Positive airway pressure (PAP) is one of the most common treatments for sleep apnea. Sleep apnea is a breathing disorder that affects 3 to 7% of the population. Positive airway pressure is a way to offset the breathing difficulties that these patients have throughout the night. There are two types of machines that can assist with sleep apnea treatments. One is called a CPAP and the other is called a BiPAP. We are going to talk about the difference between these two and which one to use in which situations.