Patent ID: 7407742

Claim:
A plasma or serum separator for isolating plasma or serum from whole blood, said separator comprising: a blood separation member, a holding member covering and holding the blood separation member; a blood introducing portion formed in a portion of the holding member covering a proximal end portion of the blood separation member; and a plasma or serum sampling aperture formed in a portion of the holding member covering a distal end portion of the blood separation member, wherein the whole blood is introduced into the blood separation member through the blood introducing portion, and the introduced whole blood is separated such that the plasma or serum is located in the distal end portion of the blood separation member, while blood cells are located in the proximal end portion of the blood separation member; thereby enabling the plasma or serum located in the distal end portion of the blood separation member to be sampled through the plasma or serum sampling aperture, wherein the blood separation member is made of a fibrous material and/or a porous material, and wherein the fibrous material and/or the porous material (A) is one kind or two or more kinds selected from the group consisting of glass fibers, non-woven fabrics, cellulose fibers, polyester, polypropylene, polyamide, polyethylene, polyurethane and polyvinyl formal, and (B) is coated with propanol with a butoxy group and/or acrylamide with a butoxy group.