1. Respiratory reactance in children aged three to five years with postinfectious bronchiolitis obliterans is higher than in those with asthma.
- Author
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Lee E, Yoon J, Cho HJ, Hong SJ, and Yu J
- Subjects
- Bronchiolitis Obliterans microbiology, Bronchodilator Agents administration & dosage, Bronchodilator Agents pharmacology, Case-Control Studies, Child, Preschool, Diagnosis, Differential, Female, Humans, Lung drug effects, Male, Oscillometry, Respiratory Function Tests methods, Asthma diagnosis, Asthma physiopathology, Bronchiolitis Obliterans diagnosis, Bronchiolitis Obliterans physiopathology, Lung physiopathology
- Abstract
Aim: We investigated airway function in preschoolers with postinfectious bronchiolitis obliterans (PIBO) using impulse oscillometry (IOS)., Methods: This study enrolled 182 children aged three to five years: 12 with PIBO, 135 with asthma and 35 nonatopic controls. Respiratory resistance and reactance were assessed using IOS., Results: The percentage predicted (% predicted) of prebronchodilator respiratory resistance at 5 Hz was significantly higher in children with PIBO (177.9 ± 118.4%) than the asthma (126.1 ± 30.5%, p = 0.013) or control (121.1 ± 21.8%, p = 0.014) groups. After bronchodilator use, children with PIBO did not reach the values of Rrs5% predicted in the asthma and control groups. Respiratory reactance (Xrs5% predicted) in children with PIBO (337.1 ± 478.5%) was significantly higher than both asthma (130.0 ± 80.0%, p = 0.004) and control (105.1 ± 30.8%, p < 0.001) groups before bronchodilator use and significantly higher than the two groups after bronchodilator use (p = 0.010 and p = 0.004, respectively). The changes in Rrs5 and Xrs5 were not significantly different between the children with PIBO and asthma., Conclusion: Measuring Rrs5 and Xrs5 before and after bronchodilator use may help to discriminate PIBO from asthma in children aged three to five years with chronic or recurrent respiratory symptoms., (©2016 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.)
- Published
- 2017
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