Tubal Catarrh
Background The mucosa-lined Eustachian tube (eustachian tube, tuba auditiva) is the connection between the nasopharynx and the tympanic cavity of the middle ear. Its main function is to equalize pressure between the middle ear and the external ambient pressure. The tube is normally closed and opens when swallowing or yawning. Two other important functions are … Tubal Catarrh
