[Modification of uremic thrombocytopathy by hemodialysis]

By means of in vitro screen pressure measurement the functions of thrombocytes were detected in dialysis patients before and immediately after dialysis. Start values are below the normal region as a sign of uraemic thrombocytopathia. The expected improvement after dialysis was not to be seen. As a cause of deterioration an activation of the thrombocytes at the surfaces of the capillary kidney and an incomplete inhibition of this process by heparin is discussed.