"Current place of impulse oscillometry in the assessment of pulmonary diseases.". (August 2020)

• Record Type: Journal Article
• Authors: Bednarek, Marcin; Grabicki, Marcin; Piorunek, Tomasz; Batura-Gabryel, Halina
• Is Part Of: Respiratory medicine. Volume 170(2020)
• Publication Date: 2020-08
• Subjects: Chronic obstructive pulmonary disease -- Asthma -- Pulmonary function test -- Impulse oscillometry -- Spirometry -- Interstitial lung disease -- Obstructive sleep apnea; ATS American Thoracic Society -- Ax reactance area -- Co coherence -- COPD chronic obstructive pulmonary disease -- DLCO diffusing capacity of the lungs for carbon monoxide -- EB-OCT endobronchial optical coherence tomography -- ERS European Respiratory Society -- FEV1 forced expiratory volume in one second -- FOT forced oscillation technique -- FRC functional residual capacity -- Fres resonant frequency -- FVC forced vital capacity -- GOLD Global Initiative for Chronic Obstructive Lung Disease -- ILD Interstitial lung disease -- IOS impulse oscillometry -- MEFX% maximal forced expiratory flow where X% of the FVC remains to be expired -- MRC British Medical Research Council dyspnea scale -- OSA obstructive sleep apnea -- PAD peripheral airways disease -- Rrs resistance of respiratory system -- SAD small airways dysfunction -- SGRQ St. George's Respiratory Questionnaire -- Xrs reactance of respiratory system; Chest -- Diseases -- Periodicals; Chest -- Diseases -- Great Britain -- Periodicals; Respiratory organs -- Diseases -- Periodicals; Respiratory Tract Diseases -- Periodicals; Appareil respiratoire -- Maladies -- Périodiques; Thorax -- Maladies -- Périodiques; Appareil respiratoire -- Maladies -- Traitement -- Périodiques; Electronic journals; 616.2
• DOI: 10.1016/j.rmed.2020.105952
• Languages: English
• ISSNs: 0954-6111

Abstract

Abstract: In 1956, a diagnostic tool using the forced oscillation technique (FOT) was developed to examine respiratory functions. A modification of this method is impulse oscillometry (IOS). In the latter, a loudspeaker delivers to the respiratory system a regular, square pressure wave at a constant frequency from which all other individual frequencies are derived using spectral analysis. The usefulness of IOS has been examined in relation to COPD, asthma, interstitial lung diseases, obstructive sleep apnea, and other conditions. The greatest advantage, most notable in children, is the ability to monitor the course of a disease and to assess the response to therapy in a simple way, i.e., minimal requirements for the cooperation of the patient, rapid and reproducible measurements. The IOS shows similar or even higher sensitivity than spirometry in detecting small airways dysfunction (SAD). The most well-known result observed in peripheral airways disease (PAD) is the frequency dependence of resistance. Importantly, the abnormal resistance at a specific frequency may occur with normal spirometry in those with early PAD. Moreover, IOS is particularly useful if the patient cannot perform effort dependent exhalation. Despite its advantages, the technique is still poorly found in official worldwide recommendations. Nonetheless, considering the promising results of many studies, an increase in interest in IOS is expected, and it could soon be on par with standard pulmonary function tests. The aim of this work is to present the basics, current views, and various aspects of IOS. To carry out our analysis, we searched for relevant publications on PubMed, Web of Science. Original and review articles were selected and discussed. Highlights: The greatest advantage is the ability to monitor the course of a disease and to assess the response to therapy. The IOS shows similar or even higher sensitivity than spirometry in small airways dysfunction. IOS is particularly useful if the patient cannot perform effort dependent exhalation. Interest in IOS is expected, and it could soon be on par with standard pulmonary function tests. The usefulness of IOS has been examined in relation to COPD, asthma, interstitial lung diseases, obstructive sleep apnea, and other conditions.