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Reference value of impulse oscillometry in taiwanese preschool children
Shen-Hao Lai1, Tsung-Chieh Yao1, Sui-Ling Liao2
1Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Chang Gung University, Taoyuan, Taiwan.
Insights
This study established reference equations for impulse oscillometry in healthy Taiwanese children aged 2-6 years. These lung function values aid in diagnosing respiratory issues in young children.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
Background:
- Impulse oscillometry (IO) assesses respiratory mechanics in young children.
- Limited reference values exist for Asian, particularly Chinese, preschool children.
- Need for localized IO reference data for clinical use.
Purpose of the Study:
- Develop reference equations for IO lung function measurements.
- Establish normative data for Taiwanese children aged 2-6 years.
- Facilitate clinical application and research in pediatric respiratory health.
Main Methods:
- Performed IO on 150 healthy Taiwanese children (2-6 years).
- Measured airway resistance and reactance at multiple frequencies.
- Utilized regression analysis to generate predictive equations based on age, height, weight, and gender.
Main Results:
- Body height was the primary determinant of airway resistance and reactance.
- Observed decreased airway resistance and increased reactance with increasing height.
- Regression curve for resistance at 5 Hz aligned with prior reference values.
Conclusions:
- Provided essential reference values for IO measurements in healthy Taiwanese preschool children.
- Enables expedient clinical diagnosis of respiratory diseases using IO.
- Supports future research and clinical applications in pediatric respiratory care.
Background:
Impulse oscillometry is a potential technique for assessing the respiratory mechanism-which includes airway resistance and reactance during tidal breathing-in minimally cooperative young children. The reference values available in Asian preschool children are limited, especially in children of Chinese ethnicity. This study aimed to develop reference equations for lung function measurements using impulse oscillometry in Taiwanese children for future clinical application and research exploitation.
Methods:
Impulse oscillometry was performed in 150 healthy Taiwanese children (aged 2-6 years) to measure airway resistance and reactance at various frequencies. We used regression analysis to generate predictive equations separately by age, body height, body weight, and gender. The stepwise regression model revealed that body height was the most significant determinant of airway resistance and reactance in preschool young children.
Results:
With the growth in height, a decrease in airway resistance and a paradoxical increase in reactance occurred at different frequencies. The regression curve of resistance at 5 Hz was comparable to previous reference values.
Conclusion:
This study provided reference values for several variables of the impulse oscillometry measurements in healthy Taiwanese children aged 2-6 years. With these reference data, clinical application of impulse oscillometry would be expedient in diagnosing respiratory diseases in preschool children.
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