A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 1/365 (2006.01) A61B 5/05 (2006.01)
Patent
CA 2375646
The invention relates to a method for determining properties of blood, such as the blood viscosity of a person, comprising of generating in vivo for a determined time, by means of an electrical alternating current of a determined frequency, a measurement signal of the impedance of the blood between at least two points centrally in a blood volume, wherein the measurement signal is processed such that variations therein with a frequency in the order of magnitude of the heart frequency are substantially absent therefrom, and comparing the processed measurement signal with predetermined relations between impedance and the properties of the blood, such as the viscosity.
L'invention concerne un procédé pour déterminer des propriétés du sang, telles que la viscosité du sang d'une personne, qui comprend la production in vivo pour un temps déterminé, en utilisant un courant électrique alternatif, d'une fréquence déterminée, d'un signal de mesure de l'impédance du sang entre, au moins deux points centraux dans un volume de sang. Le signal de mesure dans ce volume de sang est traité de manière à ce que les variations dans ledit volume avec une fréquence dans l'ordre de magnitude de la fréquence du coeur en soient quasiment absentes. Le signal de mesure traité est comparé avec des relations préétablies entre l'impédance et les propriétés du sang, telles que la viscosité.
Fetherstonhaugh & Co.
Martil Instruments B.v.
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