Methods of testing the function of the Eustachian tube

Abstract

We present herein outlines of tubotympanoaerody-namography (TTAG), sonotubometry and the infla tion-deflation test, which are the main approaches used to test Eustachian tube function. The Eustachian tube connects the middle ear to the nasopharynx, and is recognized as an organ which ventilates, drains and protects the middle ear. Eustachian tube dysfunction leads to various diseases of the middle ear and the Eustachian tube itself. The evaluation of Eustachian tube function is useful for assessment of the pathological condition and in reaching a decision about indication for surgical treatment. We should therefore grasp the principle of each test and interpretation of the results.