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极度气喘可能是呼吸系统疾病的显著特征,如慢性支气管炎(慢支)和肺气肿的“粉红气喘”型。患者有不可逆的气道阻塞伴肺部过度充气,动脉血氧分压(PO_2)几乎正常;动脉血二氧化碳分压(PCO_2)降低或正常。“青紫肿胀”型忠者,气道阻塞水平相似,但有低氧血症和 CO_2潴留,这两种类型差异的原因未明.青紫肿胀综合症患者寿命很短,而粉红气喘患者尽管有持续性气喘,却可许多年保持动脉血气体接近正常。因此,在此病未能治愈时,安全的药物对减轻气喘似有一定作用。
Extreme asthma may be a prominent feature of respiratory diseases, such as the “pink asthma” type of chronic bronchitis (chronic bronchitis) and emphysema. Patients with irreversible airway obstruction and pulmonary hyperinflation, arterial partial pressure of oxygen (PO_2) almost normal; arterial partial pressure of carbon dioxide (PCO_2) decreased or normal. “Purple swollen” loyal, airway obstruction level is similar, but there is hypoxemia and CO 2 retention, the reasons for these two types of differences is not clear .Lv purpura syndrome patients have a short life expectancy, while patients with pink asthma persistence Asthma, but can maintain arterial blood gas nearly normal for many years. Therefore, when the disease can not be cured, safe drugs may play a role in reducing asthma.