In severe cases of pneumothorax, the mediastinum and trachea: ...

[kamilo84]

In severe cases of pneumothorax, the mediastinum and trachea:
 
  a. remain midline.
  b. sink posteriorly into the chest cavity.
  c. are shifted toward from the side with the pneumothorax.
  d. are shifted away from the side with the pneumothorax.

Question 2

In which mode does flow asynchrony most commonly occur?
 
  a. Volume ventilation.
  b. Pressure ventilation.
  c. CPAP.
  d. No mode is more susceptible.

[mtmmmmmk]

Answer to Question 1

ANS: D
As pressure increases, the affected side's lung collapses and begins to compress the unaffected side. In severe cases, the mediastinum and trachea are shifted away from the side with the pneumothorax.

Answer to Question 2

ANS: A
Flow asynchrony occurs when the flow from the ventilator does not match the flow demand of the patient. This can occur in any mode of ventilation but most commonly occurs in volume ven-tilation because the clinician sets the tidal volume, peak flow, flow waveform, and inspiratory time.