high-frequency oscillatory ventilation
An alternative ventilation strategy that delivers very small tidal volumes at extremely high frequencies to provide gas exchange while minimizing lung injury.
Full Definition
High-frequency oscillatory ventilation (HFOV) is a specialized form of mechanical ventilation that uses very high respiratory rates (typically 180-900 breaths per minute) with extremely small tidal volumes, often less than anatomical dead space. In pediatric critical care, HFOV is primarily used as rescue therapy for severe hypoxemic respiratory failure when conventional ventilation fails or as a lung-protective strategy in conditions such as severe ARDS. The technique maintains lung recruitment through continuous positive airway pressure while oscillations create gas exchange through mechanisms beyond simple bulk flow. HFOV can be particularly beneficial in pediatric patients due to their smaller airways and different respiratory mechanics compared to adults.
Usage
Usage note: Often abbreviated as HFOV; ensure distinction from other high-frequency techniques.
In Context
- "The patient was transitioned to high-frequency oscillatory ventilation after conventional ventilation failed to maintain adequate oxygenation." — Critical care management note
- "HFOV parameters were optimized with a frequency of 10 Hz and mean airway pressure of 18 cmH2O." — Respiratory therapy documentation