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Updated: Jun 8, 2025
Conducting Respiratory Oscillometry in an Outpatient Setting
Published on: April 8, 2022
Baseline Impulse Oscillometry Metrics Differentiate Asthmatic Children From Non-Asthmatic Children Across
Iris Kim1, Hye-Won Shin2, Stanley Galant3,4
1Division of Basic and Clinical Immunology, Department of Medicine, University of California, Irvine, California, USA.
Insights
Early identification of childhood asthma is crucial. Baseline impulse oscillometry (IOS) effectively detects asthma in children across various ethnicities and age groups by measuring airway resistance and reactance.
Area of Science:
- Pediatric Pulmonology
- Respiratory Medicine
- Diagnostic Tools
Background:
- Early asthma identification is vital to prevent irreversible airway remodeling and disease progression.
- Impulse oscillometry (IOS) shows variable effectiveness in diagnosing childhood asthma in existing studies.
- This study addresses the need for a definitive assessment of IOS in pediatric asthma diagnosis.
Purpose of the Study:
- To conduct a meta-analysis on pediatric impulse oscillometry (IOS) studies.
- To determine significant peripheral airway differences between asthmatic and non-asthmatic children across ethnicities.
- To establish the utility of baseline IOS as a diagnostic tool for asthma in children.
Main Methods:
- Comprehensive literature search of pediatric oscillometric studies.
- Inclusion of studies with younger (4.3-6 years) and older (8.7-11.4 years) children.
- Analysis focused on resistance at 5 Hertz (R5) in controlled and asthmatic subjects, excluding uncontrolled asthma cases.
Main Results:
- Asthmatic children exhibited significantly higher R5 and area of reactance (AX) compared to healthy controls.
- Asthmatic children demonstrated significantly lower reactance at 5 Hertz (X5).
- These findings were consistent across both younger and older children and various countries.
Conclusions:
- Baseline impulse oscillometry (IOS) metrics (resistance and reactance) are effective diagnostic tools for identifying asthma in children.
- IOS demonstrates consistent efficacy across different age groups and ethnicities/races evaluated.
- This meta-analysis confirms IOS as a valuable method for early asthma detection in pediatric populations.
Introduction:
Identifying the asthmatic early to prevent permanent airway remodeling and the progression of the disease is desirable. In children, baseline impulse oscillometry has been found effective in identifying asthma in some studies but not others.
Objective:
The purpose of our study was to utilize a meta-analysis to determine whether there were significant peripheral airway differences between asthmatic and non-asthmatic children across ethnicity/race, utilizing baseline impulse oscillometry (IOS) to establish its usefulness as a diagnostic tool in this age group.
Methods:
This was a comprehensive search of published literature on pediatric oscillometric studies evaluating younger children (mean age ranging from 4.3 to 6 years) and older children (mean age ranging from 8.7 to 11.4 years) from the United States, Europe, Asia, and Middle East. Inclusion criteria required the primary variable resistance at 5 Hertz (R5) (kPa/L/s) or (cmH2O/L/s) for both control and asthmatic subjects, and excluded studies if asthmatics had uncontrolled disease.
Results:
Our data show that there are significantly higher R5 and area of reactance (AX) and lower reactance at 5 Hertz (X5) in both younger and older asthmatic children compared to healthy controls from various countries.
Conclusions:
This meta-analysis firmly establishes that baseline oscillometry metrics, resistance and reactance, are effective in identifying the asthmatic child across age and the ethnicities/races evaluated.
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