Analysis unit for detecting a disconnection at a ventilator

A ventilator comprising a ventilator analysis unit for detecting a disconnection of a pneumatic connection between a ventilator and a patient to be ventilated by the ventilator, the ventilator analysis unit comprising:

• a data acquisition module configured to receive gas flow data indicating a gas flow present at a transition to the patient through the ventilator and to receive gas pressure data indicating a gas pressure present at the transition to the patient through the ventilator;
• a memory module configured to provide a current disconnection value function, which describes an association between the gas flow present at the transition and the gas pressure present at the transition to a disconnection value to be assigned;
• and
• a calculation module configured:
• to receive the gas flow data, the gas pressure data and the current disconnection value function and to calculate a current disconnection value based on the gas flow data and the gas pressure data via the current disconnection value function;
• to determine a disconnection number from a chronological sequence of correspondingly calculated current disconnection values;
• and
• to indicate a presence of a disconnection of the pneumatic connection via a corresponding output if the disconnection number reaches or exceeds a predefined threshold value over a predefined time period.

A process for detecting a disconnection of a pneumatic connection between a ventilator and a patient to be ventilated by the ventilator, the process comprising the steps of:

• receiving gas flow data and gas pressure data, wherein the gas flow data indicates a gas flow present at a transition to the patient through the ventilator and wherein the gas pressure data indicates a gas pressure present at the transition to the patient through the ventilator;
• providing a current disconnection value function, which describes an association between the gas flow present at the transition and the gas pressure present at the transition to a disconnection value to be assigned;
• calculating a current disconnection value based on the gas flow data and on the gas pressure data via the current disconnection value function;
• determining a disconnection number from a chronological sequence of correspondingly calculated, current disconnection values;
• and
• indicating a presence of a disconnection of the pneumatic connection if the disconnection number reaches or exceeds a predefined threshold value over a predefined time period.