Extracorporeal blood treatment machine comprising a poka-yoke for a pressure sensor

A system for extracorporeal blood treatment comprising:

• an extracorporeal blood treatment machine;
• and
• a tube set that is detachably mountable on the extracorporeal blood treatment machine in a predefined arrangement;
• the extracorporeal blood treatment machine comprising:
• a blood treatment device, a conveying device for conveying blood through the blood treatment device, and a connection mask on which at least two pressure sensor connections are located;
• the at least two pressure sensor connections including a first pressure sensor connection and a second pressure sensor connection;
• the tube set comprising a blood supply line for supplying blood to the blood treatment device, a blood return line for returning treated blood from the blood treatment device, a pump section adapted and provided to be inserted into the conveying device, and at least two pressure-monitoring lines,
• the at least two pressure-monitoring lines including a first pressure-monitoring line and a second pressure-monitoring line,
• the first pressure-monitoring line branching off of the tube set at a first branch, and the second pressure-monitoring line branching off of the tube set at a second branch,
• the first pressure-monitoring line having a first length and being connectable to the first pressure sensor connection to transmit pressure from the first pressure-monitoring line to the first pressure sensor connection,
• the second pressure-monitoring line having a second length and being connectable to the second pressure sensor connection to transmit pressure from the second pressure-monitoring line to the second pressure sensor connection,
• the first and second pressure sensor connections being positioned on the extracorporeal blood treatment machine in a spaced arrangement,
• the first length of the first pressure-monitoring line and the spaced arrangement of the first and second pressure sensor connections being configured so that the first pressure-monitoring line is attachable only to the first pressure sensor connection when the tube set is mounted to the extracorporeal blood treatment machine in the predefined arrangement, and
• the second length of the second pressure-monitoring line and the spaced arrangement of the first and second pressure sensor connections being configured so that the second pressure-monitoring line is attachable only to the second pressure sensor connection when the tube set is mounted to the extracorporeal blood treatment machine in the predefined arrangement;
• and
• wherein the first branch is attached at a first connection point to a first tube section of the tube set, and extends from the first connection point away from the first tube section at a predetermined angle relative to the first tube section so that, when the tube set is mounted in the predefined arrangement on the connection mask, the first branch is oriented to extend from the first connection point toward the first pressure sensor connection.