APAP stands for what?

• A. Automatic Positive Airway Pressure
• B. Auto Pressure Support
• C. Auto Positive Airway Pressure
• D. Automated Positive Air Pressure

Answer: (C)

APAP stands for Auto Positive Airway Pressure. This mode describes a device that automatically varies the pressure throughout the night to keep the airway open, within a clinician-set range. Because pressure needs change with sleep stages, body position, and obstruction severity, APAP adapts in real time to deliver only what’s required, often improving comfort and adherence compared with a fixed, single pressure. The alternative phrasings either drop the essential “Airway” term or refer to a different therapy (pressure support) that isn’t what APAP denotes.