Administration of positive end expiratory pressure (PEEP) or ...

[MGLQZ]

Administration of positive end expiratory pressure (PEEP) or continuous positive airway pressure (CPAP) is associated with which of the following benefits?
 
  1. Helps maintain open alveoli.
  2. Helps with alveoli stability.
  3. Helps maintain fluid-filled alveoli open.
  4. Ensures surfactant-depleted alveoli remain closed.
  a. 1 and 3 only
  b. 1, 2, and 3 only
  c. 3 and 4 only
  d. 2, 3, and 4 only

Question 2

Which of the following conditions is associated with a lack of response to increased FiO2 in pa-tients receiving positive-pressure ventilation?
 
  a. Dead space
  b. Shunt
  c. Hypoxemia
  d. Hypoventilation

[tofugiraffe]

Answer to Question 1

ANS: B
Administration of PEEP with mechanical ventilation or to a spontaneously breathing patient in the form of CPAP helps to maintain open and stabilize small, collapsed, or fluid-filled alveoli.

Answer to Question 2

ANS: B
If the patient is receiving mechanical ventilation and has adequate alveolar ventilation, failure of the PaO2 to respond to increased FiO2 likely means that the hypoxemia is due to diffusion defect or shunt.