Evaluation of respiratory airway impedance in patients with OSA during awakening.
R. Machida (Matsuomoto, Japan), S. Nozawa (Matsuomoto, Japan), K. Urushihata (Matsuomoto, Japan), A. Ushiki (Matsuomoto, Japan), M. Yasuo (Matsuomoto, Japan), H. Yamamoto (Matsuomoto, Japan), M. Hanaoka (Matsuomoto, Japan)
Source: International Congress 2019 – Pathophysiological aspects of obstructive sleep apnoea from sea level to high altitude
Disease area: Sleep and breathing disorders
Abstract Background: Obstructive sleep apnea (OSA) is related to narrowing upper airway. The forced oscillation technique (FOT) is a noninvasive method to evaluate resistance and reactance in airway system.
Aims and objectives: The aim of this study was to assess the relation between the airway resistance during awakening by FOT and the severity of OSA.
Methods: We examined the respiratory impedance of 35 patients with OSA during awakening in the sitting, supine, and left lateral recumbent positions using the MostGraph-01® (CHEST M.I., Tokyo, Japan) FOT instrument.
Results: Significant correlations between the apnea-hypopnea index (AHI) and respiratory resistance at 5 Hz (R5), as well as respiratory resistance at 20 Hz (R20), were observed in the supine position. In addition, AHI in the supine position were significantly correlated with R5 and R20 in each the sitting, supine, and left lateral recumbent positions.
Conclusions: FOT might be a useful technique to estimate the pathophysiology and severity of OSA.
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R. Machida (Matsuomoto, Japan), S. Nozawa (Matsuomoto, Japan), K. Urushihata (Matsuomoto, Japan), A. Ushiki (Matsuomoto, Japan), M. Yasuo (Matsuomoto, Japan), H. Yamamoto (Matsuomoto, Japan), M. Hanaoka (Matsuomoto, Japan). Evaluation of respiratory airway impedance in patients with OSA during awakening.. 870
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