Extracorporeal blood processing methods and apparatus

A - Human Necessities – 61 – M

Patent

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A61M 1/36 (2006.01)

Patent

CA 2270110

Improved extracorporeal blood processing methods and apparatus are disclosed. In one aspect of the invention, an extracorporeal method for the collection of platelets and red blood cells, and if desired plasma, is provided, wherein the collection of platelets and red blood cells may occur in differing time periods utilizing the same blood processing vessel. The flow of blood to the blood processing vessel and return of uncollected blood components may be provided via a single needle, wherein blood is removed and returned to a donor/patient during alternating blood removal and blood return submodes. Prior to red blood cell collection, a set-up phase may be carried out during which a predetermined hematocrit and AC ratio is established.

L'invention concerne des procédés et un dispositif perfectionné de traitement extracorporel du sang. Selon un de ses aspects, l'invention concerne un procédé de collecte extracorporelle des plaquettes et des globules rouges du sang, et si nécessaire de plasma, qui peut être effectué au cours de périodes différentes, au moyen du même récipient de traitement du sang. Le prélèvement de sang destiné au récipient de traitement du sang et la restitution des composants sanguins non prélevés peuvent être effectués au moyen d'une même aiguille, le sang étant prélevé et restitué à un donneur/patient au cours de sous-modes alternants de prélèvement et de restitution du sang. Avant le prélèvement des globules rouges, il est possible d'effectuer une phase de préparation au cours de laquelle on établit l'hématocrite et le taux d'anticoagulants (AC).

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