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  • Title: Tuberculous peritonitis: diagnostic value of ascitic fluid pH and lactate.
    Author: Sánchez-Lombraña JL, de la Vega J, Fernández E, Linares A, Pérez R, Sotorrío NG, Rodríguez M, Rodrigo L.
    Journal: Scand J Gastroenterol; 1995 Jan; 30(1):87-91. PubMed ID: 7701257.
    Abstract:
    BACKGROUND: The analytical pattern of ascitic fluid in peritoneal tuberculosis is frequently similar to that found in other causes of ascites. The diagnostic value of the ascitic fluid pH and lactate in cases of tuberculous peritonitis has not yet been established. METHODS: Ascitic fluid pH, lactate, total proteins, cell count, lactate dehydrogenase, glucose, and their blood-ascitic gradients were determined in 10 patients with tuberculous peritonitis (group I). These results were compared with those obtained from 40 patients with cirrhotic sterile ascites (group II), 16 patients with spontaneous bacterial peritonitis (group III), and 18 patients with malignant ascites (group IV). RESULTS: A decreased pH and an elevated lactate level in ascitic fluid were found in patients in group I in comparison with those in group II (p < 0.001). No significant differences were found between group I and groups III and IV. The arterial blood-ascitic fluid pH gradient was more than 0.10 (p < 0.001), and the ascitic fluid-serum lactate gradient was greater than 15 mg/dl (p < 0.001) in group I when compared with group II. No significant differences were found between group I and groups III and IV. CONCLUSIONS: Ascitic fluid pH and lactate are useful markers in differentiating tuberculous peritonitis from cirrhotic sterile ascites. However, these variables lack specificity, as they are also decreased and increased, respectively, in cases of malignant ascites and spontaneous bacterial peritonitis.
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