100 patients of our kidney transplantation program and uneventful as regards their liver history were indexed by the pulsatile flow (PFI) of the hepatic artery and the damp curve (DI) of the hepatic veins. The average age of the patients was 36 years (20-50y). The pulsatile flow index (PFI) was calculated as 0.4 to 0.7. The damp index (DI) as 0.3 to 0.54. In 10 of these volunteers the measurement was performed 3 times per day for 5 days: there was no difference to be found in comparison to the values of the total group. The presented values of the PFI and DI give the normal range and will be the basis for further investigations in patients after liver transplantation or suffering from liver diseases.