In high-frequency ventilation (HFV), CO2 elimination depends mainly on which of the follow-ing?
a. Pressure amplitude
b. Mean airway pressure
c. High-frequency rate
d. Sinusoidal waveform
ANS: A
The minute ventilation delivered with HFV has a greater dependency on alterations in tidal vol-ume rather than breath frequency, with tidal volume most affected by changes in pressure or am-plitude (increased pressure change or amplitude increases tidal volume).
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