Which of the following may cause the trachea to shift to the right?
a. Right-sided tension pneumothorax
b. Right-sided large pleural effusion
c. Right upper lobe atelectasis
d. Left lower lobe pneumonia
ANS: C
The trachea shifts away from areas with increased air, fluid, or tissue (e.g., in tension pneumo-thorax or large pleural effusion) and toward atelectasis. In general, abnormalities in the lung bases do not shift the trachea.
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