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目的 :观察呼气末正压 (PEEP)对重症哮喘患者的治疗作用.方法 :通过观察不同水平PEEP对重症哮喘患者气道压力和动脉血氧分压 (PaO2 )及二氧化碳分压 (PaCO2 )的影响 ,明确PEEP对重症哮喘的治疗作用.结果 :应用PEEP后患者呼吸困难明显好转 ,气道阻力明显降低 (P“,”Objective:To observe the therapeutical action in severity asthma with PEEP. Methods:By observing the effect of airway pression and PaO 2, PaCO 2, to define therapeutical action with PEEP in patients of severity asthma.Results:Decompensation was clearly straightened, the airway pression declined remarkably( P