All of the following are components of Light's criteria for pleural effusion except:
High-Yield Explanation
LIGHT CRITERIA Pleural fluid protein/Serum protein >0.5 Pleural fluid LDH/Serum LDH >0.6 Pleural fluid LDH more than two-thirds normal upper limit for serum Exudative pleural effusions meet at least one of the following criteria, whereas transudative pleural effusions meet none These criteria misidentify ~25% of transudates as exudates.