Filter membranes for solution of physiologically active...

B - Operations – Transporting – 01 – D

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Details

B01D 69/02 (2006.01) A61L 2/02 (2006.01) B01D 61/14 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 71/10 (2006.01)

Patent

CA 2381208

Filter membranes to be used in efficiently eliminating pathogens such as viruses from solutions of drugs or physi-ologically active substances employed as starting materials thereof which are contaminated with pathogens such as viruses. These filter membranes, which can simultaneously achieve favorable performance of eliminating small viruses and a high physiologically active substance-permeability, can be obtained by controlling the membrane characteristics to give a ratio (BP/.gamma.) of the bubble point BP (MPa) to the surface tension .gamma.(N/m) of 110 or above, and/or logarithmic elimination ratios of swine parvovirus at 0 to 5 1/m2 filtration and at 50 to 55 1/m2 filtration of each 3 or above, and regulating the permeability for bovine immunoglobulin, wherein the monomer content amounts to at least 80%, to 70% or above. These filter membranes make it possible to provide drugs or starting materials therefor with little fear of the contamination with viruses, etc. and, therefore, are useful in the fields of pharmacy, medicine and the like. Image

Cette invention se rapporte à des membranes filtrantes servant à éliminer efficacement les agents pathogènes, tels que les virus, contenus dans des solutions de médicaments ou de substances physiologiquement actives utilisées comme ingrédients de départ de médicaments, contaminés par des agents pathogènes tels que des virus. On peut obtenir ces membranes filtrantes, qui peuvent posséder à la fois un effet favorable d'élimination des petits virus et une perméabilité élevée aux substances physiologiquement actives, en régulant les caractéristiques de la membrane, de façon à produire un rapport (BP/ gamma ) entre le point de bulle BP (MPa) et la tension de surface gamma (N/m) égal ou supérieur à 110 et/ou des rapports d'élimination logarithmique du parvovirus porcin à 0-5 l/m<2> de filtration et à 50-55 l/m<2> de filtration qui sont chacun égaux ou supérieurs à 3 et en régulant leur perméabilité pour l'immunoglobuline bovine, la teneur en monomère s'élevant à au moins 80 %, à 70 % ou plus. Ces membranes filtrantes permettent de produire des médicaments ou des ingrédients de départ de médicaments avec peu de risque de contamination virale, notamment, et elles sont par conséquent utiles en pharmacologie, en médecine et autres domaines apparentés.

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