Abstract
Passive and active ventilatory functions of the tube were examined in 14 patients with patulous Eustachian tube syndrome by the inflation deflation test and the forced response test (FRT). The reported hyperpatency of the tube was confirmed by low opening pressure in the inflation test and low static tubal resistance in the FRT.Both hypofunction of active ventilation in the deflation test and incomplete decrease in tubal resistance during swallowing indicated that active tubal function was impaired in this syndrome to the same extent as in other middle ear diseases.A relatively fixed tubal resistance at three different air flow rates in the FRT suggested that the Eustachian tube in patients with this syndrome may not always be as compliant or floppy as reported before.
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