We have performed 24 cascade filtration treatments in 8 patients with hyperviscosity syndrome (2 cases), essential mixed cryoglobulinemia, post-hepatitic cryoglobulinemia, Sjogrens disease, rheumatoid vasculitis, Miller-Fisher syndrome and chronic dysimmune polyneuropathy. New cellulose diacetate
Newly developed hollow fiber membrane filters made of ethylene-vinyl-alcohol designated as EVAL 2A, EVAL 4A, and EVAL 5A, were tested in vitro and applied clinically. EVAL 2A had the lowest molecular weight cut-off (30% rejection rate for 10(4) dalton dextran and 90% rejection rate for 10(5) dalton