Abstract
A newly-improved method using radioisotope-labeled urea was employed to determine solute permeability for four tubular membranes before and after treatment. Both solute and hydraulic permeability allow determination of structural changes in membrane pore. The pure water permeability decreases after the treatment with blood for any dialysis membranes tested. The slight decline in the pure water permeability was observed for the regenerated cellulose membranes because of their weak binding capacity to various solutes in blood.
