BAKGROUND The middle ear (tympanic cavity and mastoid process) is a closed cavity. It is filled with a special gas mixture and at the same pressure as atmospheric air, the composition of the gas is similar to the surrounding tissues. Its change in pressure is compensated by the occasional opening of the Eustachian tube. If the tube does not open, a persistently high negative pressure develops in the middle ear, the clinical consequences of which are well known. The negative pressure is eliminated by a tympanostomy tube implanted in the tympanic membrane. Inserting the tube instead of one abnormal condition (permanently closed middle ear) creates another abnormal condition (permanently open middle ear). Prolonged insertion of the tube may cause irreversible damage. / eardrum atrophy, tympanosclerosis, permanent perforation, auditory bone damage, cholesteatoma /. AIM We are looking for a solution that is similar to the original, i.e. the middle ear should be closed and open from time to time. METHOD We studied middle ear ventilation based on literature data, our own research, and our computer model. RESULTS We concluded that the original function can be restored with the valve tube. In our case, the opening and closing of the valve is controlled by a change in volume caused /diethyl ether/ by a change in body temperature. CONCLUSION A more advanced solution would be a nanotechnology valve controlled by a change in total pressure, a partial pressure change in oxygen or carbon dioxide. However, a valve that can be opened at different intervals or even individually adjusted is conceivable.