支气管哮喘是一种最常见的呼吸系统急症,好发于冬季和季节转换时期。寒冷、呼吸道感染等常可诱发该病。发作时,由于支气管平滑肌痉挛,管腔变窄,气体进出受阻而引起呼吸困难。临床上表现为带有哮鸣音的呼气性呼吸困难,一般持续数分钟至数小时,经治疗或休息后好转。若发作持续24小时以上,则称为哮喘持续状态,应及时抢救。 Bronchial asthma is one of the most common respiratory emergencies and occurs during the winter and seasonal transitions. Cold, respiratory infections often induce the disease. Attack, due to bronchial smooth muscle spasm, narrowing of the lumen, gas access blocked and cause breathing difficulties. Clinical manifestations of exhaled wheeze breathing difficulties, usually lasts for several minutes to several hours, improved after treatment or rest. If the attack lasted more than 24 hours, then called asthma sustained state, should be promptly rescued.