A Continuous Positive Airway Pressure (CPAP) is a medical device that operates on spontaneous ventilation & gas exchange. The device compressor generates an uninterrupted stream of pressurized air across the air passage, improving oxygenated airflow via tube & mask. CPAP are often intended for people dealing with sleep-related breathing disorders, including obstructive sleep apnea (OSA), to keep their airways clear during sleep.