呼吸衰竭的定义可为肺不能以正常效率完成气体交换功能,导致动脉血氧张力(PaO_2)降低(<60mmHg)、二氧化碳张力(PaCO_2)增高(>50mmHg)。机体可通过驱氧进入血液和二氧化碳排出以增加压力差来进行代偿。急性呼吸衰竭必须关注呼吸衰竭的迅速出现,主要因为机体氧的贮存量极少,只能完全依赖呼吸系统供应机体持续代谢的需要。所以必须强调对每例虽解除上呼吸道阻塞也不能立即缓解的急性 Respiratory failure is defined as the inability of the lungs to perform gas exchange with normal efficiency resulting in reduced PaO_2 (<60 mmHg) and increased PaCO_2 (> 50 mmHg). The body can be compensated by driving oxygen into the blood and removing carbon dioxide to increase the pressure differential. Acute respiratory failure must pay attention to the rapid emergence of respiratory failure, mainly because the body’s oxygen storage is minimal, can only rely entirely on the respiratory system to provide continuous metabolism of the body’s needs. Therefore, we must emphasize the acute relief of upper respiratory tract obstruction for each case can not immediately relieve