Objective To study the clinical significance and changes of plasma nitric oxide (NO) and cyclic adernosine monophosphate(cAMP)/cyclic guanosine monophosphate(cGMP) ratio in children with asthma.

• 目的 研究支气管哮喘患儿血浆一氧化氮 (NO)、环磷酸腺苷 (cAMP) /环磷酸鸟苷 (cGMP)比值变化及其临床意义。