LIGHTS Criteria

Differentiate transudate vs exudate in pleural effusion.

Fluid & Serum Data

Fluid Protein

g/dL

Serum Protein

g/dL

Fluid Ldh

U/L

Serum Ldh

U/L

Upper Limit Ldh

U/L

Analysis Results

ResultExudateExudative

Protein Ratio0.54

LDH Ratio0.75

Criteria met for an Exudate. Investigation for inflammatory, infectious, or malignant causes is warranted.

Gold Standard Diagnostic Logic

Disclaimer: This tool is for informational purposes only and is not a substitute for professional medical advice.

About this calculator

Overview

LIGHT criteria classify pleural fluid. Exudate vs transudate.

Fun Facts

Formula: Exudate: LDH ratio >0.6 or protein ratio >0.5 or LDH >2/3 ULN.