Korean J Pediatr.  2007 Sep;50(9):862-867. 10.3345/kjp.2007.50.9.862.

Reference values for respiratory system impedance using impulse oscillometry in school-aged children in Korea

• Wee YS
• Kim HY
• Jung DW
• Park HW
• Shin YH
• Han MY

• KMID: 2140815
• DOI: http://doi.org/10.3345/kjp.2007.50.9.862

Abstract

PURPOSE: The impulse oscillometry (IOS) is applicable to young children because it requires minimal cooperation and a non-invasive method to measure the mechanics of respiratory system. This study aimed to develop the reference values in school-aged children in Korea, using IOS which is a modification of forced oscillation technique (FOT).
METHODS
Measurements were performed in 92 previously untrained healthy children, aged 7 to 12 years old, using IOS. We analyzed the relationships between the data about their age, height, weight, body surface area (BSA), body mass index (BMI) and the result of IOS using the linear regression test.
RESULTS
The success rate of IOS was 92.4%. Stepwise multiple regression of resistance of respiratory system (Rrs) and reactance of respiratory system (Xrs) in natural form for age, height, weight, BSA, BMI showed that height was the most significant predictor and altogether of 5 variables explained the Rrs and Xrs most. Our regression equations at multiple frequencys were comparable to published reference values, especially about the Rrs obtained at 5 Hz.
CONCLUSION
IOS is a feasible method to measure the respiratory resistance in untrained children. We got the reference values using IOS and it seems to be useful to diagnose a variety of respiratory diseases.

Keyword

Impulse oscillometry; Lung function test; Reference values; Child; Airway resistance

MeSH Terms

Airway Resistance
Body Mass Index
Body Weight
Child*
Electric Impedance*
Humans
Korea*
Linear Models
Mechanics
Oscillometry*
Reference Values*
Respiratory Function Tests
Respiratory System*