Biphasic positive airway pressure (BiPAP) is a ventilatory mode in which two pressure levels (higher (Phigh) and lower (Plow)) acting as continuous positive airway pressure (CPAP) alternate at preset time intervals. BiPAP combines pressure-controlled ventilation with unrestricted spontaneous breathing.

What are the benefits of biphasic positive airway pressure mode?

• Patient can breathe spontaneously; paralysis not always required.
• Optimum continous pressure during inspiration reduces work of breathing.
• CO2 levels are generally lower than without support.

What are the two types of medical ventilation?

• Positive-pressure ventilation: pushes the air into the lungs.
• Negative-pressure ventilation: sucks the air into the lungs by making the chest expand and contract.