System and apparatus for a non-invasive measurement of blood...

A - Human Necessities – 61 – B

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A61B 5/021 (2006.01)

Patent

CA 2739395

This invention concerns a system for estimating systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP). Said system establishes a physiological model of the pulse wave along with its energy to, subsequently, generate a fixed-length vector containing the values of the previous model along with other variables related to the user such as, for example, age, sex, height, weight, etc. This fixed-length vector is used as input in a function estimation system based on random forests to calculate the three variables of interest. The principal advantage of this system for estimating parameters derives from the fact that it does not impose any a priori restriction on the function to be estimated as well as being highly robust when handling heterogeneous data, as is the case with this invention.

L'invention concerne un système pour estimer la tension artérielle systolique (SBP), diastolique (DBP) et moyenne (MAP). Ledit système établit un modèle physiologique de l'onde d'impulsion avec son énergie pour, a posteriori, générer un vecteur de longitude fixe contenant les valeurs du modèle antérieur avec d'autres variables associées à l'utilisateur comme, par exemple, l'âge, le sexe, la taille, le poids, etc. Ce vecteur de longitude fixe est utilisé en tant qu'entrée d'un système d'estimation de fonctions fondé sur des arborescences aléatoires pour le calcul des trois variables d'intérêt. L'avantage principal de ce système d'estimation de paramètres réside dans le fait qu'il n'impose aucune restriction a priori sur la fonction à estimer et qu'il est hautement robuste face à des données hétérogènes, comme c'est le cas pour la présente invention.

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