Table 6.

Upper bound on hollow fiber membrane hydraulic properties estimated from the ultrafiltration factor measurements of Snyder et al. [11] obtained by varying the perfusate flow rate into microdialysis probes with 4-mm membrane lengths.

Membrane	Nominal molecular weight cutoff	Hm	κm ×1013
	Daltons	$\frac{\mu \text{L}}{{\text{min}·\text{cm}}^{\text{2}}·\text{cm}{\text{H}}_2\text{O}}$	cm2
Polyacrylonitrile	29,000	0.043	0.34
Polycarbonate	20,000	0.021	0.17
Cuprophan	6,000	0.016	0.06