Title: Respiratory impedance measured by forced oscillation technique in young healthy preschool children
Abstract: Respiratory impedance measured by Forced oscillation technique (FOT) has been used instead of spirometry in young children. This study was aimed to evaluate respiratory impedance in heathy preschool children. 1,053 preschool children aged 3-4 years were screened with ISAAC questionnaire. 955 children were excluded due to having positive question for ISAAC questionnaire, family history of allergy, recent lower respiratory tract infection, and environmental tobacco smoke. Respiratory impedance (resistance and reactance) was measured using FOT method (MostGragh-02; Chest M.I., Co Ltd, Tokyo, Japan). A total of 98 children were enrolled. 40 children (40.8%) were male. 90 from 98 children (91.83%) could perform the measurements with acceptable coefficient of variability. The mean (sd) of respiratory impedance parameters were respiratory resistance at 5Hz (R5): 12.62(2.33) cmH2O/L/s, respiratory resistance at 20Hz (R20): 10.16(1.93) cmH2O/L/s, R5-20: 2.46(0.77) cmH2O/L/s, reactance at 5 Hz(X5): -2.07(1.36) cmH2O/L/s, frequency of resonance (Fres): 12.5(4.47) cmH2O/L/s, and area of reactance (ALX): 12.65(12.16) kPaL-1. Significant correlation between respiratory impedance (R5, R20, X5, Fres and ALX) has been demonstrated to be correlated with height but not with weight. There was no significant difference in respiratory impedance between male and female in age-matched and height- matched data. Majority of young preschool children, aged 3-4 years, can performed FOT method. FOT could be used as a tool in diagnosis and monitoring of pulmonary disease.
Publication Year: 2017
Publication Date: 2017-02-01
Language: en
Type: article
Indexed In: ['crossref']
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