It has many advantages including wide application, simple operation, decreased injury and stimulation to respiratory tract, less complication and reliable ventilation efficacy.
具有应用范围广，操作简便，对呼吸道的损伤、刺激小，并发症少，能维持有效、可靠的通气。
2
Methods:The nutritional support treatment was performed in 87 cases of serious patients post heart operation during mechanical ventilation.
方法：87 例各种类型的心脏手术后危重病人，在机械通气期间给予营养支持治疗。
3
To guide the design and operation of emergency ventilation system, intensive study on several key issues of emergency ventilation theory has conducted.