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AssigneeFresenius Medical Care Deutschland GmbH
InventorsAndreas Maierhofer, Alfred Gagel, Malte Gross
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The present invention relates to a dialysis liquid circuit with conduits for conducting dialysis liquid and with means for detecting air in the dialysis liquid, wherein the means comprise at least one gas sensor traversed continuously by the dialysis liquid, which is configured such that it measures at least one property of the dialysis liquid which depends on the presence of air bubbles in the dialysis liquid, and which is arranged downstream of a region to be monitored of the dialysis liquid circuit, in which during operation of the dialysis liquid circuit a negative pressure exists with respect to atmospheric pressure, wherein the means comprise an evaluation unit which is connected with the gas sensor and which is configured such that the property measured by means of the gas sensor is evaluated with regard to the presence of air bubbles in the dialysis liquid.
A dialysis liquid circuit (10) with conduits for conducting dialysis liquid and with means for detecting air in the dialysis liquid, characterized in that the means comprise at least one gas sensor (20) traversed continuously by dialysis liquid, which is configured such that it measures at least one property of the dialysis liquid which depends on the presence of air bubbles in the dialysis liquid, and which is arranged downstream of a region (11) to be monitored of the dialysis liquid circuit (10) in which during operation of the dialysis liquid circuit (10) a negative pressure exists with respect to atmospheric pressure, wherein the means furthermore comprise an evaluation unit which is connected with the gas sensor (20) and is configured such that the property measured by means of the gas sensor (20) is evaluated with regard to the presence of air bubbles in the dialysis liquid.
A method for detecting air in a dialysis liquid flowing through a dialysis liquid circuit (10), in which downstream of a region (11) to be monitored of the dialysis liquid circuit (10), in which during operation of the dialysis liquid circuit (10) a negative pressure exists with respect to atmospheric pressure, a property of the dialysis liquid flowing through a measurement region is measured continuously, which depends on the presence of air bubbles in the dialysis liquid, and in which the property measured is evaluated with regard to the presence of air bubbles in the dialysis liquid.
Use of a gas sensor (20) in a dialysis liquid circuit (10), characterized in that the gas sensor (20) serves to detect air bubbles in a dialysis liquid flowing through the dialysis liquid circuit (10) and is configured such that it measures at least one property of the dialysis liquid which depends on the presence of air bubbles in the dialysis liquid, wherein the gas sensor (20) is arranged downstream of a region (11) to be monitored of the dialysis liquid circuit (10), in which during operation of the dialysis liquid circuit (10) a negative pressure exists with respect to atmospheric pressure, and is traversed continuously by the dialysis liquid.
Dependencies are inferred from the claim text.