A device and use thereof for supply of gas to an operational space configured to adjoin a temporarily open inner portion of a mammal during surgical operations. The device includes a supply conduit, connectable to the gas source including an outlet end, and a body having at least partly an annular shape extending along a circumferential path around centre axis enclosing the operational space. The body has an inner side, outer side, an open interior channel, and an opening allowing the gas to enter the body from the supply conduit. The body is manufactured in foam rubber-like material having large number of open cells functioning as supply nozzles permitting the supply of a substantially laminar, continuous gas stream into the operational space enabling the formation of a gas cushion in the operational space.
