Dextran 40 oder HAES 200/0,5? - Hämorheologie der Langzeitbehandlung beim ischämischen zerebralen Insult

Haemorheological parameters on long-term treatment of ischaemic stroke were measured in two groups of 12 patients receiving dextran 40 or hydroxyethyl starch (HES 200). Both substances similarly lowered haematocrit and whole-blood viscosity. Dextran produced a clear-cut increase in plasma viscosity and red-cell aggregation. The effects were due to a marked increase in the plasma concentration of dextran caused by an accumulation of large molecules. HES 200 improved plasma viscosity and red-cell aggregation. Since these haemorheological parameters are of special importance for improving a disordered microcirculation as would occur at the margins of the ischaemic lesion, HES 200 would seem to be the appropriate plasma expander in long-term treatment with haemodilution. The differences between dextran 40 and HES 200 become the more marked the higher the volume infused.