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KMID : 0854720080280040271
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Korean Journal of Asthma, Allergy and Clinical Immunology
2008 Volume.28 No. 4 p.271 ~ p.276
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Short-Term Variations in Impulse Oscillation System Parameters
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Kwak Ji-Hee
Hwang Pil-Joo
Jung Hye-Young
Jung Da-Wun
Han Man-Yong
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Abstract
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Background: The impulse oscillation system (IOS) is known to be more useful than spirometry for the evaluation of pulmonary function.
Objective: The aim of this study was to compare short-term variations in spirometry and IOS parameters in healthy adults.
Method: Spirometry and IOS parameters were measured in 12 healthy adults. Their mean age was 28.7+/-3.64 years; there were 6 males and 6 females. The differences in the mean values at various time intervals were tested with repeated-measures analysis of variance (ANOVA). The coefficients of repeatability and variation were calculated for assessing the repeatability and variability.
Results: There were no statistically significant differences in the mean values of the spirometric parameters, FEV1, FVC, FEV1/FVC, FEV0.5, and PEF, and the IOS parameters, X5 and R20. In spirometry, the coefficient of repeatability on the first day was the smallest for FVC, FEV1/FVC, and MMEF. However, when IOS was used, it was the smallest only for Rf. The coefficient of variation in spirometry was the smallest for FEV1/FVC, and that in IOS was the smallest for R5 and X5.
Conclusions: The variation in IOS values is larger than that in most of the spirometry parameters. X5 is the smallest coefficient of variations and statistically significant among the IOS parameters.
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KEYWORD
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Impulse Oscillation System, Spirometry, Repeatability
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