Inflammation and repair · USMLE Step 1

Which statement best describes the difference between exudate and transudate in inflammation-related fluid accumulation?

  1. Exudate is protein-poor; transudate is protein-rich
  2. Exudate arises from vascular permeability; transudate from pressure imbalance
  3. Transudate is purulent; exudate is clear serous
  4. They are identical fluids with different names
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Correct answer: Exudate arises from vascular permeability; transudate from pressure imbalance

Exudate forms when increased vascular permeability allows protein-rich fluid to leak; transudate results from hydrostatic or oncotic pressure changes, producing relatively protein-poor fluid.

Difficulty: Medium Question 19 of 22

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