Light's criteria


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Related to Light's criteria: pleural effusion, Meigs syndrome, SAAG

Light's criteria

Criteria which help differentiate pleural exudates and transudates
Light's criteria for exudates–any of following
Pleural fluid/serum protein ratio > 0.5
Pleural fluid/serum LDH ratio > 0.6
Pleural fluid LDH >23 the normal upper limit for serum  
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References in periodicals archive ?
The present study has been an attempt to determine the role of pleural fluid cholesterol and to suggest that the pleural fluid cholesterol is a better criterion than Light's criteria to differentiate exudative and transudative effusion.
Comparison of Light's criteria and pleural fluid cholesterol to distinguish exudative and transudative pleural fluid.
The rationale of this study was also to compare the usefulness of the new criteria with classical Light's criteria.
The cutoff point of LDH-PF was 200 U/L as recommended in Light's criteria.
An effusion should be classified as either an exudate or a transudate using the modified Light's criteria.
Key words: Pleural fluid, transudates, exudates, Light's criteria
The first question to ask in assessing a patient with a pleural effusion is whether that effusion is a transudate or an exudate by using Light's criteria (1).
Light's criteria misclassified 3 transudates, while PF/S cholinesterase 1 transudates.
Light's criteria misclassified 2 exudates PF/S cholinesterase ratio misclassified only 1 exudate and pleural fluid cholinesterase misclassified none.
Disease wise distribution and its biochemical analysis as per light's criteria has been shown in table 2.
It was found that the specificity of separating transudate and exudates and positive predictive value was 100% with light's criteria, pleural fluid LDH levels and pleural fluid to serum LDH ratio.
In 1996, Garcia-Pachon et al (9) conducted a study on 153 patients with pleural effusion and applied Light's criteria, the pleural fluid cholesterol level, the pleural fluid to serum cholesterol ratio, the pleural fluid cholinesterase level, and the pleural fluid to serum cholinesterase ratio to each case.