A pump for biological fluids

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/00 (2006.01) F04B 43/08 (2006.01) F04B 43/12 (2006.01) A61M 1/10 (2006.01)

Patent

CA 2122600

The invention relates to a pump for biological fluids, for example for blood transference by pump. The pump according to the invention comproses a housing (1) in which there are placed at least one resilient tube (3) for passing biological fluid, and an operating head (5) rotated in the direction of fluid transference and including at least one roller member (6) to bear against the tube (3), said roller member (or each roller member) comprising at least two rollers (7,8) positioned in series so that the roller (7) of said roller member which is preceding in the direction of the operating head rotation allows greater tube (3) aperture than does the roller (8) of the same member (6) that follows. The pump has simple and convenient means for adjusting the degree of compressing the tube (3) by the rollers (7,8) and ensures blood transfusion causing practically no damage to the blood cells. (Fig.1)

L'invention concerne une pompe pour les liquides biologiques, par exemple, pour le transfert de sang au moyen d'une pompe. La pompe selon l'invention comporte un logement (1) dans lequel sont disposés au moins un tube souple (3) dans lequel circule le liquide biologique et une tête de commande (5) orientée dans la direction du transfert de liquide et comprenant au moins un élément cylindre (6) s'appuyant contre le tube (3). L'élément cylindre susmentionné (ou chaque élément cylindre) comprend au moins deux cylindres (7, 8) disposés en série de sorte que le cylindre (7) de l'élément cylindre susmentionné qui précède dans la direction de la rotation de la tête de commande permet une plus grande ouverture du tube (3) que le cylindre (8) du même élément (6) qui suit. La pompe comporte un moyen simple et pratique de régler le degré de compression du tube (3) par les cylindres (7, 8) et assure une transfusion sanguine ne causant pour ainsi dire aucun dommage aux cellules sanguines (fig. I).

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