+18 Light's Criteria Mdcalc References. Criteria for identifying exudative pleural effusions. Web when diagnostic thoracentesis is indicated, light's criteria can help differentiate exudates from transudates.

Web light's criteria are used to determine the nature of a pleural fluid sample, and narrow down the differential diagnosis of a pleural effusion. Criteria for identifying exudative pleural effusions. Pleural aspirate should routinely be evaluated using gram stain, cell.