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Symposium on prophylaxis and treatment of middle ear effusions.: Iv. Physiology of the eustachian tube in the pathogenesis and management of middle ear effusions

Eustachian tube function studies were carried out in patients with concurrent or recent middle ear effusions. Radiographic techniques were employed in assessing tubal response to liquid flow. Studies of air flow and air pressure were carried out using a Madsen bridge, and depended on the presence of either a perforation or a tympanostomy tube.