Determination of the ketone body ratio in fulminant hepatic failure.

The ratio of acetoacetate to beta-hydroxybutyrate, the ketone body ratio, was measured in arterial blood from 28 patients with fulminant hepatic failure as an index of the hepatic energy charge. The ketone body ratio was significantly reduced in the total group of patients with fulminant hepatic failure as compared with control subjects (0.27 +/- 0.03 SE as compared with 0.48 +/- 0.03; p less than 0.001). Patients who survived had significantly less reduction of the ketone body ratio on admission than those who died (0.39 +/- 0.06, n = 10 as compared with 0.20 +/- 0.02, n = 19; p less than 0.02). In seven patients who died, in whom ketone body ratio was measured less than 12 hours before death there was a significant decrease in ketone body ratio as compared with that on admission (0.24 +/- 0.05 to 0.15 +/- 0.04; p less than 0.05). In contrast, in seven patients who survived there was no significant change in ketone body ratio when measured within 12 hours of regaining consciousness as compared with the figures on admission. Measurement of arterial ketone body ratio may give an indication of prognosis, and may be of use in testing the efficacy of treatments which aim to enhance hepatic regeneration or to remove toxic substances that may reduce the hepatic energy charge.