Answer to Question 1
ANS: A
When a continuous flow nebulizer is placed between the patient and the sensing mechanism, the patient often finds it more difficult to generate the effort to trigger the ventilator. High VT deliv-ery can occur when externally powered, small-volume nebulizers are used for aerosol delivery.
Answer to Question 2
ANS: C
Inadequate flow during mechanical ventilation is shown in the figure on the pressure-time graph-ic by the concave pressure tracing while the flow curve is constant. Auto PEEP would be evident on the flow graphic when the exhaled flow does not return to zero before the beginning of the next breath. Active exhalation would be evident on the pressure graphic as a peak at the end of inspiration. Increased airway resistance would show as the exhaled flow not returning all the way to zero by the time the next breath begins.
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