Abstract
BackgroundImpulse oscillometry (IOS) is important in diagnosing respiratory functions in non-cooperative children. Studies are rising nowadays to establish reliable reference values of IOS for children of different ethnicities. No available data about the regression equations for parameters of IOS for Egyptian children and adolescents. So, our study aimed to develop regression equations for parameters of IOS in Egyptian children and adolescents in relation to their age, weight, height, and body mass index.ResultsHeight and age affected the regression equation of impedance at 5 Hz (Z5 Hz) and resistance at 5 Hz (R5 Hz) in both males and females, resistance at 20 Hz (R20 Hz) in males and reactance at 5 Hz (X5 Hz) in females. Height affected the regression equation of R20 Hz in females, resonant frequency (Fres) in males, and the area of reactance (AX) in both males and females. While age affected the equation of X5 Hz in males and Fres in males.ConclusionsHeight and age were the most predictive values affecting the regression equation of IOS in Egyptian children and adolescents.
Highlights
Impulse oscillometry (IOS) is important in diagnosing respiratory functions in non-cooperative children
The impulse oscillometry system (IOS) is important in the diagnosis of respiratory functions in non-cooperative children [2]. It does not depend on the effort of the patients as it needs only tidal breathing, the sound waves emitted by the apparatus are superimposed on normal tidal breathing, and the disturbances in the flow and pressure are used to calculate the resistance to airflow and the reactive parameters over a wide range of frequencies
The purpose of this study was to get a reliable regression equation for Z5 Hz, resistance at 5 Hz (R5 Hz), resistance at 20 Hz (R20 Hz), X5 Hz, Resonant frequency (Fres), and Area of reactance (AX) according to age, sex, weight, and height for Egyptian children and adolescents
Summary
Impulse oscillometry (IOS) is important in diagnosing respiratory functions in non-cooperative children. The impulse oscillometry system (IOS) is important in the diagnosis of respiratory functions in non-cooperative children [2] It does not depend on the effort of the patients as it needs only tidal breathing, the sound waves emitted by the apparatus are superimposed on normal tidal breathing, and the disturbances in the flow and pressure (caused by the external waves done by the patients) are used to calculate the resistance to airflow and the reactive parameters over a wide range of frequencies (usually from 5 to 20 Hz). The best results of IOS done by the patients are usually compared to the predictive reference value of the same sex, age, weight, height, body mass index (BMI) of the patients These reference values are different for children of different ethnicities; studies aim to develop local reference values [5]. Studies are increasing nowadays in different populations to increase the use of IOS and its reliability especially in non-cooperative children because till spirometry is used more reliably as it is more studied [6]
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