Check out our new Ask the Expert article , in which we talk to Colin Sullivan, M.B.B.S., Ph.D, FRACP – the inventor of continuous positive airway pressure. CPAP is the leading therapy for sleep apnea. Patients wear a face or nasal mask during sleep. The mask, connected to a pump, provides a positive flow of air into the nasal passages in order to keep the airway open. Most insurance companies now pay for sleep testing and for CPAP treatment. In the article, Sullivan talks about the beginning of CPAP and what the future holds for this life-saving technology.