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Objecive: Pleural effusions are associated with high morbidity in children. Oxidative stress, which refers to an imbalance between oxidants and antioxidants, is associated with various diseases including lung diseases. The aim of this study was to investigate to the total oxidative status (TOS) and total antioxidative status (TAS) in differentiating exudates from transudates in children. Material and Methods: In this cross-sectional study, data from patients who were hospitalized for parapneumonic effusions and underwent thoracentesis from October 2012 to December 2013 in the pediatric surgery department. The patiens were divided into two groups (the exuda and transude groups) according to Light’s criteria. Blood plasma and parapneumonic effusions were analyzed and compared with respect to the total antioxidative and oxidative status. Results: The study consisted of blood plasma and pleural effusion from 40 children with parapneumonic effusions (PPEs) (transude group [n=20]; exuda group [n=20]) and just blood plasma from 30 healthy children (control group). There were no significant difference between the groups in terms of gender and age. The blood plasma TAS level of the control group was significantly higher than the level of blood plasma TAS level of the exuda and transude groups with statistically significant (p<0.001). The value of plasma oxidative stress index (OSI) and TOS of exuda group were significantly higher than those of the control and transude groups with statistically significant (p<0.05). Conclusion: This study suggests that inflammation is associated with PPE in children that increased OSI in blood plasma from PPE patients is related to tissue damage and turnover.

What is the Diagnostic Value of Plasma Antioxidative/Oxidative Status in Parapneumonic Effusions in Children?