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Lung India Official publication of Indian Chest Society  
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ORIGINAL ARTICLE
Year : 2021  |  Volume : 38  |  Issue : 3  |  Page : 229-235

Assessment of airway reversibility in asthmatic children using forced oscillation technique – A single-center experience from North India


Department of Pediatrics, Division of Pediatric Emergency, Critical Care, Pulmonology and Allergic Disorders, Institute of Child Health, Sir Ganga Ram Hospital, New Delhi, India

Correspondence Address:
Dr. Neeraj Gupta
Department of Pediatrics, Division of Pediatric Emergency, Critical Care, Pulmonology and Allergic Disorders, Institute of Child Health, Sir Ganga Ram Hospital, Rajinder Nagar, New Delhi - 110 060
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/lungindia.lungindia_354_20

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Background: Lung function testing is recommended for the management of asthma. Due to certain limitations of conventional spirometry in vulnerable patients, forced oscillation technique (FOT) has been studied with promising results. As there is a paucity of data from developing world, we planned to conduct this study in children using FOT. To assess airway reversibility after inhaled salbutamol in asymptomatic children with suspected asthma. Settings: This study was conducted at pediatric asthma clinic of a tertiary care referral hospital in North India. Design: This was a prospective interventional study over 1-year period. Subjects and Methods: Asymptomatic children between 2 and 18 years of age, with history suggestive of asthma, were eligible for participation. Baseline and postbronchodilator pulmonary functions were assessed using FOT. Airway resistance and reactance were monitored at various frequencies. SPSS version 17 was used for statistical analysis. Results: Among the 345 enrolled children, baseline mean ± standard deviation total airway resistance (R5), central airway resistance (R19), peripheral airway resistance (R5–R19), reactance (X5), and resonant frequency (Fres) were 6.85 ± 2.60, 5.23 ± 1.93, 1.6 ± 1.16, and − 2.54 ± 1.36 cmH2O/L/s and 17.28 ± 3.06 Hz. The median (interquartile range) percentage change after inhaled salbutamol was 19.9 (11.40, 29.12), 22.86 (6.88, 38.76), 14.08 (3.40, 22.62), 39.20 (8.20, 62.39), and 15.79 (8.33, 27.27) in respective parameters. All changes were statistically significant. The studied respiratory variables were in maximum negative correlation with height, followed by body mass index. Conclusions: FOT is a simple technique for monitoring lung functions in children during asthma management.


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