Pleural fluid LDH / Serum fluid LDH ratio is _____, to in exudation pleural effusion: (A) > 0.3, (B) > 0.5, (C) > 0.6, (D) > 0.8
Answer is C. Pleural Fluid LDH is > 2/3rd of serum LDH in exudative pleural effusion. Hence Pleural Fluid LDH / Serum LDH is > 0.6.