Method and apparatus for control of non-invasive parameter...

A - Human Necessities – 61 – B

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A61B 5/02 (2006.01)

Patent

CA 2494548

Improved methods and apparatus for non-invasively assessing one or more parameters associated with fluidic systems such as the circulatory system of a living organism. In a first aspect, an improved method of continuously measuring pressure from a compressible vessel is disclosed, wherein a substantially optimal level of compression for the vessel is achieved and maintained using perturbations (e.g., modulation) of the compression level of the vessel. In one exemplary embodiment, the modulation is conducted according to a pseudo-random binary sequence (PBRS). In a second aspect, an improved apparatus for determining the blood pressure of a living subject is disclosed, the apparatus generally comprising a pressure sensor and associated processor with a computer program defining a plurality of operating states relates to the sensed pressure data. Methods for pressure waveform correction and reacquisition, as well as treatment using the present invention, are also disclosed.

L'invention concerne des procédés et un appareil destinés à évaluer de façon non invasive un ou plusieurs paramètres associés à des systèmes fluidiques tels qu'un système circulatoire d'un organisme vivant. Dans un premier aspect, l'invention concerne un procédé amélioré de mesure de pression en continu d'un récipient compressible, dans lequel un niveau sensiblement optimal de compression est réalisé et maintenu au moyen de perturbations (par exemple, par modulation) du niveau de compression du récipient. Dans un mode de réalisation exemplaire, la modulation est réalisée en fonction d'une séquence binaire pseudo-aléatoire (PBRS). Dans un second aspect, l'invention concerne un appareil amélioré destiné à déterminer la pression sanguine d'un sujet vivant, cet appareil comprenant généralement un capteur de pression et un processeur associé à un programme informatique définissant plusieurs états de fonctionnement liés aux données de pression captées. L'invention concerne également des procédés destinés à réacquérir et à corriger la forme d'onde de pression, ainsi qu'un traitement utilisant cette invention.

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