支气管哮喘严重发作持续不止,经常规治疗无效,有威胁生命之虞者,称为哮喘持续状态。过去曾规定发作持续若干日以上,作为诊断标准之一。现在认为,哮喘严重发作的精确时间很难明确。不少哮喘患者在开始发作时症状轻微,以后才逐渐变为严重。在论述抢救措施前,有必要对本病的病理变化、发病 Serious attacks of bronchial asthma continued more than routine treatment ineffective, there are life-threatening those who are called asthma sustained state. In the past, it was stipulated that the attack lasts for more than a few days as one of the diagnostic criteria. It is now difficult to pinpoint the exact timing of severe asthma attacks. Many asthmatic patients have mild symptoms at the beginning of the episode and later become severely affected. In discussing the rescue measures, it is necessary to pathological changes of the disease, the incidence