A patient with Guillain-Barr is paralyzed and on mechanical ...

[burton19126]

A patient with Guillain-Barr is paralyzed and on mechanical ventilatory support. Which of the following pulmonary complications is most likely to occur as the result of prolonged immobilization?
 
  a. Pneumonia
  b. Pressure sores
  c. Thromboembolism
  d. Atelectasis

Question 2

The most common cause of acute alveolar hyperventilation is:
 
  a. hypoxemia.
  b. metabolic alkalosis.
  c. tachycardia.
  d. supplemental oxygen administration.

[juicepod]

Answer to Question 1

C
Any patient who must remain in bed for a prolonged time is at risk for developing a thromboembolism.

Answer to Question 2

A
The most common cause of acute alveolar hyperventilation is hypoxemia. The decreased PaO2 seen during acute alveolar hyperventilation usually develops from a decreased ventilation-perfusion ratio, capillary shunting, or venous admixture associated with a pulmonary disorder. The PaO2 continues to drop as the pathologic effects of the disease intensify. Eventually the PaO2 may decline to a point low enough (a PaO2 of about 60 mm Hg) to significantly stimulate the peripheral chemoreceptors, which in turn causes the ventilatory rate to increase. The increased ventilatory response in turn causes the PaCO2 to decrease and the pH to increase.

[burton19126]

Gracias!

[diana chang]

TYSM