Plasma on demand tube

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G - Physics

01

N

G01N 33/49 (2006.01) B01L 3/14 (2006.01)

Patent

CA 2550838

A device for separating plasma from whole blood is provided having an evacuated primary collection chamber capable of fluid communication through a porous filter to an evacuated secondary collection chamber. An agglutinating agent its provided within the primary collection chamber so as to aggregate blood cells within a whole blood sample. The porous filter has a pore size which is small enough to capture the aggregated blood cells therein, yet large enough to permit plasma to transfer therethrough under pressures associated with conventional evacuated blood collection tubes. The primary and secondary collection chambers may be provided in separate containers or tubes, with transfer occurring therebetween through a transfer device including the porous filter therein.

Dispositif destiné à séparer le plasma du sang total et présentant une chambre de collecte primaire sous vide, apte à entrer en communication fluidique avec une chambre de collecte secondaire sous vide à travers un filtre poreux. Un agent agglutinant est prévu dans la chambre de collecte primaire pour amener les cellules sanguines dans un prélèvement de sang total à s'agréger. Les pores du filtre poreux sont de dimensions suffisamment faibles pour capturer les cellules sanguines agrégées, tout en étant suffisamment larges pour permettre au plasma de traverser sous des pressions associées aux tubes de collecte de sang sous vide classiques. Les chambres de collecte primaire et secondaire peuvent être prévues dans des tubes ou récipients séparés, le transfert entre les deux ayant lieu via un dispositif de transfert qui contient un filtre poreux.

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