CVP And GI Pathology Exam 3 Practice

In compression atelectasis, the mediastinum shifts in which direction relative to the affected lung?

Away from Toward Across Parallel to

Correct Answer:

Away from

Explanation:

Compression atelectasis happens when external pressure collapses part of the lung, so the affected side loses volume. With less volume on that side, the mediastinal contents are pushed away toward the opposite side. So the mediastinum shifts away from the collapsed lung. This differs from atelectasis due to airway obstruction, where the mediastinum tends to shift toward the affected side because the obstructed side becomes relatively denser from loss of air.

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