[Circulating platelet aggregates during haemodialysis].

In eight chronically haemodialysed patients a significant increase of circulating platelet aggregates (method of Wu and Hoak) was observed immediately after starting haemodialysis. The number of aggregates decreased at the end of haemodialysis reaching the starting values after 360 min. The platelet interaction with the dialysis membrane surface might cause this phenomenon. Anticoagulation with heparin alone was insufficient in preventing aggregate formation during haemodialysis.