Use of an externally powered, small-volume nebulizer for aerosol ...

[V@ndy87]

Use of an externally powered, small-volume nebulizer for aerosol delivery during partial ventila-tory support with PSV may cause which of the following?
 
  1. High VT alarm activation
  2. Triggering difficulties
  3. Low pressure alarm activation
  4. Ventilator inoperative alarm
  a. 1 and 2
  b. 2 and 3
  c. 3 and 4
  d. 1 and 4

Question 2

The graphics below indicate which of the following conditions?
 
  a. Auto-PEEP
  b. Active exhalation
  c. Inadequate flow setting
  d. Increased expiratory resistance

[Kaytorgator]

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.