呼吸衰竭是各种疾病发展和恶化的最危险阶段。在呼吸衰竭过程中,若能给以积极的果断的抢救和治疗,大部分呼吸衰竭的病人能很快好转,甚至一部分呼吸停止的病人也可以恢复自主呼吸,以至全愈。但是,由于病情十分沉重或是其它原因以至呼吸衰竭不能有效控制,因而病人出现了呼吸停止;呼吸停止后又不能迅速地在数分钟内建立有效的辅助呼吸,造成长时间的组织缺氧;脑组织对缺氧的耐受力又非常低下,大脑皮层完全缺氧6～8分 Respiratory failure is the most dangerous phase of the development and worsening of various diseases. In the process of respiratory failure, given a positive and decisive rescue and treatment, most patients with respiratory failure can be quickly improved, and even some patients with respiratory arrest can resume spontaneous breathing, and even more. However, due to very heavy illness or other causes and respiratory failure can not be effectively controlled, so the patient appeared to stop breathing; respiratory arrest can not be quickly established within minutes effective secondary breathing, resulting in prolonged hypoxia; brain Tissue hypoxia tolerance is very low, the cerebral cortex completely hypoxia 6 to 8 points