Blood processing systems and methods for collecting mono...

B - Operations – Transporting – 04 – B

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B04B 5/00 (2006.01) B04B 5/04 (2006.01) B04B 13/00 (2006.01) A61M 1/30 (2006.01) A61M 1/36 (2006.01)

Patent

CA 2221731

Systems and methods for separating mono nuclear cells from whole blood rotate a separation compartment (38) about a rotational axis. Whole blood is introduced from an inlet region (74) into a first region (76) of the chamber during its rotation to separte the whole blood into a plasma constituent, red blood cells and interphase between the red blood cells and the plasma constituent. The interface contains mono nuclear cells. While conveying whole blood into the first region, the plasma constituent is collected in the first region, while collecting the red blood cells in a second region of the chamber spaced away from the inlet region. Red blood cells are than conveyed into the second region (78) in a back flow direction toward the inlet region. While conveying red blood cells into the second region, the mono nuclear cells are collected in the first region.

La présente invention concerne des systèmes et des procédés permettant de séparer les éléments mononucléés du sang entier. Un compartiment de séparation (38) tourne autour d'un axe de rotation. Du sang entier est introduit, depuis une zone d'entrée (74), dans une première zone (76) de la chambre pendant sa rotation, pour diviser le sang entier en plasma, globules rouges et une interface entre les globules rouges et le plasma. L'interface contient des éléments mononucléés. Tandis que du sang entier est amené dans la première zone, le plasma est recueilli dans la première zone, pendant que les globules rouges sont recueillis dans une deuxième zone de la chambre, qui est à une certaine distance de la première. Les globules rouges sont ensuite amenés dans la deuxième zone (78), en sens inverse, vers la zone d'entrée. Pendant que les globules rouges sont amenés dans la deuxième zone, les éléments mononucléés sont recueillis dans la première.

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