Filtration media and device for filtering leukocytes

Details Filtration media and device for filtering leukocytes Filtration media and device for filtering leukocytes

B - Operations, Transporting

01

D

B01D 69/12 (2006.01) A61M 1/34 (2006.01) B01D 29/01 (2006.01) B01D 39/08 (2006.01) B01D 39/18 (2006.01) B01D 39/20 (2006.01) B01D 61/18 (2006.01) A61M 1/02 (2006.01) A61M 1/36 (2006.01)

Patent

CA 2155732

The filter device (16) for removing leukocytes is disclosed. The outer housing (18) enclosing the filter pad assembly (20) includes two sheets (44, 46) of flexible plastic material. The filter device (16) includes tangential side ports (36, 38) as an inlet and an outlet. The filter pad assembly (20) includes a composite of three media regions (28, 30, 32) including non- contiguous layers (40) having an overall thickness of greater than about 6 mm but not more than about 10 mm. Each non-contiguous layer (40) comprises an interlocked matrix of polyester fibers, fiberglass fibers, and cellulose acetate fibrets. The matrix has a number average fiber diameter no greater than about 0.23 micron.

Filtre (16) destiné à extraire des leucocytes. Le logement extérieur (18) renfermant l'ensemble tampon filtrant (20) comprend deux feuilles (44, 46) en matière plastique souple. Le filtre (16) comprend des orifices latéraux tangentiels (36, 38) faisant office d'entrée et de sortie. L'ensemble tampon filtrant (20) comprend une combinaison de trois régions de milieu (28, 30, 32) comprenant des couches non contiguës (40) d'une épaisseur globale supérieure à environ 6 mm, mais non supérieure à environ 10 mm. Chaque couche non contiguë (40) comprend une matrice enchevêtrée de fibres de polyester, de fibres de verre et de fibrilles d'acétate de cellulose. Ladite matrice présente un diamètre de fibres moyen au nombre non supérieur à environ 0,23 microns.

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