A continuous positive airway pressure (CPAP) machine is used for respiratory ventilation, primarily in the treatment of sleep apnea. It is also used to treat patients with respiratory failure and newborn infants. CPAP machines help make unobstructed breathing possible. CPAP supplies come in the form of machines, masks, humidifiers, filters, tubing, headgear, nebulizers and defibrillators. CPAP supplies differ by size and style. CPAP masks for sleep apnea can be highly effective and create better sleep in just the first night. CPAP masks for sleep apnea are used to deliver a stream of compressed air that splints the airway so that upper airway does not narrow and oxygen is not reduced in the blood. CPAP machines can assist with ventilation or help eliminate sleep apnea and even the loud snoring that can accompany sleep apnea.