[Influence of thoracentesis and pleural biopsy on biochemical parameters and cytology of pleural fluid].

Objective: To assess the influence of thoracentesis and pleural biopsy on biochemical parameters and cytology of pleural fluid from patients with lymphocytic exudate.

Patients And Methods: A prospective, descriptive study was performed in 72 patients with pleural effusion who had lymphocytic exudate and in whom biopsy was indicated. Biochemical variables and cytology of pleural fluid were analyzed at baseline, 48 hours later (immediately prior to biopsy), and 48 hours after biopsy.