Selective membrane/sorption techniques for salvaging blood

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/36 (2006.01) A61M 1/34 (2006.01) B01D 61/00 (2006.01) B01D 61/14 (2006.01) B01D 61/24 (2006.01) B01D 63/04 (2006.01)

Patent

CA 2247031

Methods and apparatuses for salvaging blood from a patient are disclosed. A blood salvaging circuit (140) coupled to a cardiopulmonary bypass circuit (144) includes a hemoconcentrator (152) and a sorbent-containing plasma separator. A combination device (142) for salvaging blood includes a closed plasma chamber (172) containing a plasma chamber solution (176), a hollow fiber plasma-separating membrane (156) for receiving blood and permitting plasma to be transported therethrough into the plasma chamber solution (176) and for refiltering the treated plasma back into the blood salvaging circuit (140), a selective sorbent (180) for contacting the selected solute in the plasma and binding the selected solute and an ultrafiltration membrane (184) for removing water, fluids and low molecular weight components from the plasma.

Méthodes et appareils pour récupérer le sang d'un patient. Le circuit de récupération du sang (140) couplé à un circuit de circulation extracorporelle (144) comprend un hémoconcentrateur (152) et un séparateur de plasma contenant un sorbant. L'appareil combiné (142) de récupération du sang comporte une chambre à plasma fermée (172) contenant une solution pour chambre à plasma (176), une membrane creuse en fibre pour la séparation du plasma (156) qui reçoit le sang et permet au plasma de la traverser pour se retrouver dans la solution de la chambre à plasma (176) et qui refiltre le plasma traité à son retour dans le circuit de récupération du sang (140), un sorbant sélectif (180) qui entre en contact avec le soluté choisi du plasma et qui se lie au soluté choisi et une membrane d'ultrafiltration (184) qui retire l'eau, les liquides et les composés de faible poids moléculaire du plasma.

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