Template:Lights Criteria Calculator: Difference between revisions

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|+ style="font-size:16px; font-weight:bold; padding:8px; background:#1a5276; color:white;" | Light's Criteria — Pleural Effusion
|+ style="font-size:16px; font-weight:bold; padding:8px; background:#1a5276; color:white;" | Light's Criteria — [[Pleural effusion|Pleural Effusion]]
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Latest revision as of 16:49, 21 March 2026

Interactive Light's Criteria calculator for pleural effusion. Requires the calculator gadget. Usage: {{Lights Criteria Calculator}}

Light's Criteria

Light's Criteria — Pleural Effusion
Parameter Value
Pleural fluid protein (g/dL)
Serum protein (g/dL)
Pleural fluid LDH (IU/L)
Serum LDH (IU/L)
Upper limit of normal serum LDH (IU/L)
Results
Pleural protein / Serum protein ratio
Pleural LDH / Serum LDH ratio
Pleural LDH / ULN serum LDH
Interpretation
Exudative (any 1 of:) Pleural protein/serum protein > 0.5 OR Pleural LDH/serum LDH > 0.6 OR Pleural LDH > 2/3 ULN serum LDH. Causes: infection, malignancy, PE, autoimmune, etc.
Transudative None of the above criteria met. Causes: CHF, cirrhosis, nephrotic syndrome, PE.
References
  • Light RW, Macgregor MI, Luchsinger PC, et al. Pleural effusions: the diagnostic separation of transudates and exudates. Ann Intern Med. 1972;77(4):507-513. PMID 4642731.