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Chronic airway inflammation is a central feature of pathology of bronchial asthma. In order to evaluate inflammatory status in asthma, examinations such as bronchoscope or induced sputum test can be done. Because of difficulty of those examinations we need non-invasive and simple measures for childhood asthma. Here we investigated eNO in childhood asthma. Twenty-six of atopic asthma, 13 non-asthmatic atopic children and 12 normal children were enrolled in this study. eNO was measured by chemiluminescence analyzer. eNO was significantly collerated with % FEV 1.0 and blood eosinophil counts (R = -0.494, R = 0.416, respectively). Geometrical mean of eNO in normal, non-asthmatic atopic, asthma without inhaled corticosteroid (ICS) and asthma with ICS was 16.3, 23.7, 71.6, 43.6 ppb, respectively. eNO was significantly higher in asthma than in normals. eNO in patients without ICS were significantly higher than in non-asthmatic atopic. We concluded that eNO might be useful marker for evaluation of airway inflammation in asthmatic children.
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