High-frequency ventilation (HFV) is a broad term describing ventilation at frequencies greater than four times the natural respiratory frequency of the ventilated subject. First described in 1969, it has attracted considerable scientific interest but has failed to establish a definitive or widely accepted niche in clinical practice. HFV continues to evolve; the availability of more effective technology, allied to enhanced understanding of its principles, has rendered HFV a realistic option in the critical care management of certain forms of respiratory failure.
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