The "overlap syndrome" refers to a patient who has both obstructive sleep apnea and chronic obstructive pulmonary disease (COPD).
Clinical features:
(1) obstructive sleep apnea
(2) COPD (with an obstructive ventilatory pattern on spirometry)
(3) hypoxemia and hypercapnia
(4) increased risk of developing pulmonary hypertension
Patients may require continuous positive airway pressure (CPAP) or noninvasive ventilation (NIV) at night, with or without supplemental oxygen.
Supplemental oxygen may be needed during the day if the patient has significant hypoxemia during the day (PaO2 < 55 mm Hg).
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Purpose: To evaluate a patient for the overlap syndrome of obstructive sleep apnea and COPD.
Specialty: Pulmonology
Objective: criteria for diagnosis
ICD-10: G47.3, J44.9,
