What does CPAP require from the patient regarding breathing?

The correct answer is that the patient must initiate all breaths during CPAP (Continuous Positive Airway Pressure) therapy. CPAP is a mode of respiratory support that provides a continuous level of positive pressure to keep the airways open, which is particularly useful in treating obstructive sleep apnea and other conditions where airway patency is compromised.

In CPAP therapy, the patient retains the ability to breathe spontaneously and must actively initiate each breath. This allows for a more natural breathing pattern where the patient can control the timing and depth of their breaths, making it less invasive compared to modes that assist or control breathing. The continuous pressure delivered by CPAP aids in preventing airway collapse and improves oxygenation but does not take over the patient's breathing effort.

Other answer options suggest scenarios that misinterpret how CPAP works. For instance, requiring assistance with every breath would imply a more invasive form of mechanical ventilation, which is not the purpose of CPAP. Automatic tidal volume delivery or restrictions on spontaneous breathing do not apply to CPAP therapy, as it is designed to promote independence in breathing while still providing necessary airway support.