Method for controlling a blood treatment apparatus, and apparatuses
AssigneeFresenius Medical Care Deutschland GmbH
InventorPascal Kopperschmidt
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Abstract
The present disclosure relates to a method for controlling a blood treatment apparatus when air bubbles or air pockets are present in an extracorporeal blood circuit connected to the blood treatment apparatus, which have been detected by an air bubble detector. It further relates to a control device or closed-loop control device and a blood treatment apparatus by which the method described herein is brought into effect, a digital storage medium, a computer program product, and a computer program.
Claims18
A method for controlling a blood treatment apparatus, which comprises a blood pump, an air bubble detector and a pump for conveying dialysis liquid and/or dialysate, during an extracorporeal blood treatment session, during which the blood treatment apparatus is connected to a blood filter having a semi-permeable membrane and to an extracorporeal blood circuit, the extracorporeal blood circuit being connected to a patient, wherein the method comprises:
- detecting air bubbles in the extracorporeal blood circuit with the air bubble detector;
- after the detection of air bubbles, stopping the blood pump or reducing the conveying rate of the blood pump, wherein the conveying rate is provided immediately before the detection of air bubbles;
- and
- generating a negative transmembrane pressure across the semi-permeable membrane by activating the pump for conveying dialysis liquid and/or dialysate while the blood pump is stopped or the conveying rate is reduced, thereby removing blood from the patient.
Dependencies are inferred from the claim text.