肺炎支原体感染对哮喘儿童呼出气一氧化氮及肺功能影响的研究

The effects of mycoplasma pneumoniae infection on the exhaled nitric oxide level and lung function in asthma children

目的 探讨肺炎支原体(Mycoplasma pneumoniae,MP)感染对哮喘患儿呼出气一氧化氮(fractional exhaled nitric oxide,FeNO)和肺功能水平的影响,分析呼出气一氧化氮与肺功能的相关性,为哮喘患儿的治疗和监测提供客观依据.方法 收集2011年6月至2013年1月在中国医科大学附属盛京医院小儿呼吸内科住院及门诊5~13岁急性轻、中度发作的哮喘患儿68例,于入组次日清晨检测MP-IgG抗体、MP-IgM抗体、或者MP-DNA、血清总IgE,同时进行FeNO和肺功能检查,根据病原学检查结果将患儿分为哮喘肺炎支原体感染组(哮喘MP感染组)36例,哮喘非肺炎支原体感染组(哮喘非MP感染组)32例,对比分析两组患儿FeNO和肺功能水平的差异,并进一步分析MP感染后FeNO和肺功能相关性.结果 哮喘MP感染组患儿FeNO值较哮喘非MP感染组明显升高,MP感染激素治疗组患儿FeNO水平比非MP感染激素治疗组升高,差异有统计学意义(P<0.05);两组患儿肺功能FVC、FEV1、FEV1/Vcmax、MEF25、MEF50之间比较差异无统计学意义(P>0.05),但MEF75、PEF比较有显著性差异(P<0.05);FeNO与肺功能(FVC、FEV1、FEV1/Vcmax、MEF50、MEF25、MEF75、PEF)之间比较无明显相关性(P>0.05).结论 哮喘儿童MP感染后FeNO值明显升高,MP感染后哮喘患儿FeNO水平与肺功能无显著相关性.

Objective To investigate the effects of mycoplasma pneumoniae(MP)infection on the exhaled nitric oxide level and lung function in asthmatic children,analyze the correlation between exhaled nitric oxide level and lung function and to provide reference for the treatment and monitoring of asthmatic children.Methods Sixty-eight children aged from 5 to 13 years old with mild or moderate asthma during June 2011 to January 2013 were collected.MP-IgG antibody,MP-IgM antibody,MP-DNA,total serum IgE,FeNO measurement and spirometry were examined on the next day morning.They were divided into two groups according to the pathogen:ashtma with MP group and ashtma without MP group.Then the levels of nitric oxide level and lung function indicators between the two groups were analyzed.Results The FeNO level in ashtma with MP group was significantly higher(P<0.05).There were no differences between two groups in lung function parameters such as FVC,FEV1,FEV1 / Vcmax,MEF25 and MEF50(P>0.05),but differnces were found in MEF75 and PEF(P<0.05).No correlation was found between FeNO levels and lung function parameters(FVC,FEV1,FEV1/Vcmax,MEF50,MEF25,MEF75 and PEF).Conclusion In asthma children with MP infection,the FeNO level was significantly increased and no correlation was found between FeNO levels and lung function.