所谓重症哮喘系指对各种支气管扩张剂有耐药性,疗效不显,持续地处于顽固的喘息状态,进而陷入急性呼吸衰竭等重笃状态;或同时对激素有依赖性的喘息而言。临床特征 1.重症喘息时,由于有高度的支气管痉挛和气管内异常分泌,支气管内易形成粘液栓而窒息。此时支气管扩张剂常无效。 2.动脉血气分压的变化。普通喘息发作时一般的是PaO_2低下,而PaCO_2仍在正常范围。重症喘息发作时,由于合并粘液栓阻塞气 The so-called severe asthma refers to a variety of bronchodilators have resistance, curative effect is not significant, continued to stubborn state of wheezing, and then plunged into acute respiratory failure and other conditions; or at the same time hormone-dependent wheezing is concerned. Clinical features 1. Severe wheezing, due to a high degree of bronchospasm and abnormal secretion of the trachea, bronchial mucosal suppository easily formed suffocation. Bronchodilators are often ineffective at this time. 2. arterial partial pressure of blood gas changes. Ordinary wheezing attack is generally PaO_2 low, while PaCO_2 is still in the normal range. Severe wheezing attack, blocking gas due to mucus plug