CPAP machines treat sleep apnea by delivering a stream of oxygenated air into your airways through a mask and a tube.  There are many types of CPAP machines, most of which operate in a similar fashion. The pressurized air prevents your airways from collapsing, which allows you to breathe continuously while you sleep.  Anyone who has suffered from cancer, lung problems or other injuries after using a recalled Philips machine can now file a Philips CPAP lawsuit for potential compensation. Philips recalled millions of its CPAP, BiPAP and ventilator machines because of potential carcinogen and toxic chemical exposure.