Undried cellulose gel film-- a high permeability dialysis membrane.

Undried cellulose gel film manufactured by British Cellophane Ltd (BCL) has been evaluated in vivo and in vitro. Results obtained indicate that undried cellulose gel film is superior in terms of ultrafiltration and middle molecular clearance to the widely used Cuprophan membrane and comparable with the Rhône Poulenc AN69 Acrylopolynitrile membrane for middle molecular clearance. The gel film is suitable for use with conventional dialysis equipment and in terms of residual blood volume, leak rate and pyrogenicity is indistinguishable from cuprophan.