Insufflation device with intelligent control of smoke evacuation

An insufflator for providing gas to a patient cavity during minimally invasive surgery, comprising:

• a) a gas connection adapted for receiving a gas supply and providing the gas supply to a pressure and flow rate regulating unit equipped with a flow rate measuring unit, a proportional valve and a pressure sensor;
• b) a supply line for receiving gas from the pressure and flow rate regulating unit, the supply line connected to a first trocar for providing pressurized gas to the patient cavity;
• c) a second trocar connected to an exhaust line which is operatively connected to an evacuation device for removing flue gas from the patient cavity;
• d) a device for determining of the evacuation volumetric flow rate;
• and
• e) a controller operatively connected to the pressure and flow rate regulating unit and the evacuation device;
• wherein the controller controls the evacuation device so as to adjust the evacuation volumetric flow rate based at least in part on a defined maximum exchange volumetric flow rate and a determined leakage volumetric flow rate.