Measuring tissue oxygenation

A - Human Necessities – 61 – B

Patent

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A61B 5/1455 (2006.01)

Patent

CA 2688050

Methods and systems for calculating tissue oxygenation, e.g., oxygen saturation, in a target tissue are disclosed. In some embodiments, the methods include: (a) directing incident radiation to a target tissue and determining reflectance spectra of the target tissue by measuring intensities of reflected radiation from the target tissue at a plurality of radiation wavelengths; (b) correcting the measured intensities of the reflectance spectra to reduce contributions thereto from skin and fat layers through which the incident radiation propagates; (c) determining oxygen saturation in the target tissue based on the corrected reflectance spectra; and (d) outputting the determined value of oxygen saturation.

La présente invention concerne des procédés et des systèmes de calcul de l'oxygénation de tissus, par exemple de la saturation en oxygène, d'un tissu cible. Dans certains modes de réalisation, les procédés incluent les étapes suivantes : (a) diriger le rayonnement incident sur un tissu cible et déterminer les spectres de réflectance du tissu cible en mesurant les intensités du rayonnement réfléchi par le tissu cible à une pluralité de longueurs d'onde de rayonnement; (b) corriger les intensités mesurées des spectres de réflectance pour réduire les contributions à ces spectres dues aux couches de peau et de graisse à travers lesquelles le rayonnement incident se propage; (c) déterminer la saturation en oxygène du tissu cible en se fondant sur les spectres de réflectance corrigés; et (d) sortir la valeur déterminée de la saturation en oxygène.

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