PAP therapy

There are three main types of positive airway pressure therapy:
* Continuous positive airway pressure (CPAP)
* Automatic positive airway pressure (APAP)
* Bilevel, or variable positive airway pressure (VPAP)
All of these types of PAP therapy usually take the form of a machine or device. In turn, that machine is connected to a mask via a tube, and the mask is worn by the sleep apnea patient to deliver the air generated by the machine.