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Prevalence and determinants of co-morbidities in patients with obstructive apnea and chronic obstructive pulmonary disease

Published:September 05, 2019DOI:https://doi.org/10.1016/j.ejim.2019.08.020
      The coexistence of obstructive sleep apnea (OSA) and chronic obstructive pulmonary disease (COPD) has been described as the “overlap syndrome” (OS) [
      • McNicholas WT
      COPD-OSA overlap syndrome: evolving evidence regarding epidemiology, clinical consequences, and management.
      ]. Compared to patients with simple OSA, patients with OS exhibit a lower nocturnal oxygen saturation (SaO2), more profound desaturations during the apneic events and often severe hypoventilation particularly during rapid-eye-movements sleep [
      • Chaouat A
      • Weitzenblum E
      • Krieger J
      • Ifoundza T
      • Oswald M
      • Kessler R
      Association of chronic obstructive pulmonary disease and sleep apnea syndrome.
      ].

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