Pressure cell holder for an extracorporeal blood treatment machine

A pressure cell holder for attachment to a housing of an extracorporeal blood treatment machine, the pressure cell holder comprising:

• at least one wall portion that at least partially defines a receiving chamber for receiving a pressure cell along an insertion direction;
• a gripping device adapted to grip around a blood chamber port of the pressure cell that is received in the receiving chamber, and block the blood chamber port against movement in a direction opposite the insertion direction;
• an ejection mechanism;
• and
• a pressure transmission line,
• the ejection mechanism comprising a spring mechanism comprising a pressure element which is spring-mounted to be pre-tensioned upon insertion of the pressure cell and presses against the pressure cell in a holding state in which the pressure cell is held by the gripping device and is adapted to eject the pressure cell in the direction opposite the insertion direction actively upon release of the gripping device, and
• the pressure transmission line being configured to be fluidically connectable to a fluid chamber of the pressure cell and to transmit a fluid pressure present in the fluid chamber to a pressure sensor of the extracorporeal blood treatment machine.