Patent ID: 8097162
Filing Date: 2012-01-17
Classification: A61M,A61P,B01D,G01N

Abstract:
1. A system for performing blood treatment, comprising: a rectangular membraneless channel with inlet and outlet ends spaced apart across a length of the membraneless channel, the membraneless channel having a fluid inlet at the inlet end for receiving blood, and first, second, and third fluid outlets at the outlet end; the fluid inlet being connected to a patient access for receiving blood; the first and second fluid outlets being disposed on opposite facing walls of the membraneless channel at the outlet end, the first and second fluid outlets each having a filter therein forming a portion of a respective one of the opposite walls; each of the filters being configured and arranged so that it forms a single continuous interior-facing surface with a respective one of the facing walls of the membraneless channel; an external channel connected to the first and second fluid outlets and configured to receive and combine the flow of plasma leaving the membraneless channel through the first and second outlets; and the third fluid outlet receiving the blood and being located between the first and second fluid outlets across a depth which is perpendicular to the length; wherein each of the filters has a regular array of pores whose diameters are less than 800 nm, each pore defining a non-serpentine, non-branching channel; wherein the depth is between 75 and 300 microns, and the membraneless channel has a width, perpendicular to the depth, that is at least ten times the depth; and the external channel being configured to convey the combined flow of plasma to a secondary treatment device with a membrane that extracts water from the combined flow of plasma and returns the result back to the membraneless channel.