上气道阻塞(简称UAO)患者早期几乎没有什么症状,或者即使有些症状,如哮喘、呼吸困难,也无特异性,因此常易与支气管哮喘、慢性支气管炎、阻塞性肺气肿、反复发作的肺部感染等相混淆。对于UAO患者来说,一旦出现明显的症状或发生生理功能紊乱,则其气道阻塞多半已经进入晚期。而这类气道阻塞常可使患者致命,因此应强调早期发现和及时 Upper airway obstruction (UAO) patients with almost no symptoms early, or even if some symptoms, such as asthma, dyspnea, there is no specificity, it is often easy and bronchial asthma, chronic bronchitis, obstructive emphysema, recurrent Of lung infection and so confused. For UAO patients, once the obvious symptoms or physiological dysfunction occurs, the airway obstruction has mostly entered the advanced stage. Such airway obstruction can often make patients fatal, it should emphasize the early detection and timely