Fasting serum total bile acid (SBA) levels were estimated by enzymatic fluorometry (EF) in 36 subjects without liver disease, 28 with hepatic lesions and impaired hepatic function, and 79 with hepatic lesions and normal function. Fasting and postprandial EF-SBA levels were compared in nine normal subjects and nine patients with cholestasis, and SBA assays by EF and gas-liquid chromatography (GLC) were compared in 28 patients with hepatic lesions and impaired function. Levels of SBA were below 9 mumole/L in all but two of the 36 subjects without liver disease, and above that level in all 28 with impaired hepatic function and 17 (24%) of the 70 with hepatic lesions and normal liver function. In most subjects, EF detected notable postprandial rises in SBA. Enzymatic fluorometric and GLC-SBA values were closely correlated (coefficient of correlation, 0.869).
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