[Hemorheologic effects of hydroxyethyl starch 200/0.5, dextran 40, oxypolygelatine and full electrolyte solution over 48 hours].

Four patient groups (n = 28 patients) received in a randomised clinical trial a single intravenous infusion of 500 ml of 10% dextran 40, 3.5% oxypolygelatine, 6% hydroxyethyl starch 200/0.5 or saline solution, respectively. The haemorheological parameters haematocrit, plasma viscosity and erythrocyte aggregation were followed up during 48 hours. In our study oxypolygelatine showed better rheological results than HAES 200/0.5. Dextran 40 especially increased the plasma viscosity and erythrocyte aggregation, so that we cannot recommend this plasma substituent for hypervolemic haemodilution.