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'''Bilevel positive airway pressure (BPAP)''' is a [[continuous positive airway pressure]] (CPAP) mode used during noninvasive positive pressure ventilation. It delivers a preset inspiratory positive airway pressure ([[IPAP]]) and expiratory positive airway pressure ([[EPAP]]). BPAP can be described as a Continuous Positive Airway Pressure system with a time-cycled change of the applied CPAP level. CPAP, BPAP and other non-invasive ventilation modes have been shown to be effective management tools for chronic obstructive pulmonary disease and acute respiratory failure.