Current status of impulse oscillometry in pulmonary practice

Impulse Oscillometry (IOS) is a non-invasive method for assessing respiratory mechanics, enabling the analysis of airway resistance and reactance at different levels (from large bronchi to peripheral compartments). The article discusses the method’s principles, key parameters (R5, R20, X5, Ax, Fres), and their clinical interpretation in asthma and COPD, based on literature data and clinical cases. Current evidence highlights IOS’s high sensitivity for diagnosing and monitoring obstructive pathologies. Parameters Ax and R5 − R20 correlate with disease severity and treatment efficacy; however, the method’s integration into clinical practice requires standardization of reference values and inclusion in international guidelines (GOLD, GINA).