Objective To observe clinical significance and the changes of plasma nitric oxide (NO) and cAMP/cGMP ratio in children with asthma.

• 目的：研究支气管哮喘患儿血浆中一氧化氮(NO)、环磷酸腺苷(cAMP)/环磷酸鸟苷(cGMP)比值的变化与临床意义。