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可逆性气道阻塞(Reversible airway obstruction,RAO)常见于慢性阻塞性肺疾病及支气管哮喘患者,他们在症状发作期,部分患者即使在症状缓解期亦存在气道痉挛。使用支气管扩张剂舒张痉挛的支气管,以缓解患者的症状,是治疗可逆性气道阻塞的重要措施之一。由于口服支气管扩张药有较多的副作用,如心悸、手颤、头昏、头痛等,目前主张以气雾剂吸入作为首选治疗方式。其中β_2受体兴奋剂具有作用快、效果好,对大气道及周围小支气管均有作用等优点,更为常用。
Reversible airway obstruction (RAO) is common in patients with chronic obstructive pulmonary disease and bronchial asthma. Some of them also have airway spasm even during the symptom remission. Bronchodilator bronchodilator to relieve the symptoms of patients is one of the important measures to treat reversible airway obstruction. As oral bronchodilator drugs have more side effects, such as palpitations, hand tremor, dizziness, headache, etc., the current claim to aerosol inhalation as the preferred treatment. Β_2 receptor agonists which have the effect of fast, good effect on the airways and the surrounding small bronchial have the advantages, more commonly used.