吸氧即吸入氧气。是临床常用的治疗方法，氧疗主要是缓解缺氧的一种方法。适量吸氧用于纠正缺氧，提高动脉血氧分压和氧饱和度的水平，促进代谢，是辅助治疗多种疾病的重要方法之一。

Inhale oxygen. Oxygen therapy is mainly a method to relieve hypoxia. Appropriate oxygen inhalation is one of the important methods to correct hypoxia, improve the level of arterial oxygen partial pressure and oxygen saturation, and promote metabolism.

氧疗指各类缺氧的治疗，除了消除引起缺氧的原因外，均可给予吸氧治疗。吸入高浓度氧使血浆中溶解氧量增加能改善组织的供氧。缺氧是指组织供氧不足或利用障碍，引起机体机能代谢甚至形态结构发生改变的一系列病理变化过程。
Oxygen therapy refers to the treatment of various kinds of hypoxia. Besides eliminating the causes of hypoxia, oxygen therapy can be given. Inhalation of high concentration oxygen increases dissolved oxygen in plasma, which can improve tissue oxygen supply. Hypoxia refers to a series of pathological changes, which are caused by the lack of tissue oxygen supply or the disorder of tissue utilization, resulting in the changes of the body's functional metabolism and even the morphological structure.