The BEST way for the tech to explain how CPAP helps eliminate obstructive apnea is to explain that:

The BEST way for the tech to explain how CPAP helps eliminate obstructive apnea is to explain that:

• A. CPAP splints the obstructive airway open
• B. Chemoreceptors will reset and eliminate apnea
• C. There are separate pressures for inspiration and expiration
• D. The airway typically collapses at the end of inspiration

Answer: (A)

CPAP works by providing a steady, continuous positive pressure that acts like a splint for the upper airway. In obstructive sleep apnea, the airway tends to collapse during sleep due to negative pressure and tissue laxity. The constant positive pressure from CPAP keeps the airway open, preventing collapse of the soft palate and pharyngeal walls so air can flow freely throughout inspiration and expiration. This mechanical “stenting” reduces apneas and hypopneas and improves oxygenation and sleep quality. Chemoreceptor resetting describes changes in ventilatory drive, which isn’t how CPAP works. Using different pressures for inspiration and expiration describes bilevel therapy, not CPAP. The idea that the airway collapses at the end of inspiration isn’t the mechanism CPAP relies on; CPAP prevents collapse across the entire breathing cycle by maintaining continuous pressure.

CPAP works by providing a steady, continuous positive pressure that acts like a splint for the upper airway. In obstructive sleep apnea, the airway tends to collapse during sleep due to negative pressure and tissue laxity. The constant positive pressure from CPAP keeps the airway open, preventing collapse of the soft palate and pharyngeal walls so air can flow freely throughout inspiration and expiration. This mechanical “stenting” reduces apneas and hypopneas and improves oxygenation and sleep quality.

Chemoreceptor resetting describes changes in ventilatory drive, which isn’t how CPAP works. Using different pressures for inspiration and expiration describes bilevel therapy, not CPAP. The idea that the airway collapses at the end of inspiration isn’t the mechanism CPAP relies on; CPAP prevents collapse across the entire breathing cycle by maintaining continuous pressure.