Venous pulse oximetry

Details Venous pulse oximetry Venous pulse oximetry

A - Human Necessities

61

B

A61B 5/00 (2006.01)

Patent

CA 2474123

A method of non-invasively measuring venous oxygen saturation, comprising: applying a pressure transducer at a first site on a body, applying a drive signal to the external pressure transducer at a predetermined frequency, to cause a series of pulsations of a predetermined magnitude in the venous blood volume in the vicinity of said first site, applying an oximeter device at a second site on the body, measuring output signals received from said oximeter device, said output signals containing a component representative of the modulation of venous blood volume due to said pulsations, deriving a measure of venous oxygen saturation from the frequency response of said output signals.

L'invention concerne un procédé pour mesurer, de manière non invasive, la saturation veineuse en oxygène, ledit procédé consistant à : placer un transducteur de pression sur un premier site d'un corps ; appliquer un signal de commande au transducteur de pression externe à une fréquence prédéterminée, de façon à provoquer une série de pulsations d'une amplitude prédéterminée dans le volume de sang veineux à proximité dudit premier site ; placer un oxymètre sur un deuxième site du corps ; mesurer les signaux de sortie émis par ledit oxymètre, lesdits signaux de sortie contenant une composante représentative de la modulation du volume de sang veineux due auxdites pulsations ; dériver une mesure de la saturation veineuse en oxygène à partir de la réponse en fréquence desdits signaux de sortie.

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