Also known as APAP, auto-PAP, auto or self-adjusting CPAP, auto-CPAP offers a range of pressures, allowing the machine to titrate to the pressure needed at any given point in time. These machines have a built-in algorithm determining how much pressure is needed for inhalation with each breath taken.

-Fixed Pressure CPAP-
Traditionally CPAP machines provide a steady or fixed pressure through a mask. This pressure is based on the sleep study outcome, as prescribed by the clinician, as an optimal pressure ensures an open airway during sleep, thus preventing any collapse.

BiPAP machines use bi-level positive airway pressure to deliver higher pressure settings at inhalation and lower pressure settings at exhalation to comfortably treat Central and Complex Sleep Apnea.

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