Laboratory assessment
Notable elevations of IL-10 and IFN-γ, together with a low level of bioactive TGF-β in tuberculous pericardial fluid, indicate delayed-type hypersensitivity response to the pathogen mediated by Th-1[36]. Elevated pericardial adenosine deaminase (ADA) activity and lysozyme levels are essential in the Diagnosis of TBP[37]. It is said that a pericardial ADA level≥40U/L has a sensitivity and specificity of 88% and 83%, respectively[38]. However, it is not always possible to obtain pericardial fluid or tissue, especially when the constriction has occurred. In the endemic area, globulin level higher than 40g/L, and peripheral leukocyte count less than 10x10^9g/L may infer an infection of TB. Besides, the positive rates of procalcitonin (PCT),C-reactive protein (CRP) are high in the serum of patients with TB. And the measurement of plasma brain natriuretic peptide (BNP) level-a marker of ventricular dysfunction and wall stretch-may be useful in the Diagnosis of CP.