The purpose of an intentional leak in PAP therapy is to

The purpose of an intentional leak in PAP therapy is to

• A. Apply adequate pressure to minimize snoring
• B. Provide negative inspiratory airway pressure
• C. Reduce pressure at the beginning of exhalation
• D. Wash out CO2 and prevent rebreathing

Answer: (D)

Intentional leak is built into a PAP system to continuously vent exhaled air and keep the circuit from rebreathing the patient’s own CO2. As you exhale, the leak provides a steady path for that gas to escape, which flushes out CO2 and maintains the intended positive airway pressure throughout the breathing cycle. This is why the correct choice is that the leak’s purpose is to wash out CO2 and prevent rebreathing. Other options miss the main function: adjusting pressure to reduce snoring is achieved by the prescribed pressure settings, not the leak itself; PAP delivers positive, not negative, pressure; and simplifying what happens at the start of exhalation isn’t the primary role of the intentional leak—that relates more to features like expiratory pressure relief rather than the leak path itself.

Intentional leak is built into a PAP system to continuously vent exhaled air and keep the circuit from rebreathing the patient’s own CO2. As you exhale, the leak provides a steady path for that gas to escape, which flushes out CO2 and maintains the intended positive airway pressure throughout the breathing cycle. This is why the correct choice is that the leak’s purpose is to wash out CO2 and prevent rebreathing.

Other options miss the main function: adjusting pressure to reduce snoring is achieved by the prescribed pressure settings, not the leak itself; PAP delivers positive, not negative, pressure; and simplifying what happens at the start of exhalation isn’t the primary role of the intentional leak—that relates more to features like expiratory pressure relief rather than the leak path itself.