Light’s Criteria (Pleural Exudate vs Transudate)
Light’s Criteria (Pleural Exudate vs Transudate) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
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What this is
Light’s Criteria (Pleural Exudate vs Transudate) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. Light’s Criteria (Pleural Exudate vs Transudate) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Light RW, Macgregor MI, Luchsinger PC, Ball WC Jr. Pleural effusions: the diagnostic separation of transudates and exudates. Ann Intern Med. 1972;77(4):507-513. Read the source ↗
Worked example: Exudate — meets Light's criteria (protein ratio 0.75 > 0.5; LDH ratio 1.5 > 0.6; pleural LDH 300 > 166.7 (2/3 ULN)).
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