Pleural fluid with a total protein concentration of less than ____________ of the serum total protein level is one of the indications of transudative pleural effusion
a. 20%
b. 30%
c. 40%
d. 50%
ANS: D
A pleural fluid total protein concentration less than 50% of the serum total protein level and lac-tate dehydrogenase (LDH) values in the pleural fluid less than 60% of the serum value indicate the presence of a transudative pleural effusion.
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