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Polyether-polycarbonate hollow fibers, spun by the phase inversion method, yield a dialysis membrane with a limited ultrafiltration coefficient but high diffusive permeability. Dialysers are made out of this membrane and are sterilized by gamma radiation. The dialysers show controlled ultrafiltration and clearance values for smaller molecular weight substances in the range of cellulosic membranes, but for larger molecular weight substances the clearances are higher. Correlation for ultrafiltration and clearance values, measured in saline and whole blood, indicate low interactions between blood and membrane.

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