Systems and methods for identifying and controlling...

G - Physics – 01 – N

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G01N 33/49 (2006.01) G01N 15/05 (2006.01)

Patent

CA 2195190

Systems and methods locate at least three spaced apart sensing units (24) in association with volume of blood comprising a first blood component interface region (16) between the first (14) and second (12) blood component regions. The systems and methods locate at least one of the sensing units (26) so that its optical field lies above the interface region (16) and at least one of the sensing units (26) so that its optical field lies below the interface region. Each sensing unit (26) senses the attenuation of energy emitted into blood in its optical field and generates a signal relating to the attenuation.

Ces systèmes et procédés permettent de placer au moins trois unités de détection (24) espacées les unes des autres, au voisinage d'un volume de sang comprenant une première région (16) d'interface d'un constituant sanguin, située entre la première (14) et la seconde (12) région de constituants sanguins. Ces systèmes et procédés permettent de placer au moins une des unités de détection (26), de manière que le champ optique de celle-ci soit situé au-dessus de la région d'interface (16), ainsi qu'au moins une autre de ces unités (26), de manière que le champ optique de celle-ci soit situé en dessous de la région d'interface. Chaque unité (26) détecte dans son champ optique l'atténuation d'énergie émise dans le sang et produit un signal se rapportant à cette atténuation.

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