Factor VIII complex in uraemia and effects of haemodialysis.

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Abstract
Levels of the factor VIII complex were found to be raised in patients with chronic renal failure and further raised by regular dialysis. Increased fibrinogen concentrations were also found. These results suggest the existence of a prothrombotic state in uraemia that is exacerbated by haemodialysis. Ristocetin-induced platelet agglutination, however, was depressed in uraemia and worsened by dialysis. This defect may be transferred to normal platelets from dialysed uraemic plasma, suggesting the existence of an inhibitor of the interaction between factor VIII and platelet glycoprotein. These results may help to explain the anomaly of a prolonged bleeding time together with accelerated atherogenesis that is found in patients with uraemia receiving dialysis.