HFOV
Also written as: HFOV — High-Frequency Oscillatory Ventilation
High-frequency oscillatory ventilation that delivers very small tidal volumes at rapid rates to minimize lung injury.
Full Definition
High-frequency oscillatory ventilation (HFOV) is a specialized form of mechanical ventilation that delivers very small tidal volumes (often less than dead space) at extremely high frequencies (typically 180-900 breaths per minute). Instead of conventional positive-pressure breaths, HFOV uses rapid oscillations to move gas in and out of the lungs while maintaining a constant mean airway pressure. This technique is primarily used in severe respiratory failure when conventional ventilation fails, as it can improve oxygenation while potentially reducing ventilator-induced lung injury through minimal pressure swings.
Usage
Usage note: Not to be confused with HFJV (high-frequency jet ventilation), which is a different technique.
In Context
- "Consider HFOV for this patient with severe ARDS who remains hypoxemic despite optimal conventional ventilation." — Critical care consultation note
- "HFOV settings include frequency of 5 Hz and mean airway pressure of 28 cmH2O." — Ventilator order set