Article Type

Original Study


Objective The aim of this study was to determine the use of impulse oscillometry in the evaluation of children with asthma and to analyze lung parameters, order effect, and utility, compared with spirometry. Background Asthma is a disease characterized by ongoing inflammation of the airway, overproduction of mucus, and airway constriction due to tightened muscles, which results in permanent structural changes in the lungs, a condition often called airway remodeling. In turn, these changes usually lead to accelerated declines in lung function, including irreversible decreases in airflow because of narrowed air passages. The Impulse Oscillometry System measures respiratory impedance using short pulses (impulses) of air pressure. Impulse oscillometry has been used with success to assess lung function in healthy and asthmatic children, as well as in adolescents. Materials and methods This case-control study was carried out on 66 children divided into two groups: group 1 included 46 children who were previously diagnosed as asthmatic, and group II (control group) included 20 children without a history of asthma. All studied children were subjected to full history taking; clinical evaluation, including general examination and local chest examination; pulmonary function testing; impulse oscillometry before and after spirometry. Pulmonary function testing (impulse oscillometry and spirometry) was repeated in group 1 after bronchodilator administration. Results Asthma prevalence was increased among children with a family history of atopy and among those with family members who smoked. Postbronchodilator impulse oscillometry results were significant, especially R5% and X5pred.-X5. Performing forced expiratory maneuvers during spirometry causes a marked decrease in lung function, detected using impulse oscillometry. Conclusion Impulse oscillometry is useful in the evaluation of children with asthma.