CPAP stands for "Continuous Positive Airway Pressure." A CPAP device works by delivering one type of consistent pressure to clear the airway and maintain healthy breathing as you sleep. There are also Auto CPAP ("automatic Positive Continuous Airway Pressure) which automatically changes pressure through the night based on what your body needs to keep the airway clear. And there is a BiPAP (Bi-level Positive Airway Pressure) which can deliver two different types of pressure, which are determined by your doctor and based on an overnight sleep study. We will supply you whatever device your doctor prescribes.