Table 1.

Sieving coefficients of large pore membranes and conventional pore membranes

		Cytokine
Membrane	Operating characteristics	IL-8 (MW = 8 kDa)	TNFα (MW = 17 kDa)	IL-1 (MW = 17 kDa)	IL-10 (MW = 17 kDa)	IL-6 (MW = 26 kDa)	Albumin (MW = 69 kDa)
100 kDa polyamide [20]	1 l/h	0.31	0.27	0.81	0. 56	0.73	0.06
	6 l/h	0.19	0.09	0.75	0. 56	0.32	0.0
Polyamide* [21]	Variable	0.25	0	0.18		0
Polysulfone* [22]		0.12	0.22	0.42	0	0.04
AN69** [23]		0.08	0.16	0.22	0	0.18

TNFα, tumor necrosis factor alpha; MW, molecular weight. Mean molecular weight cut-off (MWCO) of 30 kDa is shown in the table by the sign ^* and the MWCO of 50 kDa is shown in the table by the sign ^**.