哮喘患儿呼出气一氧化氮水平与肺功能相关性研究

目的 探讨处于稳定期哮喘患儿呼出气一氧化氮水平(FeNO)与肺功能中第一秒用力呼气容积(FEVl)的相关性.方法 选取2009年2月至2009年7月于中国医科大学附属盛京医院小儿哮喘门诊就诊的5～14岁的稳定期哮喘患儿53例,根据其是否应用吸入糖皮质激素规范化治疗分为激素治疗组和非激素治疗组,分别测定其FeNO水平和肺功能,分析FeNO水平和肺功能在两组患儿之间是否存在统计学差异,并比较两组患儿FeNO水平和肺功能指标是否存在相关性.结果 非激素治疗组患儿FeNO水平明显高于激素治疗组,且差异有显著性(P=0.005).激素治疗组患儿FEV1平均值为(95.152±8.993)%,非激素治疗组患儿FEVl平均值为(91.350±11.690)%,两组差异无显著性(P=0.932).非激素治疗组患儿FeNO水平与FEV1呈显著负相关性(r=-0.465,P=0.039).激素治疗组哮喘患儿FcNO水平与FEV1参数不相关(r=0.058,P=0.747).结论 处于稳定期的哮喘患儿,未应用吸入糖皮质激素规范化治疗时,其FeNO水平明显高于已用激素规范治疗患儿,测定FeNO水平可以作为一项很好的指标来评价哮喘患儿的气道炎症.     

呼出气一氧化氮在儿童支气管哮喘诊治中的应用进展

支气管哮喘是以慢性气道炎症为主要特征的常见呼吸系统疾病.近年来,呼出气一氧化氮作为无创性气道炎症的评估检测方法,广泛应用于判断气道炎症性质、确定糖皮质激素治疗的反应性、临床诊断及鉴别诊断、调整激素治疗、判断预后等.该文对呼出气一氧化氮在儿童喘息及相关疾病的研究进展、产生及作用、正常值标准、临床应用等方面进行综述.     

哮喘儿童呼出气一氧化氮与肺功能及哮喘控制测试相关性研究

目的 探讨哮喘儿童呼出气一氧化氮（FeNO）水平与肺功能、哮喘控制测试（ACT）三者间的相关性及其在哮喘病情评估中的临床意义。方法 以2011年5月至2012年1月于中国医科大学附属盛京医院小儿哮喘门诊就诊的136例5～15岁哮喘儿童为研究对象,分别测定其FeNO水平、肺功能和ACT评分,分析三者间是否存在相关性。结果 FeNO水平与ACT评分水平呈负相关（r=-0.251,P＜0.005）。FeNO水平与肺功能FEV1/FVC（第1秒用力呼气容积/用力肺活量）呈负相关（r=-0.206,P＜0.05）,与FEV1及PEF不相关。ACT评分与肺功能FEV1/FVC呈正相关（r=0.242,P＜0.01）,与FEV1及PEF不相关。结论 针对所有研究对象,哮喘儿童FeNO水平与ACT评分呈负相关,与FEV1/FVC呈负相关, ACT与肺功能FEV1/FVC呈正相关,然而分组研究后,三者不具备稳定的相关性。FeNO评估哮喘儿童气道炎症,ACT评估哮喘患儿疾病控制水平,肺功能评价哮喘患儿气道阻塞情况,三者是从儿童哮喘的不同方面进行评估,互为补充,均具有重要临床意义,共同应用可提高儿童哮喘控制及诊治水平。     

肺功能检查及呼出气一氧化氮在儿童支气管哮喘规范化管理中的应用

目的探讨肺功能与呼出气一氧化氮(FeNO)在儿童支气管哮喘规范化治疗过程中的变化及意义。方法选取254例初诊、急性发作期的支气管哮喘患儿作为研究对象,按照有无合并过敏性鼻炎分为合并鼻炎组与未合并鼻炎组,并以62例健康儿童作为对照组。哮喘患儿均给予规范化治疗,于治疗初始以及治疗3、6、9、12个月复查肺功能及FeNO水平;对照组测定一次肺功能和FeNO。结果规范治疗1年中第1秒用力呼气容积(FEV1)、最高呼气流速(PEF)、最大呼气中段流量(MMEF),以及最大呼气25%、50%及75%肺活量的瞬间流速(MEF25、MEF50、MEF75)均逐渐升高,FeNO水平逐渐降低(P0.05)。治疗6个月后PEF、FEV1等大气道功能指标基本恢复;9个月后MMEF、MEF25、MEF50、MEF75等小气道功能指标基本恢复;1年后大小气道功能指标与对照组的差异均无统计学意义(P0.05),而FeNO水平仍高于对照组(P0.05)。治疗初始及3个月时,合并鼻炎组的哮喘患儿FeNO均高于未合并鼻炎组(P0.05)。治疗初始FeNO水平与肺功能各项指标均存在负相关(P0.05)。结论哮喘儿童的规范化治疗过程中,肺功能参数逐渐升高,FeNO水平逐渐下降,大气道功能的恢复早于小气道功能,另外也要注意鼻炎对气道反应性的影响。     

呼出气一氧化氮浓度测定在儿童支气管哮喘和咳嗽变异性哮喘中的诊断价值

目的 分析呼出气一氧化氮(FeNO)对于支气管哮喘和咳嗽变异性哮喘的诊断价值,并探讨能否应用FeNO区分支气管哮喘和咳嗽变异性哮喘。方法 选取2012年6月至2014年6月150例初诊为支气管哮喘的患儿以及120例初诊为咳嗽变异性哮喘的患儿为研究对象,对两组患儿进行FeNO检测、肺功能检查以及支气管激发试验;同期选取150例健康儿童为对照组,对对照组儿童行FeNO检测。采用受试者工作特征曲线(ROC)分析FeNO对于支气管哮喘和咳嗽变异性哮喘的诊断价值。结果 支气管哮喘和咳嗽变异性哮喘组患儿的FeNO值均高于对照组(P< 0.01),支气管哮喘组的FeNO值显著高于咳嗽变异性哮喘组(P< 0.01);支气管哮喘组FEV1/FVC%、FEV1%pred、PD20较咳嗽变异性哮喘组均降低(P< 0.01)。FeNO诊断支气管哮喘的最佳阈值为19.5 ppb,敏感度为83.3%,特异度为86.7%;FeNO诊断咳嗽变异性哮喘的最佳阈值为15.5 ppb,敏感度为67.5%,特异度为78.0%;FeNO区别支气管哮喘和咳嗽变异性哮喘的最佳阈值为28.5 ppb,敏感度为60.7%,特异度为82.5%。结论 FeNO测定可用于支气管哮喘和咳嗽变异性哮喘的诊断和鉴别诊断。     

哮喘儿童连续性监测呼出气一氧化氮水平的临床意义

目的：探讨哮喘儿童呼出气一氧化氮水平（FeNO）的变化特点及临床意义。方法：20例在哮喘专科就诊的的轻-中度哮喘患儿,分別在治疗后8周、16周、24周、32周、40周进行随访。随访时记录哮喘症状,检测肺功能及FeNO。结果：治疗8周后FeNO均值迅速下降,后逐渐缓慢下降。与治疗前比较,治疗8周、16周、24周、32周及40周后的FeNO均值显著降低,差异有统计学意义（P＜0.01）。急性发作时FeNO水平较发作前明显增高,待病情缓解后FeNO水平随之快速下降。相关性分析显示FeNO与第1秒用力呼气容积（FEV1）呈负相关(r=-0.193,P＜0.05)。受试者工作曲线提示当FeNO为35.5 ppb时,FeNO预测哮喘未控制的敏感性为87.9%,特异性是80%;FeNO为20.5 ppb时,敏感性为97%,特异性为27.1%。结论：动态监测FeNO可以用于判断哮喘儿童气道炎症的控制水平;当FeNO值小于20.5 ppb时气道炎症可能控制良好,而当大于35.5 ppb时气道炎症很有可能处于未控制状态;FeNO的急性增高提示患儿有急性发作的可能。     

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

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.     

肺泡呼出气一氧化氮在儿童肺疾病中的应用进展

呼出气一氧化氮被认为是气道炎症的生物标志物,其中表征小气道炎症的肺泡呼出气一氧化氮(alveolar exhaled nitric oxide,CaNO)越来越多地被应用于呼吸系统疾病中。CaNO不仅可以应用于儿童支气管哮喘严重程度的评估、治疗方案的选择以及治疗效果的动态监测,还可以应用于间质性肺疾病的早期诊断及肺损害...     

IgE介导的哮喘患儿呼出气一氧化氮水平与气道可逆性的相关性

目的 探讨IgE介导的哮喘患儿呼出气一氧化氮（FeNO）与气道可逆性的相关性。方法 选取2016年9月至2018年8月初诊为哮喘急性发作的6~14岁患儿86例为研究对象,根据血清特异性IgE结果分为IgE介导组（n=61）及非IgE介导组（n=25）,根据过敏原检测结果将IgE介导组进一步分为1、2、3种和4种及以上过敏原阳性组。检测FeNO水平及支气管舒张试验前后常规通气肺功能指标,采用Pearson相关性分析对FeNO与肺功能各项指标进行相关性分析。结果 IgE介导组的FeNO水平明显高于非IgE介导组（P < 0.05）;FeNO水平随着血清特异性过敏原阳性种类的增加而增加（P < 0.05）;IgE介导组FeNO与支气管舒张试验用药前后第1秒末用力呼气量（FEV1）的改变量（△FEV1）和改善率（△FEV1% pred）呈正相关（分别r=0.655、0.473,P < 0.05）,而与FEV1、FEV1占预计值百分比（FEV1% pred）、呼气峰流速（PEF）、用药前后PEF的改变量（△PEF）和改善率（△PEF% pred）、PEF占预计值的百分比（PEF% pred）无相关性（P > 0.05）;非IgE介导组FeNO与上述指标均无相关性（P > 0.05）。结论 FeNO水平与过敏程度有关;对于IgE介导的哮喘患儿,FeNO水平与气道可逆性存在正相关,对哮喘的诊断、评估病情及了解气道可逆性有一定价值;对于非IgE介导的哮喘患儿,FeNO则不适用于间接了解其气道可逆性,两者需区别对待。     

上下气道呼出气一氧化氮与哮喘控制水平的相关性研究

目的 探讨联合检测呼出气一氧化氮（FeNO）及鼻呼出气一氧化氮（FnNO）的临床价值及其与哮喘控制水平的关系。方法 选取2018年1~6月诊断为哮喘并处于慢性持续期的患儿120例为研究对象。所有患儿进行儿童哮喘控制测试（C-ACT）,得分 > 23分为控制组,20~23分为部分控制组,≤ 19分为未控制组,每组各40例;同时依据哮喘患儿有无合并过敏性鼻炎分为未合并鼻炎组（n=55）和合并鼻炎组（n=65）;同期收集健康体检儿童40例为对照组。哮喘患儿及对照组儿童均检测FeNO与FnNO水平。结果 不同水平控制组内FeNO值以未控制组最高,部分控制组其次,控制组最低（P < 0.05）,其中未控制组及部分控制组FeNO值高于对照组（P < 0.05）;未控制组与部分控制组FnNO值高于完全控制组及对照组（P < 0.05）,完全控制组FnNO值高于对照组（P < 0.05）。合并鼻炎组FeNO与FnNO值均高于未合并鼻炎组（P < 0.05）。结论 FeNO可用来评估哮喘控制情况,与FnNO联合可评估上下气道炎症情况,为上下气道联合治疗提供依据。     

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??Objective To explore the change of exhaled nitric oxide ??eNO?? in children from community and its importance in asthma management. Methods The study was conducted from October 2011 to December 2011. Totally 133 non-asthmatic children and 94 asthmatic children aged 7~12 years old from elementary schools in Beijing Xicheng District were included in the study. The eNO?? skin prick test ??SPT???? lung function and physical examination were carried out and information of medical history was collected in all children. The eNO level between non-asthmatic children and asthmatic children?? and its association with atopy?? rhinitis?? lung function and asthma control were analyzed. Results eNO levels of non-asthmatic children and asthmatic children were 11.63±1.88 ppb?? and 19.68±2.31 ppb respectively and the difference between them was statistically significant ??P<0.01??. In non-asthmatic children?? the level of eNO in children with rhinitis was significantly higher than in children without rhinitis ???17.49±2.02??×10-9 vs. ??10.42±1.76??×10-9?? P<0.01?? and eNO level in atopic children was higher than non-atopic children ???23.06±2.18??×10-9 vs. ??9.60±1.66??×10-9?? P<0.01??. In asthmatic children?? the difference in eNO level was not significant in children with rhinitis and without rhinitis ???19.58±2.34??×10-9 vs. ??20.09±2.25??×10-9??? but the eNO levels in atopic children ??23.06±2.18??×10-9 was significantly higher than non-atopic children ???8.75±1.86??×10-9?? P<0.01??. The level of eNO of uncontrolled asthmatic children was significantly higher than controlled asthmatic children ???25.09±2.31??×10-9 vs. ??17.21±2.22??×10-9?? P<0.05??. There was no significant difference in eNO level between children who used and those who did not use inhaled corticosteroid. The eNO level was not related to lung function parameters either in non-asthmatic or in asthmatic children. Conclusion The eNO level increases significantly in children with asthma or rhinitis and is associated with asthma control status. Atopy is an important factor on eNO level as well. Measuring eNO level would help improve the diagnosis of asthma and atopy and management of asthma and rhinitis in children from community.     

NOS1 polymorphism is associated with atopy but not exhaled nitric oxide levels in healthy children

Exhaled nitric oxide (FE_NO) is raised in atopy. The mechanism for this is unclear. The aim of this study was to investigate whether the number of AAT repeats in intron 20 of the NOS1 gene, recently associated with variations in FE_NO in adults with asthma and cystic fibrosis, was associated with the raised FE_NO in healthy atopic children. Eighty-seven healthy children (44 girls, 42 atopic, age range 6–18 years) underwent measurements of FE_NO, spirometry, airway responsiveness and skin prick testing. Genotyping was carried out to determine the number of AAT repeats. There was no association between the number of AAT repeats and FE_NO in either the whole sample of healthy children (n = 87) or in the subsample of healthy atopics (n = 42). However, a greater number of atopic children had two high repeat alleles compared with non-atopic children (33.3% vs. 13.6%, respectively, p = 0.03). This suggests that variations in the NOS1 gene may contribute to atopy without this relationship being reflected by FE_NO.     

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目的通过对哮喘儿童呼出气一氧化氮(FENO)水平的监测,为哮喘的临床诊断治疗及病情评估提供帮助。方法选择2007年10月至2009年8月于首都儿科研究所附属儿童医院门诊确诊的哮喘患儿共358例,根据其哮喘发作与治疗情况分为哮喘发作组与非发作组、治疗组与未治疗组。设计临床观察表记录各组患儿治疗、发作、肺部喘鸣音情况,并进行FENO及1秒用力呼气容积(FEV1)、用力肺活量(FVC)及最大用力呼气中段流量(MMEF)等肺功能指标的测定。结果 358例哮喘患儿的FENO值为28.5(15.5～55.0)×10-9,其中男性为29.0(15.0～49.8.0)×10-9,女性为28.0(16.0～58.6)×10-9,男女相比差别无统计学意义(Z=-1.006,P>0.05)。111例11岁以上哮喘儿童FENO为36.0(20.0～65.0)×10-9,其中男性为30.0(26.0～63.0)×10-9,女性为40.5(17.7～73.8)×10-9,与395例正常儿童相比FENO明显增高,差异具有统计学意义(Z=-11.352,P<0.001)。358例哮喘患儿FENO与年龄呈正相关(r=0.206,P<0.01)...     

Exhaled nitric oxide and exercise-induced bronchoconstriction in young wheezy children – interactions with atopy

The association between exercise-induced bronchoconstriction (EIB) and exhaled nitric oxide (FE_NO) has not been investigated in young children with atopic or non-atopic wheeze, two different phenotypes of asthma in the early childhood. Steroid naïve 3- to 7-yr-old children with recent wheeze (n = 84) and age-matched control subjects without respiratory symptoms (n = 71) underwent exercise challenge test, measurement of FE_NO and skin prick testing (SPT). EIB was assessed by using impulse oscillometry, and FE_NO by standard online technique. Although FE_NO levels were highest in atopic patients with EIB, both atopic and non-atopic wheezy children with EIB showed higher FE_NO than atopic and non-atopic control subjects, respectively. In atopic wheezy children, a significant relationship between FE_NO and the severity of EIB was found ( r  = 0.44, p = 0.0004), and FE_NO was significantly predictive of EIB. No clear association between FE_NO and EIB or predictive value was found in non-atopic wheezy children. Both atopic and non-atopic young wheezy children with EIB show increased FE_NO levels. However, the association between the severity of EIB and FE_NO is present and FE_NO significantly predictive of EIB only in atopic subjects, suggesting different interaction between bronchial responsiveness and airway inflammation in non-atopic wheeze.     

Consistently high levels of exhaled nitric oxide in children with asthma

Background: Exhaled nitric oxide (eNO) levels in children are unstable because they are regulated by many potent factors. The purpose of the current study was to evaluate the reliability of eNO levels between a long interval and other lung functions in normal and asthmatic children. Methods: Eighty‐three elementary school children (aged 11–12 years; male : female, 39 : 44) participated in this study. Lung function, airway resistance and eNO levels were measured twice: the first measurement was in autumn 2007, and the second was one year later. Results: There were 62 non‐asthmatic control children (male : female, 31 : 31) and 21 asthmatic children (male : female, 8 : 13). In both the first and the second examination, the levels of eNO in children with asthma were higher than those in children without asthma. The parameters of lung function and the respiratory resistance in children without asthma showed a good correlation between the results of the first and second examinations. The eNO level in non‐asthmatic children showed a good correlation between the two. On the other hand, the peripheral airway parameters of lung function and the respiratory resistance in children with asthma were not correlated between the first and the second examinations. The eNO level in these patients was well correlated between the two examinations. Conclusions: These data suggest that the eNO level showed good reproducibility in children with and without asthma. The eNO level is therefore considered to be a useful marker for reproducibly evaluating a subject's airway condition.     

呼出气一氧化氮检测在幼儿支气管哮喘中的应用分析

目的分析各期支气管哮喘(AS)幼儿的呼出气一氧化氮(FeNO)浓度变化,探讨FeNO浓度与AS分期的相关性。方法选取2014年4~6月初次诊断为AS且处于急性发作期的1~3岁患儿58例为研究对象,依据治疗后病情转归情况分为慢性持续期(n=34)及临床缓解期(n=24),以同龄健康儿童30例为对照,对所有儿童行FeNO浓度、肺功能等检测。分析FeNO浓度与AS分期的相关性。利用受试者工作特征(ROC)曲线分析FeNO诊断AS的最佳诊断截点。结果各期AS患儿FeNO浓度均高于对照组儿童(P0.05)。急性发作期患儿Fe NO浓度高于慢性持续期和临床缓解期,且慢性持续期患儿FeNO浓度高于临床缓解期(均P0.05)。AS患儿FeNO浓度水平与AS分期相关(r=-0.382,P0.05)。ROC曲线分析显示FeNO诊断AS的最佳诊断截点为22.75 ppb,敏感度达0.933,但特异度仅为0.388。结论 AS幼儿FeNO浓度水平与AS分期相关;Fe NO浓度22.75 ppb可作诊断幼儿AS的界值。     

Exhaled nitric oxide in healthy children: Variability and a lack of correlation with atopy

Nitric oxide (NO) is a free radical produced by several lung cells via the enzyme nitric oxide synthetase (NOS) and can be easily measured in exhaled air by chemiluminescence analysis. As the iso-enzyme iNOS may be induced by cytokines and endotoxin, NO is elevated in several chronic inflammatory airway diseases. Prior to using exhaled nitric oxide (eNO) as a non-invasive marker of airway inflammation in daily routine, the role of possibly influencing factors such as age, time of the day, smoking exposure and intra-individual variability have to be clarified. NO concentrations were measured in 107 healthy children aged 4–18 years at an expiratory flow of 184 ml/s. Spirometry and a skin-prick test were performed and a questionnaire on family history of atopy, personal symptoms of atopic disease and smoke exposure was completed. For intra-individual variability nitric oxide was measured in six children three times daily on 6 consecutive days. Median eNO concentration was 5.7 p.p.b., and increased significantly with age but did not vary with gender. No correlation was found between eNO and smoke exposure, positive skin-prick test, FEV ₁, MEF₂₅ and time of the day. There was no circadian rhythm found in the six children measured on 6 consecutive days, but the eNO showed an intra-individual coefficient of variation of 25.9%. With the help of a two-compartment model of the lung the alveolar NO concentration was estimated to be 4.1 p.p.b and was shown to be constant with age, whereas the airway part of NO steadily increased with age. When comparing eNO values with standardized measurement techniques, the age of the children and the large intra-subject coefficient of variation have to be taken into account, whereas in healthy children subject-specific factors such as atopic history, gender and skin test reactivity did not affect eNO measurement.     

毛细支气管炎患儿呼出气一氧化氮检测应用价值

目的探讨毛细支气管炎患儿呼出气一氧化氮(FeNO)检测的意义及应用价值。方法以2018年1至9月收治的49例初发毛细支气管炎住院患儿为研究对象,根据呼吸道合胞病毒(RSV)检测结果分为RSV组(27例)和非RSV组(22例);另选取同期同年龄健康体检儿童17例作为健康对照组。对各组进行潮气呼吸法呼出气一氧化氮检测,RSV组和非RSV组患儿在缓解期(1～2周)和恢复期(4～6周)再次检测,比较检测结果。结果 RSV组、非RSV组以及健康对照组间性别、年龄差异无统计学意义(P0.05)。RSV组及非RSV组FeNO水平在急性期、缓解期和恢复期间的差异均有统计学意义(P0.05)。在恢复期,FeNO水平在RSV组、非RSV组和健康对照组间的差异有统计学意义(P0.05),以RSV组FeNO水平最高。在急性期和缓解期,FeNO水平在三组间的差异无统计学意义(P0.05)。结论毛细支气管炎(包括RSV感染和非RSV感染)患儿在急性期和缓解期的FeNO水平与健康同龄儿童无差异,在恢复期高于健康同龄儿童。     

Daily ambulatory exhaled nitric oxide measurements in asthma

Exhaled NO (FENO) is a non-invasive, validated marker for asthmatic airway inflammation. Recently, a new hand-held NO-analyzer has been developed which makes it possible to monitor FENO at home. We assessed feasibility and analyzed variability of daily FENO home measurements. Twenty-one asthmatics (mean age 14.5 yr; range 8-25 yr) participated. Nineteen used a stable dose of inhaled corticosteroids and all of them were in a stable clinical condition. FENO was measured twice daily for 14 consecutive days. Measurements and symptom scores were recorded on a smart card in the analyzer. Symptom score items included well-being, wheeze, activity, and nocturnal symptoms. Measurements showed a success rate of 93%. We found a significant diurnal variation in FENO with geometric mean morning levels 14% higher than evening levels (95% CI: 4%-25%; p = 0.013). Individual subjects showed marked fluctuation of FENO. The mean intrasubject coefficient of variation of FENO was 40% for morning and 36% for evening values. FENO and cumulative symptom scores did not correlate. Home FENO measurements are feasible, and offer the possibility to asses airway inflammation on a daily basis. Further study is needed to interpret and evaluate possible benefits of FENO home monitoring.