Difference between CPAP, AutoCPAP, and BiLevel devices

Have you ever wondered what the difference is between CPAP, AutoCPAP, and BiLevel devices?

CPAP

This is the most basic flow generator and the device most often prescribed first. In many cases, our insurance coverage dictates CPAP first, because it costs less and most patients do well with it. If challenges arise, then AutoCPAP or BiLevel are then prescribed.

CPAP stands for Continuous Positive Airway Pressure and is just that; a constant and continuous flow of air that the patient must inhale and then exhale. One of the biggest challenges adjusting to CPAP is the overwhelming feeling of that continuous flow of air pressure upon exhalation.

AutoCPAP – Automatic titrating (measuring and adjusting) continuous positive airway pressure

This machine is also known as APAP. Unlike CPAP which is set to deliver one continuous pressure, APAP is set within a high and low-pressure range for the purpose of varying inhalation needs. The range is predetermined by your prescribing physician. APAP has a sensitive algorithm technology that allows the machine to detect how much inhalation pressure you need with each breath.

BiLevel – indicates a flow generator that delivers 2 distinct pressures, one for inhalation and the second for exhalation.

The most complex device, it is also the most expensive and typically reserved for special needs. Most Bilevel devices offer a high setting range of 25 cm H2O vs CPAP and APAP which typically top out at 20. Since exhaling over a constant pressure is one of the most challenging aspects of adjustment for the patient, BiLevel best serves those who require mid to high range inhalation pressure needs