Figure shows the in vivo permeability of the OP-05W¹⁾ to various plasma components up to 3 liter of plasma perfusion volume.

¹⁾ OP-05W is brand name in Japan, and subtantially equivalent to OP-05W(L).
Quoted from Nagano et al. Jpn J Aphereisis 16(1): 297-298, 1997

Plasma and proteins pass through the membrane but the pores are small and cellular components cannot pass across the membrane. Plasma and pathogenic substances in the plasma can be discarded or purified and returned to the patient.