Which of the following is an advantage of high frequency oscillation compared with conventional ventilation?

• A. Increased peak airway pressures
• B. Decreased peak airway pressures
• C. Increased intrathoracic pressures
• D. Higher risk of intracranial pressure fluctuation

Answer: (B)

High-frequency oscillation works by delivering very small tidal volumes at a very rapid rate while maintaining a constant mean airway pressure to keep the lungs recruited. Because the breaths are tiny, you don’t need large peak pressures to move air in and out, so the peak airway pressures tend to be lower than with conventional ventilation. This reduction in peak pressures lowers the risk of volutrauma and barotrauma, which is the main advantage when trying to protect the delicate neonatal lung. Continuous mean airway pressure keeps alveoli open, and the oscillatory amplitude mainly influences CO2 removal, not peak pressure. The other options describe pressures that HFOV does not aim to increase, and the overall benefit centers on using lower peak pressures for safer, effective ventilation.