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(1) 给氧的指征:低氧血症的存在是诊断呼吸衰竭的必备条件之一,因而对呼吸衰竭病人给予吸氧的指微是明确的,但对某些类型的呼吸衰竭,肺脏本身无病变(如通气动力减弱引起者),在应用辅助呼吸后,就不一定需要吸氧。 (2) 给氧的危险:给氧不当可发生危险,在有二氧化碳潴留的呼吸衰竭患者,过高的PaCO_2对呼吸中枢产生抑制作用,此时呼吸主要靠缺氧对颈动脉体的化学感受器的兴奋来维持。如迅速高浓度给氧,可解除缺氧对呼
(1) Oxygen indications: The presence of hypoxemia is one of the prerequisites for the diagnosis of respiratory failure, and therefore oxygen fingerprinting of patients with respiratory failure is clear, but for some types of respiratory failure, The lung itself has no pathology (such as those caused by weakening ventilation) and does not necessarily require oxygen after assisted breathing. (2) the risk of oxygen: Improper oxygenation can be dangerous, in patients with respiratory failure of carbon dioxide retention, excessive PaCO_2 inhibition of the respiratory center, then mainly rely on hypoxia on carotid body chemoreceptor Excited to maintain. Such as rapid high concentration of oxygen, can lift the oxygen on the call