Response of the vascular system to different modifications of haemofiltration and haemodialysis.

In order to evaluate the reasons for the better tolerance of the cardiovascular system to body fluid removal in HF, different modifications of single-pass and recirculation HD as well as post-dilution HF were applied in 6 patients with stable chronic renal insufficiency under identical conditions of fluid removal, Curea and use of dialysers. A remarkable tolerance of the vascular system could be observed in HF as in HD when the Na+ concentration in the dialysis or diluting fluid was raised from 130 to 150mEq/L or when plasma osmotic pressure was stabilised by i.v.