The Influence of Different Mouthpieces on Impulse Oscillometry Results

Respiratory Care
Gustavo Henrique DionísioAda Clarice Gastaldi

Abstract

Impulse oscillometry is a method of airway assessment and diagnosis that provides data on lung mechanics. In the literature, studies have used different types of mouthpieces or did not describe the model used for the tests. We sought to compare the 3 most commonly described mouthpieces in terms of test results, comfort, and subject preference. Thirty-nine healthy volunteers were evaluated with spirometry and impulse oscillometry, assessing the resistance at 5 Hz and 20 Hz (R5 and R20, respectively), reactance at 5 Hz (X5), reactance area, and resonant frequency. A filter heat exchanger with a circular mouthpiece (B1), a filter heat exchanger with an oval mouthpiece (B2), and a filter heat exchanger with a circular mouthpiece coupled with a free-flow piece (B3) were compared using an acceptability and tolerance scale, and subjects noted their preference. Statistical analysis showed differences between all the mouthpieces and the predicted values for R5, R20, and X5. The mouthpiece comparison showed differences in R5 between a filter heat exchanger with an oval mouthpiece (B2) and a circular mouthpiece coupled with a free-flow piece (B3) (P = .007); resonant frequency between a filter heat exchanger with a circular mouthpiece (B1...Continue Reading

Citations

Nov 28, 2019·The European Respiratory Journal·Gregory G KingEllie Oostveen
Dec 31, 2019·ERJ Open Research·Ronald J DandurandUNKNOWN Oscillometry Harmonisation Study Group
Dec 5, 2020·Therapeutics and Clinical Risk Management·Noemi Porojan-SuppiniCristian Oancea

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