Journal of Capital Medical University ›› 2018, Vol. 39 ›› Issue (1): 57-62.doi: 10.3969/j.issn.1006-7795.2018.01.011

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Study of fractional exhaled nitric oxide value in healthy subjects of Beijing-Tianjin-Hebei Region

Liu Chengyao1, Wang Xiangdong1, Liu Zhongyan1, Zhang Luo1,2   

  1. 1. Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Key Laboratory of Nasal Diseases, Beijing 100730, China;
    2. Department of Allergy, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
  • Received:2017-12-11 Online:2018-01-21 Published:2018-01-27
  • Supported by:
    This study was supported by National Natural Science Foundation of China (81420108009,81630023, 81570894),Changjiang Scholars and Innovative Research Team (IRT13082), Beijing Health Bureau Program for High Level Talents (2009-2-007, 2011-3-039, 2011-3-043, and 2014-3-018), Beijing Municipal Administration of Hospitals' Mission Plan (SML20150203), Beijing Scientific and Technological Overall Plan (Z171100000117002).

Abstract: Objective To establish measuring fractional exhaled nitric oxide (FeNO) provides an indication of airway inflammation and is used as an inflammatory marker for airway inflammation management. However, reference values and determinants of FeNO levels are not well defined in local healthy adults reference values in nonsmoking, healthy adults and to determine the factors related to FeNO levels in Beijing-Tianjin-Hebei regions.Methods This randomized multi-center study was carried on in twenty medical centers; 523 nonsmoking, healthy adults (male 221, female 302) were involved in the same period. FeNO was measured in healthy adults according to American Thoracic Society Guidelines (single breath online, exhalation flow 50 mL/s) with NIOX exhaled nitric oxide monitoring system (NIOX, Aerocrine AB, Sweden), and the correlation between related factors[such as:age, height, weight, body mass index (BMI), region and lung function] and FeNO level were investigated. Lung function was measured using spirometry, and atopic status was excluded based on the skin-prick test.Results FeNO normal values in healthy adults are similar compared with previous reports. The geometric mean of FeNO in 523 healthy adult was 16×10-6, and 95% confidence interval (skewed distribution) was (5-26)×10-6. FeNO correlated significantly with age, gender and regional distribution (P<0.05). However, weight, height, and BMI did not produce a significant impact on adult FeNO value (P>0.05). The normal ranges of FeNO were (5-26)×10-6 in healthy adults of our study.Conclusion The result of this study suggests that 26×10-6 seems to be the reference FeNO value in healthy adults in Beijing-Tianjin-Hebei regions. We believe that the presented FeNO reference values and the determining factors could be useful for research and clinical practice in the adult population of Beijing-Tianjin-Hebei regions. However, influencing factors such as age, gender and region must be considered.

Key words: fractional exhaled nitric oxide (FeNO), adult, gender, region, reference value

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