Which one of the following parameter is consistent with pleural transudate?
Correct Answer: Ldh<2/3 of upper limit of serum ldh
Description: Pleural fluid LDH levels greater than 1000 IU/L suggest empyema, malignant effusion, rheumatoid effusion, or pleural paragonimiasis. The diagnosis is suggested by a pleural fluid/serum LDH ratio of greater than 1, with a pleural fluid/serum protein ratio of less than 0.5 Normal levels of LDH in the blood can vary depending on the lab, but usually range between 140 units per liter (U/L) to 280 U/L for adults and tend to be higher for children and teens Ref Davidson edition23rd pg 626
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