Which serous fluid condition is suggested by turbid, bloody with TP > 30 g/L, PRO > 0.5 g/L, LDH > 0.6, CHOL > 1.2, SG > 1.015?

• A. Transudate
• B. Exudate
• C. Hemorrhagic Exudate
• D. Pseudoexudate

Answer: (B)

Distinguishing exudates from transudates in serous fluids is based on how the fluid’s protein and enzyme content reflect capillary permeability and inflammation. Exudates have higher protein and LDH because the capillary barrier is damaged, letting larger molecules and cells escape into the fluid. They are often turbid and can be bloody due to inflammatory or malignant processes.

Here, the fluid shows total protein well above typical transudate levels, a protein concentration ratio above the threshold, and an LDH level (relative to serum) exceeding the exudate cutoff. The cholesterol is increased and the specific gravity is elevated as well. Taken together, these biochemical features align with an exudative process rather than a simple transudate. The turbid, bloody appearance fits with inflammation or neoplastic involvement that accompanies an exudate, rather than a purely watery, low-protein transudate. Pseudoexudate would imply lipid- or chyle-related changes that don’t match these measured values.

So the fluid is best classified as an exudate.