[Uremic plasma as cause of metabolic changes in red blood cells].

Under the influence of the uraemic plasma a number of changes of the metabolism of red blood cells develop. By means of cross experiments with the help of filtrability, of sulf-haemoglobin formation and the 125-iodine-hippuran intake the influence of the uraemic plasma and of the plasma of healthy persons on the red blood cells of children who undergo a chronic haemodialysis as well as of healthy adults (cross experiments) was examined. The red blood cells of the control persons after an incubation at 37 degrees and 60 or 180 minutes showed approximately the same changes of filtrability, formation of sulf-haemoglobin and 125-iodine-hippuran as the red blood cells of the patients with incubation in the autologous plasma. Disturbances of the filtrability and the formation of sulf-haemoglobin could be proved in the uraemic red blood cells still after reincubation in the normal plasma, though clearly reduced. Only in 125-iodine-hippuran a normalisation could be got. Filtrability and formation of sulf-haemoglobin apparently comprise more complex processes which essentially influence the life span of the red blood cells, whereas the 125-iodine-hippuran value characterizes only a part of the metabolism of the red blood cells, the passive transport of anions.