People researching sleep apnea therapy often encounter three terms: CPAP, APAP, and BiPAP. Although all three are forms of positive airway pressure therapy, they operate differently and may be prescribed for different treatment needs.

CPAP

CPAP stands for Continuous Positive Airway Pressure. As the name suggests, a CPAP machine delivers continuous pressure throughout the breathing cycle.

A CPAP setup normally includes the machine, a breathing tube, and a mask. The prescribed pressure is intended to help maintain an open airway during sleep.

APAP

APAP means Automatic Positive Airway Pressure. These machines can automatically adjust the delivered pressure within a prescribed range.

Because pressure requirements can change during sleep, automatic adjustment may provide a different therapy experience from a fixed-pressure CPAP machine. However, the appropriate settings should be determined by a healthcare professional.

BiPAP

BiPAP stands for Bilevel Positive Airway Pressure. Instead of providing one continuous pressure level, the device uses separate pressure levels for inhalation and exhalation.

BiLevel machines may be prescribed when a patient's therapy needs differ from those typically addressed with standard CPAP.

Comparing the Options

When comparing APAP and BiPAP machines with standard CPAP devices, consider the prescribed therapy, machine features, portability, mask compatibility, and personal preferences.

Travelers may also want to investigate compact PAP devices. Home users may place greater importance on humidification, data monitoring, and overall comfort.

Speak With Your Healthcare Provider

The most important factor is selecting equipment appropriate for your diagnosed condition and prescribed therapy. A healthcare professional can determine which form of PAP therapy is suitable and what pressure settings should be used.

Once your therapy requirements are established, you can compare the available APAP and BiPAP machines and other PAP devices based on features and lifestyle requirements.