Abstract: The present invention relates to an endo-tracheal or tracheotomic tube for anaesthesia, comprising a tubular body for conveying the ventilation and anaesthesia gases and provided in the vicinity of its distal end with an inflatable balloon ensuring tightness, a flexible thermal shield being disposed between said balloon and the proximal end of the tube, at some distance from said balloon. According to the invention, this tube comprises an auxiliary conduit opening on the side of said shield opposite the balloon adapted to have an inert gas passing therethrough. The invention is particularly applicable to the treatment of the upper respiratory tracts by laser.