PAP is not oxygen–it is merely pressurized room air. It only causes your airway to open, it does not deliver air for you to breathe. It is not a ventilator. It’s easy to see why people confuse the two. When sleep apnea occurs, a person’s oxygen level drops. However, the first line of defense for sleep apnea is not oxygen it is PAP. In rare cases, such as with sleep apnea patients who also have COPD, something known as supplemental oxygen is given along with PAP, usually through the PAP mask by way of extra tubing. Back to FAQ main page  ]]>