Method and apparatus for measuring white blood cell count

C - Chemistry – Metallurgy – 12 – Q

Patent

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Details

C12Q 1/06 (2006.01) C12M 1/34 (2006.01) C12Q 1/44 (2006.01) G01N 21/77 (2006.01) G01N 21/78 (2006.01) G01N 33/49 (2006.01)

Patent

CA 2486685

A method for the quantitatively measuring white blood cell count involves capture of white blood cells from a fluid sample by retainer (3), removal of the red blood cells and other interfering substances by a wash solution, and reading the result of a color reaction in which an ester which is present on the white blood cells cleaves a chromogenic substrate which produces a water insoluble dye. The apparatus (10) for use in the present method includes a retainer (3) for white blood cells that optionally has a dye substrate immobilized therein and an absorption layer (4) that wicks and takes up all excess washing solution flowing past the sample.

L'invention concerne une méthode permettant de mesurer quantitativement le nombre de leucocytes dans le sang, consistant à capturer des leucocytes à partir d'un échantillon liquide, à l'aide d'un dispositif de rétention (3), à retirer les érythrocytes et les autres substances susceptibles d'interférer dans les résultats, à l'aide d'une solution de lavage, puis à lire le résultat d'une réaction colorée au cours de laquelle un ester présent sur les leucocytes coupe un substrat chromogène qui produit un colorant insoluble dans l'eau. L'appareil (10) destiné à être utilisé dans la présente méthode comprend un dispositif de rétention (3) pour leucocytes dans lequel sont éventuellement immobilisés un substrat à colorant et une couche d'absorption (4) qui absorbe tout l'excédent de solution de lavage passant par l'échantillon.

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