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Updated: Jun 2, 2026

Conducting Respiratory Oscillometry in an Outpatient Setting
Published on: April 8, 2022
Reference values for respiratory system impedance using impulse oscillometry in healthy preschool children
Jye Hae Park1, Jung Won Yoon, Youn Ho Shin
1Department of Pediatrics, CHA Bundang Medical Center, CHA University, Seongnam, Gyeonggi-do, Korea.
This study establishes normal lung function reference values for Korean preschool children using impulse oscillometry (IOS). These findings aid in diagnosing and monitoring respiratory conditions in this age group.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
- Biostatistics
Background:
- Impulse oscillometry (IOS) is crucial for assessing lung function in children.
- Existing IOS reference values vary by ethnicity, with a lack of data for Korean preschool children.
- Establishing ethnic-specific reference values is essential for accurate clinical interpretation.
Purpose of the Study:
- To determine normal ranges for impulse oscillometry (IOS) parameters in healthy Korean preschool children.
- To provide essential reference data for pediatric respiratory health assessments in Korea.
Main Methods:
- 133 healthy Korean preschool children (aged 3-6 years) participated.
- Lung function tests were conducted using impulse oscillometry (IOS).
- Regression analyses identified predictors (age, height, weight) for IOS parameters (Rrs, Xrs).
Main Results:
- Data from 119 children were analyzed (89.5% success rate).
- Height was the primary predictor for respiratory resistance (Rrs) and reactance (Xrs).
- Regression equations were derived for boys and girls, detailing relationships between IOS values and physical parameters.
Conclusions:
- This study presents the first reference values for IOS measurements in normal Korean preschool children.
- These established norms will facilitate the diagnosis and management of respiratory diseases in this population.
- The findings support improved clinical decision-making for pediatric respiratory care in Korea.
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