ETD is a condition where the eustachian tube is not able to equalize pressure between the middle ear and the environment. Adult ETD accounts for over 2 million healthcare visits annually.
The condition may be short lived and can occur with upper respiratory tract infections. However, in many patients, ETD does not resolve quickly and patients may suffer from chronic ear infections and other long term disorders of the ear.
Symptoms include muffled hearing, ringing, pain and hearing loss.