1~3岁哮喘患儿呼出气一氧化氮水平与外周血嗜酸性粒细胞计数及肺功能的相关性

目的 探讨1~3 岁哮喘(AS)患儿呼出气一氧化氮(FeNO)水平,分析其与肺功能、外周血嗜酸粒细胞(EOS)计数的相关性。方法 111 例1~3 岁AS 患儿纳入该研究,根据症状分为两组:AS 急性期组(n=62)及AS 缓解期组(n=49),对所有患儿进行FeNO、肺功能及外周血EOS 计数检查。另选60 例同龄健康儿童作为对照组。结果 AS 急性期组患儿FeNO 水平(中位数24.4 ppb)高于AS 缓解期组(18.0 ppb)及对照组(13.7 ppb),AS 缓解期组高于对照组(P<0.05)。FeNO 值与肺功能参数(PEF、TEF75、TEF50、TEF25)及外周血EOS 计数均无显著相关性(P>0.05)。结论 测定FeNO 水平可以辅助评价1~3 岁AS 患儿AS 的控制水平,但FeNO水平与肺功能及外周血EOS 计数无关。

Correlation of fractional exhaled nitric oxide with peripheral blood eosinophils and lung function in 1-3-year-old children with asthma

Objective To examine fractional exhaled nitric oxide (FeNO) values in 1-3-year-old children with asthma and analyze the correlation of FeNO with peripheral blood eosinophils (EOS) and lung function in these children. Methods A total of 111 children aged 1-3 years with asthma were enrolled. The children were classified into acute exacerbation (n=62) and remission groups (n=49) according to their symptoms. FeNO values, lung function, and peripheral blood EOS count were measured in these children. Sixty age-matched healthy children were enrolled as the control group. Results FeNO values were significantly higher in the acute exacerbation group (24.4 ppb) than in the remission group (18.0 ppb) and the control group (13.7 ppb) (P<0.05). The FeNO values in the remission group were significantly higher than in the control group (P<0.05). FeNO values were not significantly correlated with peripheral blood EOS count and lung function parameters (PEF, TEF25, TEF50, and TEF75) . Conclusions Measurement of FeNO is useful to evaluate the disease activity in children with asthma aged 1 to 3 years, but the FeNO values are not correlated with peripheral blood EOS count and lung function.