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http://dx.doi.org/10.3904/kjm.2012.83.4.458

The Ratio Between the Percentage of Lymphocytes and Glucose Levels in Pericardial Fluid as a Method to Diagnose Tuberculous Pericarditis  

Yang, Kyung-Ho (Department of Internal Medicine, Good Samaritan Hospital)
Song, Yoon-Suk (Department of Internal Medicine, Good Samaritan Hospital)
Jung, Sun-Ho (Department of Internal Medicine, Good Samaritan Hospital)
Kim, Tae-Jin (Division of Cardiology, Department of Internal Medicine, Haeundae Paik Hospital of Inje University)
Yoon, Shin-Eui (Division of Cardiology, Department of Internal Medicine, Asan Medical Center)
Jeong, Yong-Suk (Department of Internal Medicine, Good Samaritan Hospital)
Cho, Kil-Hyun (Department of Internal Medicine, Good Samaritan Hospital)
Kim, Young-Bok (Department of Internal Medicine, Good Samaritan Hospital)
Publication Information
The Korean Journal of Medicine / v.83, no.4, 2012 , pp. 458-467 More about this Journal
Abstract
Background/Aims: Adenosine deaminase (ADA) is a valuable biochemical marker for pericardial effusion (PE) and may be useful for diagnosing tuberculous pericarditis (TPE) in patients with PE. However, no definite cut-off or borderline values for ADA currently exist to distinguish TPE from other PE etiologies. In this study, we identified other useful parameters and characterized their relationship with ADA as a method for diagnosing TPE. Methods: From June 2004 to November 2011, 42 patients underwent pericardiocentesis due to moderate or severe PE, as confirmed by echocardiography or chest computed tomography (CT). Patients were subdivided into TPE and non-TPE (NTPE) groups. We analyzed ADA (p) (the pericardial ADA) and %Lymph (p)/Glucose (p) (the ratio between the percentage of lymphocytes and glucose levels in PE). Results: We defined the cut-off value of ADA (p) as 48.5 IU/L, and that of %Lymph (p)/Glucose (p) as 0.678% dL/mg. In a multivariate logistic regression analysis, an odds ratio (OR) of 44.24 and a 95% confidence interval (CI) of 2.85-686.97 were observed in patients with an ADA (p) ${\geq}$ 48.5 IU/L (p = 0.023). An OR of 20.39 and a 95% CI of 1.06-392.93 were observed in patients with a %Lymph (p)/Glucose (p) ${\geq}$ 0.678% dL/mg (p = 0.046). The combination of ADA (p) and %Lymph (p)/Glucose (p) had a higher positive predictive value (PPV, 80.0%) and specificity (Sp, 93.8%) than either ADA (p) (PPV, 47.4%; Sp, 68.8%) or %Lymph (p)/Glucose (p) (PPV, 69.2%; Sp, 87.5%) alone. Conclusions: %Lymph (p)/Glucose (p) is a useful parameter for distinguishing TPE from other pericardial diseases if combined with an ADA (p) ${\geq}$ 48.5 IU/L.
Keywords
Glucose; Lymphocyte; Tuberculous pericarditis;
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