Impulse oscillometry is a method for assessing respiratory function based on the analysis of respiratory resistance at a range of imposed oscillations with a frequency of 5 to 35 Hz. The advantage of the method over spirometry is that it does not require forced breathing maneuvers, but its use is currently limited in pediatric practice.

OBJECTIVE

To determine a relationship between the parameters of impulse oscillometry and spirometry in children.

MATERIALS AND METHODS

The study included 330 children of both sexes aged 4 to 14 years. All children underwent spirometry and impulse oscillometry according to the standard procedure. A correlation analysis was performed between the volumetric and velocity parameters of spirometry and the resistance parameters of impulse oscillometry.

RESULTS

An inverse relationship was found indicating an increase in respiratory resistance at the proximal and distal parts of the respiratory tract with a decrease in the forced expiratory volume for the first second, the peak expiratory flow rate, the maximum expiratory volume rate at 25—75% of the forced vital capacity (r=from –0.28 to –0.214; p<0.001). A direct relationship was found between the forced vital capacity and the tidal volume measured by impulse oscillometry (r=0.213; p<0.001).

CONCLUSION

Impulse oscillometry can be used both independently and as an additional method for assessing respiratory function in children.