Medical Textiles
Permeability goes with the square of pore radius. A small change in the spinning of the membrane is a large change in what the dialyser removes.
— mL/h
Across the whole bundle at the working pressure
Decision-support only. Parallel-capillary flow ignores concentration polarisation and the protein layer that forms on the blood side within minutes, both of which reduce real ultrafiltration well below this. Dialyser KUf is established by the manufacturer under standardised in vitro conditions, and prescription is a clinical decision.
Dialysis Hollow Fibre Membrane Permeability & Ultrafiltration — free, with the formula and a worked example, at Textile School.