Method for checking a connection state between a blood treatment apparatus and a blood tubing set, and apparatuses

A method for checking a connection between a compressed air outlet of a blood treatment apparatus and a pressure measuring line of an extracorporeal blood tubing set, the method comprising,

• providing the blood treatment apparatus comprising:
• a compressed air line;
• a compressed air device in fluid communication with the compressed air line;
• the compressed air outlet in fluid communication with both the compressed air line and an exterior of the blood treatment apparatus, wherein the compressed air outlet is connectable with a pressure measuring line;
• and a pressure sensor arranged to measure a pressure prevailing at the compressed air outlet or in the compressed air line;
• building up, using the compressed air device, a pressure and an air flow in the compressed air line, or at the compressed air outlet, or both;
• measuring a pressure or a change of the pressure over time prevailing at the compressed air outlet or in the compressed air line using a pressure sensor;
• and
• evaluating an increase of the measured pressure or of the measured change of the pressure over time, by comparing the measured pressure or the measured change of the pressure over time with previously measured or stored values, thresholds, ranges, or courses.

A detection device configured for performing or prompting a method for checking a connection between a compressed air outlet of a blood treatment apparatus and a pressure measuring line of an extracorporeal blood tubing set, the method comprising:

• providing the blood treatment apparatus comprising:
• a compressed air line;
• a compressed air device in fluid communication with the compressed air line;
• the compressed air outlet in fluid communication with both the compressed air line and an exterior of the blood treatment apparatus, wherein the compressed air outlet is connectable with a pressure measuring line;
• and
• a pressure sensor arranged to measure a pressure prevailing at the compressed air outlet or in the compressed air line;
• building up, using the compressed air device, a pressure and an air flow in the compressed air line, or at the compressed air outlet, or both;
• measuring a pressure or a change of the pressure over time prevailing at the compressed air outlet or in the compressed air line using a pressure sensor;
• and
• evaluating an increase of the measured pressure or of the measured change of the pressure over time, by comparing the measured pressure or the measured change of the pressure over time with previously measured or stored values, thresholds, ranges, or courses.

A blood treatment apparatus that is at least one of:

• (i) in signal communication with at least one detection device, (ii) connected to at least one detection device for signal communication, and (iii) comprising at least one detection device the at least one detection device configured for performing or prompting a method for checking a connection between a compressed air outlet of a blood treatment apparatus and a pressure measuring line of an extracorporeal blood tubing set, the method comprising:
• providing the blood treatment apparatus comprising:
• a compressed air line;
• a compressed air device in fluid communication with the compressed air line;
• the compressed air outlet being in fluid communication with both the compressed air line and an exterior of the blood treatment apparatus, wherein the compressed air outlet is connectable with a pressure measuring line;
• and
• a pressure sensor arranged to measure a pressure prevailing at the compressed air outlet or in the compressed air line;
• building up, using the compressed air device, a pressure and an air flow in the compressed air line, or at the compressed air outlet, or both;
• measuring a pressure or a change of the pressure over time prevailing at the compressed air outlet or in the compressed air line using a pressure sensor;
• and
• evaluating an increase of the measured pressure or of the measured change of the pressure over time, by comparing the measured pressure or the measured change of the pressure over time with previously measured or stored values, thresholds, ranges, or courses

A digital storage medium with electrically readable control signals that when executed by a hardware processor of a blood treatment apparatus cause the blood treatment apparatus to carry out operations comprising:

• building up, using a compressed air device of the blood treatment apparatus, a pressure and an air flow in a compressed air line of the blood treatment apparatus, or at a compressed air outlet of the blood treatment apparatus, or both;
• measuring a pressure or a pressure over time prevailing at the compressed air outlet or in the compressed air line using a pressure sensor;
• and
• evaluating an increase of the measured pressure or of the measured pressure over time, by comparing the measured pressure or the measured change of the pressure over time with previously measured or stored values, thresholds, ranges, or course.