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支气管哮喘发作超过12小时,经用一般支气管扩张剂治疗无效,症状进行性加重,出现呼吸衰竭者称为哮喘持续状态。此种状态下,患者极度呼吸困难,皮肤粘膜明显紫绀,大汗淋漓,焦虑不安,脉搏细速,可出现奇脉,血压下降,全身衰竭。肺部听诊哮鸣音反而减弱或消失。血气分析:PaCo_2>60mm·Hg,PaO_2<50mm·Hg。此类病人必须及时得到有效急救治疗,否则可因呼吸衰竭而丧命。哮喘持续状态常规治疗方法是:去除诱
Bronchial asthma attack more than 12 hours, the general treatment of bronchodilator ineffective, progressive worsening of symptoms, respiratory failure, known as asthma persistence. In this state, patients with extreme difficulty in breathing, skin and mucosa was cyanotic, sweating, anxiety, pulse speed, there may be strange pulse, blood pressure, systemic failure. Pulmonary auscultation but wheeze weakened or disappeared. Blood gas analysis: PaCo_2> 60mm · Hg, PaO_2 <50mm · Hg. Such patients must be promptly treated with effective first aid, otherwise they may die of respiratory failure. The routine treatment of asthma persistence is: removal of lure