Which statement correctly describes IPAP function on BiPAP?

Which statement correctly describes IPAP function on BiPAP?

• A. Inspiration - supporting ventilation and PaCO2
• B. Inspiration - supporting oxygenation
• C. Expiration - supporting ventilation
• D. Expiration - supporting oxygenation

Answer: (A)

IPAP is the inspiratory pressure level on BiPAP. It raises pressure during the breath in, increasing tidal volume and improving alveolar ventilation, which helps blow off CO2 and lowers PaCO2. Oxygenation, by contrast, is more influenced by EPAP (the expiratory pressure) and FiO2, since maintaining airway patency and recruiting airways during expiration raises mean airway pressure and improves oxygen exchange. So IPAP’s primary role is inspiratory support for ventilation and CO2 elimination, making the statement that it supports ventilation and PaCO2 during inspiration the best description.

IPAP is the inspiratory pressure level on BiPAP. It raises pressure during the breath in, increasing tidal volume and improving alveolar ventilation, which helps blow off CO2 and lowers PaCO2. Oxygenation, by contrast, is more influenced by EPAP (the expiratory pressure) and FiO2, since maintaining airway patency and recruiting airways during expiration raises mean airway pressure and improves oxygen exchange. So IPAP’s primary role is inspiratory support for ventilation and CO2 elimination, making the statement that it supports ventilation and PaCO2 during inspiration the best description.