Normal Tubal Function

Abstract

JUST AS DIVING and flying directed at tention to tubal function under these special conditions where the middle ear is exposed to large and rapid pressure changes, so aeration of the tympanic cavity in reconstructive ear surgery has directed attention to tubal function under normal barometric conditions. The behavior of the tube in transmitting large and rapid movements of air to and from the middle ear is now fairly well documented. On the other hand, despite a great deal of study, the development and maintenance of gas-filled spaces in the middle ear and mastoid under normal conditions are not clearly understood. While there is general agreement about the gross and microscopic anatomy of the structures involved, the normal physiological role of the component parts is more difficult to determine. The behavior of the tube and middle ear under normal barometric conditions needs further study. Some of the questions that one