The tidal volume of a breath from a high-frequency jet ventilator depends on which of the fol-lowing factors?
a. Pulsation pressure c. Frequency of the driving pressure
b. Amount of bias flow d. Jet orifice size
ANS: D
The tidal volume of a breath during high-frequency jet ventilation depends on four basic factors: (1) the length of the pulsation, (2) the amplitude or driving pressure of the jet, (3) the jet orifice size, and (4) the patient's lung characteristics.
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