呼吸衰竭 一、呼吸衰竭的概念 呼吸分为内呼吸和外呼吸,内呼吸指细胞水平O_2与CO_2的变换,外呼吸指肺内气体的交换。我们日常所谓呼吸衰竭,是指肺不能完成气体交换来保持血中O_2及CO_2正常水平。外呼吸功能是由呼吸系统完成,故呼吸衰竭除肺损害外还可能由脑、呼吸中枢、胸廓、肌肉等疾病所致。呼衰分类 Respiratory failure First, the concept of respiratory failure Respiration is divided into internal respiration and external respiration, internal respiration refers to the level of cells O_2 and CO_2 conversion, external breathing refers to the exchange of gas in the lungs. Our daily so-called respiratory failure, refers to the lungs can not complete the exchange of gas to maintain normal blood levels of O_2 and CO_2. Exo-respiratory function is completed by the respiratory system, so respiratory failure in addition to lung damage may also be caused by the brain, respiratory center, thorax, muscles and other diseases. Respiratory failure classification