PulmonologyCriteria

Light's Criteria for Pleural Effusion

Differentiates exudative from transudative pleural effusions using protein and LDH ratios from simultaneous pleural fluid and serum samples.

Parameters

Light's Criteria (Exudate if ANY criterion met)any

Pleural fluid protein / Serum protein > 0.5Pleural protein ÷ serum protein ratioPleural fluid LDH / Serum LDH > 0.6Pleural LDH ÷ serum LDH ratioPleural fluid LDH > 2/3 the upper limit of normal serum LDHAbsolute pleural LDH value (typically >200 IU/L, depending on lab reference range)

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PulmonologyCriteria

Light's Criteria for Pleural Effusion

Differentiates exudative from transudative pleural effusions using protein and LDH ratios from simultaneous pleural fluid and serum samples.

Parameters

Light's Criteria (Exudate if ANY criterion met)any

Pleural fluid protein / Serum protein > 0.5Pleural protein ÷ serum protein ratioPleural fluid LDH / Serum LDH > 0.6Pleural LDH ÷ serum LDH ratioPleural fluid LDH > 2/3 the upper limit of normal serum LDHAbsolute pleural LDH value (typically >200 IU/L, depending on lab reference range)

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Fill in the parameters to see your result