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肺的主要功能是从外界吸取氧气,排出体内代谢产生的二氧化碳,完成此生理功能的先定条件是通畅的呼吸道。呼吸道阻塞引起通气分布不均,通气/血流比例失调,是发生低氧血症和 CO_2潴留的主要原因。因此解除呼吸道阻塞,保持呼吸道通畅,改善通气功能是纠正缺氧和消除 CO_2潴留的霞要措施;解除呼吸道阻塞是提高肺心病的治疗率和降低死亡率的重要环节水一。
The main function of the lungs is to draw oxygen from the outside world and to discharge the carbon dioxide produced by the body metabolism. The first condition to complete this physiological function is the unobstructed respiratory tract. Airway obstruction caused by uneven ventilation, ventilation / blood flow imbalance is the occurrence of hypoxemia and CO 2 retention of the main reasons. Therefore, the removal of airway obstruction, to maintain airway patency, improve ventilation is to correct hypoxia and eliminate the necessary measures to eliminate CO2; to relieve airway obstruction is to improve the treatment of pulmonary heart disease and reduce mortality an important part of water.