Method for modulating light penetration depth in tissue and...

A - Human Necessities – 61 – B

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A61B 5/00 (2006.01)

Patent

CA 2387789

Devices and methods for non-invasively measuring at least one parameter of a sample, such as the presence of a disease condition, progression of a disease state, presence of an analyte, or concentration of an analyte, in a biological sample, such as, for example, a body part. In these devices and methods, temperature is controlled and is varied between preset boundaries. The methods and devices measure light that is reflected, scattered, absorbed, or emitted by the sample from an average sampling depth, dav, that is confined within a region in the sample wherein temperature is controlled. According to the method of this invention, the sampling depth dav, in human tissue is modified by changing the temperature of the tissue.

L'invention concerne des dispositifs et des procédés destinés à la mesure non invasive d'au moins un paramètre d'un échantillon, tel que la présence d'un état pathologique, la progression d'un état pathologique, la présence d'un analyte, ou la concentration d'un analyte, dans un échantillon biologique, tel que, par exemple, une partie du corps. Ces dispositifs et ces procédés permettent de réguler et de faire varier la température entre des limites établies. Ils permettent également de mesurer la quantité de lumière réfléchie, diffusée, absorbée, ou émise par l'échantillon depuis une profondeur moyenne d'échantillon, d¿av?, située dans une zone de l'échantillon dont la température est régulée. Selon le procédé de cette invention, on peut modifier la profondeur de l'échantillon d¿av? du tissu humain en changeant la température du tissu.

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