A CPAP machine uses mild pressurized air to help keep your airways open while you sleep. It has several parts:
A mask or mouthpiece that fits over your nose or your nose and mouth.
A band or straps to keep the mask in place.
A small tabletop box that plugs into a wall outlet. This contains the CPAP’s motor, which creates and pumps pressurized air.
A tube connecting the mask to the motor box.
For a CPAP to treat and manage your sleep apnea, you need to wear it each time you go to sleep and during naps. You also have to use it while traveling and on vacation. Machines come with a carrying case so you can bring it with you. Air pressure is measured in centimeters of water, or cm H2O. Your doctor will decide which pressure setting works best for you. The device also relays information back to your doctor. It tells them how often you use it, if the mask is leaking air, and if your sleep apnea is continuing. Your setting may change over time. That’s why it’s important to see your doctor for follow-up visits.