Sleep apnea is a condition where breathing stops during sleep. Whether from tracheal obstruction, neurological malfunction, or both, sleep apnea prevents restful sleep and can even be deadly. To combat sleep apnea, CPAP (continuous positive airway pressure) and BiPAP (bilevel positive airway pressure) devices force oxygen into the lungs to help users breathe. Browse CPAP machines, BiPAP machines, and CPAP accessories below: