Which feature favors a transudate over an exudate in serous effusion?

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Multiple Choice

Which feature favors a transudate over an exudate in serous effusion?

Transudates come from systemic forces that push fluid into the space or pull fluid back into the circulation, so the fluid that collects has little protein and little LDH. It’s usually clear or pale yellow and has a low specific gravity. Exudates, from inflammation or malignancy, leak more protein and LDH into the fluid and are often turbid or bloody with higher cellular content and sometimes higher cholesterol. The best feature here is the one describing a pale yellow fluid with total protein under 30 g/L, LDH below the exudate threshold (ratio to serum LDH under 0.6), and a low specific gravity (below 1.015). These characteristics align with a transudate, reflecting its low protein and low LDH content. The remaining options depict higher protein and LDH levels or inflammatory/turbid characteristics that point toward exudates.

Transudates come from systemic forces that push fluid into the space or pull fluid back into the circulation, so the fluid that collects has little protein and little LDH. It’s usually clear or pale yellow and has a low specific gravity. Exudates, from inflammation or malignancy, leak more protein and LDH into the fluid and are often turbid or bloody with higher cellular content and sometimes higher cholesterol.

The best feature here is the one describing a pale yellow fluid with total protein under 30 g/L, LDH below the exudate threshold (ratio to serum LDH under 0.6), and a low specific gravity (below 1.015). These characteristics align with a transudate, reflecting its low protein and low LDH content. The remaining options depict higher protein and LDH levels or inflammatory/turbid characteristics that point toward exudates.

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