Sleep and Breathing

, Volume 17, Issue 2, pp 845–852

Breathing irregularity during wakefulness associates with CPAP acceptance in sleep apnea

Authors

    • Second Department of Internal Medicine (Department of Respiratory Medicine)Nara Medical University
  • Frank J. Jacono
    • Division of Pulmonary, Critical Care and Sleep MedicineCase Western Reserve University
    • Louis Stokes Cleveland VA Medical Center
  • Yukio Fujita
    • Second Department of Internal Medicine (Department of Respiratory Medicine)Nara Medical University
  • Masanori Yoshikawa
    • Second Department of Internal Medicine (Department of Respiratory Medicine)Nara Medical University
  • Yoshinobu Ohnishi
    • Department of Internal MedicineTenri City Hospital
  • Hiroshi Nakano
    • Department of PulmonologyFukuoka National Hospital
  • Cara K. Campanaro
    • Division of Pulmonary, Critical Care and Sleep MedicineCase Western Reserve University
    • Louis Stokes Cleveland VA Medical Center
  • Kenneth A. Loparo
    • Department of Electrical Engineering and Computer ScienceCase Western Reserve University
  • Kingman P. Strohl
    • Division of Pulmonary, Critical Care and Sleep MedicineCase Western Reserve University
    • Louis Stokes Cleveland VA Medical Center
  • Hiroshi Kimura
    • Second Department of Internal Medicine (Department of Respiratory Medicine)Nara Medical University
Original Article

DOI: 10.1007/s11325-012-0775-2

Cite this article as:
Yamauchi, M., Jacono, F.J., Fujita, Y. et al. Sleep Breath (2013) 17: 845. doi:10.1007/s11325-012-0775-2

Abstract

Purpose

Individuals have different breathing patterns at rest, during wakefulness, and during sleep, and patients with sleep apnea are no different. The hypothesis for this study was that breathing irregularity during wakefulness associates with CPAP acceptance in obstructive sleep apnea (OSA).

Methods

From a 2007–2010-database of patients with a diagnostic polysomnography (PSG) and prescribed CPAP (n = 380), retrospectively, 66 patients who quit CPAP treatment at 6 months were identified. Among them, 27 OSA patients quit despite having no side effects for discontinuing CPAP (Group A) and were compared to a matched group (age, body mass index, and apnea–hypopnea index) with good 6-month CPAP adherence (Group B; n = 21). Five minutes of respiratory signal during wakefulness at the initial PSG were extracted from respiratory inductance plethysmography recordings, and measured in a blinded fashion. The coefficients of variation (CV) for the breath-to-breath inspiration time (Ti), expiration time (Te), Ti + Te (Ttot), and relative tidal volume, as well as an independent information theory-based metric of signal pattern variability (mutual information) were compared between groups.

Results

The CV for tidal volume was significantly greater (p = 0.001), and mutual information was significantly lower (p = 0.041) in Group A as compared to Group B.

Conclusions

Differences in two independent measures of breathing irregularity correlated with CPAP rejection in OSA patients without nasal symptoms or comorbidity. Prospective studies of adherence should examine traits of breathing stability.

Keywords

Obstructive sleep apneaCPAP adherenceRespiratory controlNonlinear analysis

Copyright information

© Springer-Verlag Berlin Heidelberg 2012