A method and apparatus for improving the accuracy with which...

A - Human Necessities – 61 – B

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A61B 8/00 (2006.01) A61B 8/06 (2006.01) G01F 1/66 (2006.01) G01P 5/24 (2006.01) G01S 15/58 (2006.01)

Patent

CA 2386144

The present invention relates to a method and associated apparatus for improving the accuracy with which the speed of a fluid, such as a liquid, in particular blood flowing in a duct, such as a blood vessel, in particular the aorta, is measured by means of a signal emitted by a Doppler transducer (4). In characteristic manner, according to the method, the Doppler transducer is associated with a programmable memory (50) which contains at least one correction data item for correcting the Doppler signal transmitted by the transducer (4) to a transducer control and computer unit (8). Said computer unit (8) incorporates said signal correction data item in its computation (at 16) of each speed measurement on the basis of each signal emitted by the Doppler transducer, and it computes the speed value while taking account of said correction data item so as to provide a corrected measurement of the speed of said fluid, thereby improving its accuracy.

L'invention concerne un procédé et un appareil permettant d'améliorer la précision avec laquelle la vitesse d'un fluide, tel qu'un liquide, en particulier du sang s'écoulant dans un conduit, tel qu'un vaisseau sanguin, notamment l'aorte, est mesurée à l'aide d'un signal émis par un émetteur-récepteur Doppler (4). L'émetteur-récepteur Doppler est associé, de manière caractéristique, à une mémoire programmable (50) qui contient au moins un article de donnée de correction destiné à corriger le signal Doppler transmis par l'émetteur-récepteur (4) à une commande d'émetteur-récepteur et à une unité informatique (8). Ladite unité informatique (8) incorpore l'article de donnée de correction de signal dans le calcul (16) de chaque mesure de vitesse en fonction de chaque signal émis par l'émetteur-récepteur Doppler, et calcule la valeur de la vitesse en prenant en compte l'article de donnée de correction, de façon à fournir une mesure corrigée de la vitesse du fluide, ce qui améliore la précision de ladite mesure.

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