[Plasma separation with membranes--examinations in man (author's transl)].

Plasma separation was carried out using a new cellullose diacetate hollow-fibre module. The pore size of the membranes used was 0.2 micrometer and the cut-off at approximately 3 million dalton. Five litres of filtrate was separated in 80 min. The protein content of the filtrate was 60% of that in the blood plasma. When plasma and filtrate were compared, there was little difference inthe proportions of the immunoglobulins. At the end of treatment, the immunoglobulin content of the plasma had been reduced to 40% of its initial concentration.