Changes of haemorheological parameters when using plasma exchange, selective adsorption and membrane differential separation.

At present, conventional haemorheotherapy consists of changes in life-style, drug therapy and haemodilution. Extracorporeal therapy has been considered only for the treatment of hyperviscosity syndromes. However, a wide range of viscosity-related syndromes may be amenable to rheological therapy if appropriate techniques were available. According to our data, plasma exchange, selective adsorption and membrane differential filtration may lead to an improvement of haemorheology and clinical conditions. For reasons of economy and feasability, membrane differential filtration is favoured over other techniques of differential separation therapy.