Mean airway pressure can be increased when ventilating with the Bunnell Life Pulse High-Frequency Jet Ventilator by doing which of the following?
a. Closing off the purge valve
b. Decreasing the rate on the Bunnell
c. Decreasing the positive end-expiratory pressure on the Bunnell
d. Increasing rate and volume of sigh breaths on the conventional ventilator
ANS: D
The function of the purge valve is to provide a moisture-free environment in the monitoring line of the hi-lo jet tube. Decreasing the rate decreases the mean airway pressure because less time is spent at the inspiratory pressure. Decreasing the positive end-expiratory pressure level decreases the mean airway pressure. Increasing the rate and volume of the sigh breaths increases the mean airway pressure.
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