Immunoassay and immunoassay apparatus

G - Physics – 01 – N

Patent

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Details

G01N 33/53 (2006.01) G01N 15/14 (2006.01) G01N 33/543 (2006.01) G01N 15/00 (2006.01)

Patent

CA 2373139

An immunoassay comprises the steps of: (a) mixing a whole blood sample with sensitized insoluble carrier particles smaller than erythrocytes to cause an immune agglutination reaction; (b) introducing the resulting immune agglutination reaction mixture including agglutinated particles and unagglutinated particles to a flow cell, irradiating the particles passing through the flow cell with laser light, and detecting scattered lights generated thereby; (c) setting a threshold value for distinguishing unagglutinated particles from agglutinated particles and a threshold value for distinguishing the agglutinated particles from blood cells with regard to intensity of the scattered light; and (d) distinguishing and counting the unagglutinated particles, the agglutinated particles and the blood cells from the scattered lights detected in the step (b), in reference to the threshold values set in the step (c).

L'invention concerne un processus de dosage immunologique consistant (a) à mélanger un échantillon de sang entier avec des particules porteuses insolubles sensibilisées, de taille inférieure à des érythrocytes, afin de provoquer une réaction d'agglutination immunitaire ; (b) à introduire le mélange de réaction d'agglutination immunitaire résultant, contenant des particules agglutinées et des particules non agglutinées, dans une cuve à circulation, à soumettre les particules passant au travers de la cuve à circulation à un rayonnement laser, et à détecter la lumière diffusée ainsi produite ; (c) à fixer une valeur seuil pour distinguer les particules non agglutinées des particules agglutinées, et une valeur seuil pour distinguer les particules agglutinées de globules en fonction de l'intensité de lumière diffusée ; et (d) à distinguer et compter les particules non agglutinées, les particules agglutinées et les globules à partir de la lumière diffusée détectée à l'étape (b), en fonction des valeurs seuil fixées à l'étape (c).

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