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Author Question: What does point A represent on the pressure-time scalar shown in the figure? a. Plateau pressure ... (Read 65 times)

809779

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on: Jul 16, 2018
What does point A represent on the pressure-time scalar shown in the figure?
 
  a. Plateau pressure c. Positive end-expiratory pressure
  b. Maximum safety pressure d. Auto-PEEP

Question 2

Auto-PEEP can be detected without the use of an expiratory pause on which of the following curves?
 
  a. Pressure-time c. Pressure-volume
  b. Flow-time d. Volume-time


meltdown117

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

ANS: D
Auto-PEEP is made visible on a pressure-time scalar with the use of an end-expiratory pause. Point A is not positive end-expiratory pressure because there are areas in the waveform that go down to zero.

Answer to Question 2

ANS: B
When a patient has auto-PEEP, the expiratory flow does not return to zero. A new inspiration begins before the patient has had time to exhale completely. As a result, air remains trapped in the lungs. A pressure-time curve shows auto-PEEP only when an expiratory pause is used.


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