The endotracheal tubes with balloons (cuffed) which are attached to the tracheas of the patients who receive mechanical respiratory support deform the circulation through applying pressure on the trachea walls and cause numerous complications. In the endotracheal tube analyzed in the invention the valve system in the form of cataract (4 5) is used instead of balloons the pressure on the trachea wall during each expiration is decreased and the disorder of getting blood occurring in the mucosa of the trachea was prevented. Moreover the leaking of the liquid contents coming from in mouth and stomach into the lungs and the formation of bacteria and the risk of infection was decreased through ventilating the trachea in a more physiological manner.
