BiPAP (Bilevel Positive Airway Pressure) is a noninvasive ventilatory support device that delivers pressurized air to the patient through a tight-fitting mask (full-face or nasal). The device provides two distinct pressure levels: a higher pressure during inspiration  to assist inhalation and reduce respiratory muscle workload, and a lower pressure during expiration to maintain airway patency and improve ventilation without impeding exhalation.

When applied early and in closely monitored settings, it may improve gas exchange, relieve dyspnea, and reduce the need for endotracheal intubation, while ongoing bronchodilators, steroids, and supportive care continue.