Apparatus and method for analytical determinations

G - Physics – 01 – N

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G01N 27/416 (2006.01) G01N 27/07 (2006.01) G01N 33/487 (2006.01)

Patent

CA 2494090

An apparatus and method for measuring conductance are provided. The method and apparatus are particularly well adapted for use with a removable or replaceable cartridge (10) in a blood analysis system. The apparatus generally involves providing a system having a first, unfiltered, conductance measurement cell and a second filtered, conductance measurement cell (20, 20a, 20b, 20c) and a second, filtered, conductance measurement cell (21, 21a, 21b, 21c). The preferred method involves relating values measured in the two cells for a whole blood sample and for a known calibrant together, to obtain a value, for example hematocrit, for the unknown whole blood sample.

L'invention concerne un appareil et un procédé de mesure de conductance. Le procédé et l'appareil sont particulièrement bien adaptés à être utilisés avec une cartouche amovible ou remplaçable dans un système d'analyse de sang. L'appareil comprend généralement un système comportant une première cellule de conductance, sans filtre, et une seconde cellule de mesure de conductance avec filtre. Le procédé préféré consiste à associer des valeurs mesurées dans les deux cellules pour un échantillon de sang complet et pour un témoin d'étalonnage connu, afin d'obtenir une valeur, par exemple l'hématocrite, concernant l'échantillon de sang complet inconnu.

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