[A clinical evaluation of enzymologic methods for the differential diagnosis of viral hepatitis and subhepatic jaundice].

Enzymological examination of 113 patients with A and B viral hepatitis (VH) and 41 with obstructive jaundice of tumor origin and 32 with chronic cholecystitis during exacerbation showed an increase of activity of blood serum lactate dehydrogenase (LDG), gamma-glutamyltranspeptidase (GGTP), alkaline phosphatase. The GGTP/LDG ratio is of differential-diagnostic value. Ratio values of 0.8 and less indicate VH while values of 1 and more indicate obstructive jaundice.