Question

Light criteria for exudative effusion:

a) Pleural fluid protein/serum protein ratio > 0.5, pleural fluid LDH/serum LDH ratio > 0.6, pleural fluid LDH > two-thirds the upper limit of normal serum LDH

b) Pleural fluid protein/serum protein ratio > 0.5, pleural fluid LDH/serum LDH ratio > 0.6, pleural fluid LDH > two-thirds the upper limit of normal serum LDH

c) Pleural fluid protein/serum protein ratio < 0.5, pleural fluid LDH/serum LDH ratio < 0.6, pleural fluid LDH < two-thirds the upper limit of normal serum LDH

d) Pleural fluid protein/serum protein ratio < 0.5, pleural fluid LDH/serum LDH ratio > 0.6, pleural fluid LDH > two-thirds the upper limit of normal serum LDH

Answer 1

The Light's criteria for exudative effusion state that the ratios of pleural fluid protein to serum protein should be greater than 0.5, pleural fluid LDH to serum LDH should be greater than 0.6, and pleural fluid LDH should be greater than two-thirds the upper limit of normal serum LDH.

Step-by-step explanation:

The correct answer to the provided question 'Light criteria for exudative effusion' is:
a) Pleural fluid protein/serum protein ratio > 0.5, pleural fluid LDH/serum LDH ratio > 0.6, pleural fluid LDH > two-thirds the upper limit of normal serum LDH
These criteria are used to classify pleural effusions as either exudative or transudative. An exudative effusion is typically characterized by increased capillary permeability or decreased lymphatic drainage, resulting in pleural fluid that has high protein content, high lactate dehydrogenase (LDH), and specific gravity. These criteria are important for guiding the diagnosis and management of patients with pleural effusions, which can be symptomatic of various underlying conditions like infections, malignancies, or inflammatory diseases.