哮喘慢性持续期和急性发作期的概念主要是从症状来区分的。哮喘症状的特点是发作性和间歇性,因此在慢性持续期其症状尽管出现的程度和频率不一,但多数仍具有发作性的特质,换言之,这也是一种急性症状,可以自行缓解或用药后很快缓解,比如说吸入沙丁胺醇数分钟内症状明显缓解或消失。如果如牟文所言,这种急性症状,或只要需要使用缓解症状药物,均划入急性发作期,则就不存在慢性持续期的概念了。关于急性发作期,定义首先是关于时相的,突然发生、急骤出现,谓之sudden-onset,或在原有基础上逐渐加 The concept of chronic persistent and acute exacerbation of asthma is largely differentiated from the symptoms. Asthma symptoms are characterized by episodic and intermittent symptoms that, although their symptoms develop at varying degrees and in varying degrees of frequency during the chronic phase, most still have episodic traits, in other words, they are also acute symptoms that can be relieved or administered on their own After quickly relieve, for example, inhaled salbutamol symptoms significantly alleviate or disappear within a few minutes. If Mu Wen said that such acute symptoms, or as long as the need to use anti-symptoms drugs are classified as acute exacerbation, there is no concept of chronic duration. On the acute exacerbation, the definition of the first is about the phase, a sudden, emergent, that sudden-onset, or gradually increase on the basis of the original