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The Eustachian tube (/ j uː ˈ s t eɪ ʃ ən /), also called the auditory tube or pharyngotympanic tube, [1] is a tube that links the nasopharynx to the middle ear, of which it is also a part. In adult humans, the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. [ 2 ]
Anatomic obstruction within the proximal cartilaginous eustachian tube. [5] Dilatory Eustachian tube dysfunction: Functional, dynamic (muscle failure), or anatomical obstruction of the Eustachian tube; Baro-challenge induced Eustachian tube dysfunction: Eustachian tube dysfunction which generally features a normal otoscopy and normal tympanometry
Patulous Eustachian tube is a physical disorder. The exact causes may vary depending on the person and are often unknown. [5] Weight loss is a commonly cited cause of the disorder due to the nature of the Eustachian tube itself and is associated with approximately one-third of reported cases. [6]
Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors. [3] Blocking of the eustachian tube leads to decreased pressure in the middle ear relative to the external ear, and this causes decreased motion of both the ossicles and the tympanic membrane. [4] Acute or Serous otitis media
Depending on the type, the tube is either naturally extruded in 6 to 12 months or removed during a minor procedure. [ 1 ] Those requiring myringotomy usually have an obstructed or dysfunctional eustachian tube that is unable to perform drainage or ventilation in its usual fashion.
Behind the ostium of the eustachian tube (ostium pharyngeum tuba auditiva) is a deep recess, the pharyngeal recess (fossa of Rosenmüller). Clinical significance
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Cartilaginous part of auditory tube; Levator veli palatini muscle; ... Conductive deafness (due to Eustachian tube obstruction) Ipsilateral immobility of the soft palate;