Importance

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Abstract

The device according to the invention serves to set up a dilution measurement site on a hemodialyzer. Using such a measurement site, it is possible to determine the filling status of a dialysis patient during dialysis treatment, by means of dilution measurements. Checking the fluid balance by means of weighing the dialysis patient, which is subject to error, can be eliminated. The arterial connection piece is connected with an arterial fistula needle, and the venous connection piece is connected with a venous fistula needle as the blood vessel access. The venous connection piece has an injection channel through which a bolus required to perform a dilution measurement can be injected into the blood, which flows through the venous connection piece coming from the hemodialyzer, in the direction of the venous blood vessel access. The arterial connection piece has a temperature sensor by means of which the temperature of the blood, which flows through the venous connection piece coming from the arterial blood vessel access, in the direction of the hemodialyzer, can be measured. The system response to the disruption caused in the bloodstream of the dialysis patient by means of the bolus injection can be determined by way of this temperature measurement, and the bloodstream filling status can be determined from this.

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First Claim