[Plasma exchange by cascade filtration. Clinical and biological study].

Nineteen double-filtration plasma exchanges were performed in 8 patients selected according to the presence or absence of disease-related and/or patient-related risk factors. The haemofiltration system consists of 2 filters with different pore sizes. The first filter, called plasma separator (Asahi plasmaflo HI-05), separates plasma from whole blood; the second filter, called plasma filter (Asahi XK-60; Kuraray Eval 2A or 4A), separates high molecular weight components from plasma.

Technical and clinical aspects of cascade filtration plasma exchange (CFPE).

Cascade filtration plasma exchanges (CFPE) were realized using an hemofiltration system (HFS) coupled to 2 filters with different pore sizes. The first one (F1 = plasma-separator; Asahi plasmaflo HI-05) separates plasma from whole blood, the second one (F2 = plasma filter; Asahi XK-60, Kuraray EVAL 2A or 4A) filtrates high molecular weight (MW) components from the separated plasma. F2 filtrate returns to patient mixed with blood cells and 4% Albumin solution or Plasmion R replacing plasma discarded (about 0.

Improvement of the demonstration of A, B, H surface antigens in bladder tumors by a simple immunofluorescence technique.

The presence of A, B and H blood group antigens in paraffin-embedded tissue sections was demonstrated with a routine direct and indirect immunofluorescence technique. Natural and human antisera were used for 102 biopsy specimens of the various blood groups, including normal mucosa and vesical tumors. This technique allows a more precise description than the specific red cell adherence reaction of the differentiation pattern of the tumor itself and of the surrounding and distant mucosa.