Ventilators, Intensive Care, Adult, High-Frequency
Definition : Adult intensive care ventilators that use positive pressure to deliver breaths at frequencies much higher than the normal breathing rate (usually at 100 or more times per minute) and at a reduced tidal volume. The most common techniques used are conventional high-frequency positive pressure, high-frequency oscillation ventilation, and high-frequency jet ventilation. Conventional positive pressure ventilators typically operate at frequencies up to 150 cycles/minute, while oscillation ventilators operate at frequencies of 400 to 2400 cycles/minute, and jet ventilators operate from 100 to 600 cycles/minute. These ventilators are designed to reduce pressured-induced lung damage (i.e., barotrauma) and the effects of high tidal volume and positive pressure used in conventional ventilation. High-frequency intensive care ventilators are used in patients who cannot tolerate the airway pressures needed for ventilation at typical volumes or when motionless field is required for surgery near the airways; most of them are also capable of ventilation at normal breathing rates.
Entry Terms : "Ventilators, Flow-Interruption" , "Flow-Interruption Ventilators, High-Frequency" , "High-Frequency Ventilators" , "Ventilators, Oscillatory" , "Oscillatory Ventilators, High-Frequency" , "Jet Ventilators" , "Ventilators, Jet"
UMDC code : 15783