Patent ID: 7025212
Filing Date: 2006-04-11
Classification: B01D

Abstract:
1. A plasma-or serum-collecting device which comprises a blood-filtering unit in a test tube, wherein the blood-filtering unit comprises; a blood-filtering material in the form of a cylinder with a center hole therein; a holder having an inner wall and a bottom and which has a filter chamber having a volume of 0.5 to 2.5 ml for accommodating the blood-filtering material and comprises a blood inlet on one side, a filtrate outlet on another side and a hollow shaft therebetween, the hollow shaft being inserted into the center hole of the blood-filtering material and having a cylindrical face with passages for liquid therein and a sealed end, and wherein the blood-filtering material is located so as to have a space between the inner wall of the holder and the blood-filtering material and between the bottom of the holder and the blood-filtering material and wherein the blood-filtering material comprises glass fibers located on the blood inlet side and microporous membrane located on the filtrate outlet side.