Lysing reagent for simultaneous enumeration of different...

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G01N 35/00 (2006.01) G01N 15/12 (2006.01) G01N 33/72 (2006.01)

Patent

CA 2584146

A combined diluent and lysing reagent for simultaneously counting or analysis of various blood cells such as thrombocytes, leukocytes and leukocyte subpopulations, as well as analysis of hemoglobin. The reagent comprises a hemoglobin stabilizing/methemoglobin ligand compound selected from the group consisting of imidazole, imidazole derivatives, and combinations thereof, at least two quaternary ammonium salts, 1,3-dimethylurea and/or salts thereof; and an organic buffer. Accordingly, the reagent can be used in a method for determining the content of blood cells in a blood sample comprising: mixing a blood sample with a reagent according to the invention; and analyzing the content of the blood sample by employment of the Coulter principle and optionally an spectrophotometric analysis of the hemoglobin content.

L'invention concerne un diluant et un réactif lysogène combinés permettant de compter ou analyser simultanément diverses cellules sanguines telles que thrombocytes, leucocytes et sous-populations de leucocytes, ainsi que d'analyser l'hémoglobine. Le réactif comprend un composé stabilisateur d'hémoglobine/ligand de méthémoglobine choisi dans le groupe comprenant imidazole, dérivés d'imidazole et combinaisons de ceux-ci, au moins deux sels d'ammonium quaternaires, 1,3-diméthylurée et/ou sels de celle-ci, et un tampon organique. En conséquence, ce réactif peut être utilisé dans un procédé permettant de déterminer le contenu de cellules sanguines dans un échantillon sanguin consistant à mélanger un échantillon sanguin avec le réactif de cette invention puis à analyser le contenu de cet échantillon sanguin par mise en oeuvre du principe de Coulter et éventuellement une analyse spectrophotométrique du contenu d'hémoglobine.

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