Method and apparatus for non-invasively measuring...

A - Human Necessities – 61 – B

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A61B 5/02 (2006.01) A61B 5/021 (2006.01)

Patent

CA 2474784

An improved method and apparatus for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises a method of measuring a hemodynamic parameter (e.g., arterial blood pressure) by applanating or compressing portions of tissue proximate to the blood vessel of concern until a desired condition is achieved, and then measuring the hemodynamic parameter. Such applanation effectively mitigates transfer and other losses created by the tissue proximate to the blood vessel, thereby facilitating accurate and robust tonometric measurement. An algorithm adapted to maintain optimal levels of applanation is also described. Methods and apparatus for scaling such hemodynamic parameter measurements based on subject physiology, and providing treatment to the subject based on the measured parameters, are also disclosed.

L'invention concerne un procédé et appareil améliorés permettant d'évaluer de façon non invasive un ou plusieurs paramètres hémodynamiques associés au système circulatoire d'un organisme vivant. Dans un premier aspect, cette invention concerne un procédé de mesure d'un paramètre hémodynamique (p. ex., une pression artérielle) consistant à aplanir ou comprimer des parties de tissu situées à proximité du vaisseau sanguin concerné jusqu'à ce qu'un état souhaité soit atteint puis à mesurer ce paramètre hémodynamique. Cette aplanation mitige, de façon efficace, un transfert et d'autres pertes créées par le tissu proche du vaisseau sanguin, ce qui facilite l'obtention d'une mesure tonométrique précise et robuste. La présente invention concerne également un algorithme adapté pour maintenir des niveaux d'aplanation optimaux ainsi que des procédés et un appareil permettant de mettre à l'échelle ces mesures de paramètres hémodynamiques en fonction de la physiologie du sujet et de traiter ce sujet sur la base des paramètres mesurés.

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