Systems and methods for determining an amount of blood in a...

G - Physics – 01 – N

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G01N 33/48 (2006.01) G01N 33/52 (2006.01) G01N 35/00 (2006.01) G06F 19/00 (2011.01) G01N 21/64 (2006.01) G01N 21/76 (2006.01)

Patent

CA 2715567

Systems, methods and apparatus for determining an amount of blood in a blood culture are provided where an initial biological state and then periodic measurements of the biological state of the culture are taken. For each respective measurement, a normalization relative value between the respective measurement and the initial measurement is made thereby forming normalization relative values. For each interval of time points represented by the normalization relative values, a first derivative of the normalization relative values in the interval is made thereby forming a plurality of rate transformation values. For each set of rate transformation values in the plurality of rate transformation values, an average relative transformation value is computed, thereby forming average relative transformation values. A lookup table that matches a measure of central tendency of the average relative transformation values to a blood amount is used to determine the amount of blood in the culture.

L'invention concerne des systèmes, des procédés et un appareil permettant de déterminer une quantité de sang dans une culture de sang, de prélever un état biologique initial puis d'effectuer des mesures périodiques de l'état biologique de ladite culture. Pour chaque mesure correspondante, on établit une valeur relative de normalisation entre la mesure correspondante et la mesure initiale, ce qui permet de former des valeurs relatives de normalisation. Pour chaque intervalle temporel représenté par les valeurs relatives de normalisation, un premier dérivé des valeurs relatives de normalisation dans ledit intervalle est établi pour former une pluralité de valeurs de transformation de vitesse. Pour chaque ensemble de valeurs de transformation de vitesse dans ladite pluralité, on calcule une valeur de transformation de vitesse relative moyenne, ce qui permet de former des valeurs de transformation relatives moyennes. Un tableau de recherche qui fait correspondre une mesure de tendance centrale des valeurs de transformation relatives moyennes à une quantité de sang utilisée pour déterminer la quantité de sang dans ladite culture.

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