Dialysis machine, method of controlling the dialysis machine, and computer program for implementing the control

A dialysis machine comprising:

• a fluid circuit for providing a dialysis fluid to a dialyser;
• a first valve enabling a disinfectant fluid to be provided to at least a part of the fluid circuit during disinfection of the dialysis machine, the first valve including a disinfectant fluid port and a fluid circuit port;
• and
• a pump configured to pump the dialysis fluid through the fluid circuit to the dialyser during treatment, thereby creating a positive pressure gradient between the disinfectant fluid port and the fluid circuit port of the first valve,
• wherein the first valve is arranged to enable the disinfectant fluid to be provided upstream of the dialyser at a position in the fluid circuit where the pump creates the positive pressure gradient during treatment, the positive pressure gradient enabling the disinfectant fluid port of the first valve to be safely connected to a source of disinfectant fluid to ensure that said disinfectant fluid does not leak into the fluid circuit during treatment.