Altitude-Associated Central Apnea in Continuous Positive Airway Pressure Therapy

Area of Science:

• Sleep Medicine
• Altitude Physiology

Background:

• High altitude environments present challenges to respiratory regulation.
• Hypobaric hypoxia at high altitudes can induce central apneas.
• Obstructive sleep apnea (OSA) patients may be particularly susceptible.

Observation:

• A 64-year-old male on CPAP for severe OSA experienced central apneas exclusively at high altitudes (2,600m).
• Symptoms and central apneas occurred only during sleep at high altitudes.
• Other causes of central apnea were excluded.

Findings:

• Altitude-associated central apnea is a recognized condition above 1,600m.
• Supplemental oxygen effectively corrected the central apneas in this case.
• Acetazolamide is another recommended treatment.

Implications:

• Clinicians should consider altitude changes in patients with OSA on positive airway pressure (PAP) therapy.
• Occupational and recreational travel to high altitudes can precipitate sleep-disordered breathing.
• Awareness is crucial for managing OSA patients in diverse environmental conditions.