Patent ID: 7854845

Claim:
A method of processing biological fluid comprising: a) providing a biological fluid filtration device having a first inlet, a first outlet, and a first vent, and defining a first fluid flow path between the first inlet and the first outlet, and having at least one first filter element interposed between the first inlet and the first outlet and thereby causing a first quantity of biological fluid, completely separate and distinct from a second quantity of biological fluid, being filtered to flow through the at least one first filter element and out the first outlet, said biological fluid filtration device further having a second inlet, a second outlet, and a second vent, and defining a second fluid flow path between the second inlet and the second outlet, and having at least one second filter element interposed between the second inlet and the second outlet and thereby causing a second quantity of biological fluid, completely separate and distinct from the first quantity of biological fluid, being filtered to flow through the at least one second filter element and out the second outlet with said biological fluid filtration device containing a solid partition wall interposed between the first fluid flow path and the second fluid flow path, thereby completely isolating the first fluid flow path from the second fluid flow path, b) passing a first quantity of biological fluid through said first fluid flow path and c) passing a second quantity of biological fluid through said second fluid flow path.