Insufflator with Filter Loading Detection Device

Insufflator for minimally invasive surgery, comprising

• a) gas connection with proportional valve,
• b) one first trocar,
• c) one gas supply line for gas from the gas connection with pressure measurement, filter and connection to the first trocar,
• d) one evacuation device with adjustable evacuation capacity,
• e) one second trocar with evacuation hose connected to the evacuation device with adjustable evacuation capacity,
• f) one filter for cleaning the evacuated gas, which filter is positioned between the second trocar and the evacuation device,
• h) at least one pressure sensor positioned upstream or downstream of the filter in the direction of the gas flow,
• i) optionally at least one gas flow sensor, which gas sensor is positioned upstream or downstream of the filter in the direction of the gas flow, or at least two gas flow sensor of which at least one is positioned upstream and one downstream of the filter,
• j) one electronic control unit,
• k) one display device.
• wherein the electronic control unit determines the evacuation device on the basis of the measured values of the pressure sensors and/or the gas flow sensors, the status of the loading of the filter, and the expected remaining runtime and wherein the display device displays the remaining runtime.
• and wherein an alarm is triggered by the electronic control unit when the linear increase of the pressure difference turns into an exponential increase or when the linearly decreasing gas flow turns into an exponentially decreasing gas flow.