Dialysis machine and method of operating a dialysis machine

A dialysis machine that is configured to be equipped with an extracorporeal blood system comprising a dialysis solution system that is configured to be equipped with a dialyzer, wherein a mixing region, in particular a mixing chamber, is provided in which the fresh dialysis solution or a component thereof is located in the operation of the dialysis machine, with at least one concentrate line being in fluid communication with the mixing region, through which concentrate line concentrate can be conducted from a concentrate container into the mixing region,

• characterized in that
• one or more electrically conductive elements are arranged spaced apart from one another in or at the at least one concentrate line;
• that a measuring device is provided which is electrically connected to the conductive elements and which is configured to measure the conductance or a value correlated therewith between them;
• and that a control unit is provided which is configured to compare the measured value with a desired value, with a limit value, or with a desired value range, wherein
• the control unit is configured to initiate a special operating mode of the dialysis machine when the measured value does not agree with the desired value, exceeds or falls below a limit value, or is not in a desired value range, wherein
• the special operating mode comprises a special air separation differing from normal operation and/or the flushing of the dialysis solution system or a part thereof, wherein
• the flushing of the dialysis solution system or a part thereof only takes place after the special air separation.