氧疗是治疗各种原因引起的低氧血症和缺氧的重要对症措施 ,其目的是以适当的方式给患儿输送氧气 ,提高肺泡氧分压 (PAO2 ) ,改善肺泡气体交换和氧运过程 ,从而提高动脉血氧分压 (PaO2 ) ,纠正缺氧 ,防止缺氧对机体组织和器官的不良影响和损害 ,同时应注意避免发生氧的不良反应 Oxygen therapy is an important symptomatic treatment of hypoxemia and hypoxia caused by a variety of causes, the purpose of which is to deliver oxygen to the child in an appropriate manner, to increase the alveolar oxygen pressure (PAO2), to improve alveolar gas exchange and oxygen transport Process, thereby increasing arterial partial pressure of oxygen (PaO2), correct hypoxia, to prevent hypoxia on the body tissues and organs of the adverse effects and damage, and should be taken to avoid adverse reactions to oxygen occurs