In which of the following would loculation of pleural fluid be as likely to occur? 1. Empyema 2. Exudative fluid 3. Hemothorax 4. Congestive heart failure
a. 4 only
b. 2 and 3 only
c. 1, 2, and 4 only
d. 1, 2, and 3 only
ANS: D
Loculation of pleural fluid (or trapping so the fluid does not move freely with changing posi-tions) is more commonly seen in exudative effusions, hemothorax (blood in the pleural space), and empyema (infection of the pleural fluid).
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