high frequency oscillation

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a backward and forward motion, like that of a pendulum; also vibration, fluctuation, or variation.
high frequency oscillation a type of high frequency ventilation characterized by the use of active expiration.

high fre·quen·cy os·cil·la·tion

(HFO) (hī frē'kwĕn-sē os'i-lā'shŭn)
A type of mechanical ventilation.
References in periodicals archive ?
Besides the high frequency oscillations, both data segments contain strong shifts of [theta](t).
The principal high frequency oscillation ventilators available in ANZ at the time of the study were the Sensormedics HFOV 3100A for neonates and paediatrics and 3100B for adults.
High frequency oscillations (80-500 Hz) in the preictal period in patients with focal seizures.
Interictal high frequency oscillations in an animal model of infantile spasms.
High frequency oscillations of water level are generated by drops dropping on the surface of tube and motions of the air in underground.

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