儿的5％～10％，其围产儿死亡率明显高于足月儿，死亡的主要原因是缺氧及颅内出血。因此，吸氧在救治早产儿时至关重要。由于早产儿生理上的缺陷，吸氧不慎就有发生氧中毒的可能。氧中毒可致新生儿各脏器损伤，如支气管一肺发育不全，晶体后纤维组织增生等并 The incidence of premature children accounted for 5% to 10% of newborns, the perinatal mortality was significantly higher than full-term children, the main cause of death was hypoxemia and intracranial hemorrhage. Therefore, oxygen in the treatment of premature children is crucial. Due to the physiological defects of premature children, oxygen inadvertently there may be oxygen poisoning. Oxygen poisoning can cause neonatal organ damage, such as bronchial lung hypoplasia, after the proliferation of crystal fiber and so on