A short daytime test using correlation dimension for respiratory movement in OSAHS

The European Respiratory Journal
M MiyataE Shimizu

Abstract

In order to examine the pathology in patients with obstructive sleep apnoea/hypopnoea syndrome (OSAHS), the nonlinear properties of respiratory movement and breath-to-breath variations during resting wakefulness with eyes closed was investigated. Recording of the respiratory movement using inductive plethysmography was performed on 14 patients with OSAHS and 13 control subjects for 2 h in the supine position during daytime. To calculate the correlation dimension (D2) for respiratory movement, an algorithm proposed by Grassberger and Procaccia was applied. The indices of breath-to-breath variations were estimated. To calculate D2 and breath-to-breath variations, two different segments were selected (200 s each). The value of D2 for respiratory movement in patients with OSAHS was significantly greater than that in control subjects. In the case of > or = 2.0 of D2 for respiratory movement, the sensitivity and specificity of detecting the presence of OSAHS was 85.7% and 76.9%, respectively. On the basis of breath-to-breath variations, only the coefficient of variation of expiratory time for respiratory movement in patients with OSAHS was significantly greater than that in the control subjects. In conclusion, the measurements of cor...Continue Reading

Citations

Jun 15, 2017·European Journal of Applied Physiology·Rémy DumondJacques Prioux
Feb 3, 2005·Clinical EEG and Neuroscience·Naoto BuriokaEiji Shimizu
Sep 1, 2005·Clinical EEG and Neuroscience·Naoto BuriokaEiji Shimizu
Aug 18, 2012·Respirology : Official Journal of the Asian Pacific Society of Respirology·Mohammad Reza RaoufyMohammad Reza Masjedi
Feb 18, 2011·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Christian StrausThomas Similowski
Jan 16, 2007·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Marie-Noëlle FiammaThomas Similowski
Jan 20, 2021·Journal of Sleep Research·Seren UcakPeter A Cistulli
Jan 14, 2021·Biomedical Physics & Engineering Express·Hemant Sharma, K K Sharma

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