氧疗是慢性阻塞性肺病(ＣＯＰＤ)的标准治疗方式。对慢性支气管炎或肺气肿患者,适当的氧疗可纠正低氧血症,降低肺动脉压和发病率。非控制氧疗可引起肺泡通气下降、呼吸性酸中毒及意识障碍。人们一直认为给严重气道阻塞的哮喘患者高浓度氧疗是无害的,但作者在治疗有ＣＯ２潴留的哮喘呼吸衰竭时,观察到吸氧浓度从１００%降至２４%,患者的ＣＯ２分压 Oxygen therapy is the standard treatment for chronic obstructive pulmonary disease (COPD). For patients with chronic bronchitis or emphysema, appropriate oxygen therapy can correct hypoxemia and reduce pulmonary arterial pressure and morbidity. Non-controlled oxygen therapy can cause decreased alveolar ventilation, respiratory acidosis and disturbance of consciousness. It has been assumed that high oxygen therapy is not harmful to asthmatic patients with severe airway obstruction, but the authors observed a reduction in oxygen concentration from 100% to 24% for the treatment of respiratory failure with CO2 retention of asthma. The patient’s CO2 fraction Pressure