Importance

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Abstract

A device designed for determining one or more medical variables in living organisms, comprises a part to be inserted into the tissue of the organism, which has an exchange channel with openings into the tissue. The device comprising a delivery unit connected with the exchange channel for the delivery of a perfusion fluid and its drainage after partial equilibration with the medical variable or quantity to be measured, i.e., preferably glucose concentration, and comparatively constant endogenous or exogenous marker variables. The device further comprising an analyzing unit for measuring the medical variable and one marker variable, and an evaluation unit for determining the actual concentration of the medical variable with the use of the marker variables. The proposal is put forward that the part to be inserted into the tissue is configured as a flexible plastic cannula, and that this cannula is provided with a puncturing needle on one end, and that the two ends of the cannula are connected to feeder and drainage tubes of the delivery unit both on the pressure and suction side.

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First Claim