CPAP is an acronym that stands for “Continuous Positive Airway Pressure,” and is used to treat Obstructive Sleep Apnea (OSA). The continuous supply of pressurized air from the CPAP machine applies enough pressure to keep your airways open while you sleep.

The key thing that makes a BiPAP different from other PAP therapy devices is its use of two distinct pressures: IPAP and EPAP. IPAP stands for “inspiratory positive airway pressure” (the set pressure for inhaling). EPAP stands for “expiratory positive airway pressure,” or the set pressure for exhaling.