Question: In a patient with hepatic cirrhosis and ascites, which develops a pleural effusion with the following data in the pleural fluid: LDH 45 U / L (serum 220 U / L), protein ratio pleura / serum 0.3 and ratio LDH pleura / serum 0.2. What would be the right attitude? 
 Options:  <1> The study of the fluid with cell count, glucose, pH, ADA, cholesterol and culture should be expanded. <2> Blind pleural biopsy. <3> Diagnostic video-assisted thoracoscopy. <4> Empirical antibiotic therapy for suspected parapneumonic effusion. <5> Continue the treatment of your liver disease.
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