The present invention relates to a pressure equalization balloon, wherein the volume of the pressure equalization balloon is connected to a further volume, the pressure of which is intended to remain as constant as possible even in the event of a forced volume change. Therefore, in order to keep the cuff pressure in the pressure range that is generally considered appropriate and optimal of between roughly 20 mbar and 30 mbar, the equalization balloon is produced according to the invention from a thermoplastic polymer (TPE) and is overstretched past the maximum intended control volume before first use and is then relaxed to the range of the control volume. Therefore the modulus of elasticity of the TPE is changed in such a manner that the pressure prevailing in the equalization balloon remains constant at least within a predetermined control volume range of the equalization balloon, in that the volume of the equalization balloon increases when the pressure rises above a target control value and decreases when the pressure falls below the target control value.
