For the most part, CPAP machines have been the go-to treatment for obstructive sleep apnea. CPAP machines deliver a steady, continuous stream of pressurized air to patient's airways to prevent them from collapsing and causing apnea events. After a CPAP titration study, your sleep technician and doctor will determine the pressure settings for your CPAP machine and set the machine to deliver that exact amount of pressure continuously.
CPAP machines can only be set to a single pressure that remains consistent throughout the night. However, many CPAP machines have a ramp feature that starts off with a lower pressure setting and gradually builds to the prescribed pressure. This comfort feature simply makes the pressure at the beginning more tolerable and less immediate, once the pressure builds to the required setting, it stays at that setting for the rest of the night.