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Author Question: Which of the following flow-termination settings for a pressure-supported breath that has a peak ... (Read 52 times)

Charlie

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on: Jul 16, 2018
Which of the following flow-termination settings for a pressure-supported breath that has a peak inspiratory flow of 30 L/min would allow enough time for a visible plateau on the pressure-time curve?
 
  a. 5 L/min c. 20 of peak flow
  b. 20 L/min d. 30 of peak flow

Question 2

Pressure-support ventilation is classified as: 1. Flow cycled 2. Time triggered 3. Volume targeted 4. Pressure targeted 5. Patient triggered
 
  a. 2 and 3 c. 1, 4, and 5
  b. 4 and 5 d. 1, 2, and 3


carojassy25

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
The longest inspiratory time provides a visible plateau on the pressure-time scalar. This is caused by a flow termination that takes the longest time to reach. The flow termination that is lowest provides the most visible plateau on a pressure-time scalar. Because 20 of the peak flow of 30 L/min is 6 L/min and 30 of 30 L/min is 9 L/min, the lowest flow in this case is 5 L/min.

Answer to Question 2

ANS: C
In pressure-support ventilation, when the patient begins inspiration, inspiration is limited by pressure and ends when the patient's peak inspiratory flow decreases by a certain percentage (flow cycled).


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