eustachian tube


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

eustachian tube

 [u-sta´ke-an]
the narrow channel that connects the middle ear with the nasopharynx; it serves to equalize pressure on either side of the tympanic membrane (eardrum). In children this tube is wider and shorter than in adults, and thus children are especially prone to otitis media, infection of the middle ear that originates in the pharynx and travels through the tube. Called also auditory tube. (See also Plates.)

pha·ryn·go·tym·pan·ic (auditory) tube

[TA]
a tube leading from the tympanic cavity to the nasopharynx; it consists of an osseous (posterolateral) portion at the tympanic end, and a fibrocartilaginous (anteromedial) portion at the pharyngeal end; where the two portions join, in the region of the sphenopetrosal fissure, is the narrowest portion of the tube (isthmus); the auditory tube enables equalization of pressure within the tympanic cavity with ambient air pressure, referred to commonly as "popping of the ears."

eustachian tube

or

Eustachian tube

(yo͞o-stā′shən, -shē-ən, -kē-ən)
n. Anatomy
A slender tube that connects the tympanic cavity with the nasal part of the pharynx and serves to equalize air pressure on either side of the eardrum.

eustachian tube

[yo̅o̅stā′shən]
Etymology: Bartolomeo Eustachio, Italian anatomist, 1524-1574; L, tubus
a tube lined with mucous membrane that joins the nasopharynx and the middle ear cavity. It is normally closed but opens during yawning, chewing, and swallowing to allow equalization of the air pressure in the middle ear with atmospheric pressure.

Eustachian tube

A narrow canal that connects the anterior wall of the tympanic cavity with the lateral wall of the nasopharynx.

Functions
Equalisation of pressure differences between the middle ear and the external atmosphere; mucus drainage from the middle ear.

Eustachian tube

A short passage leading backwards from the back of the nose, just above the soft palate, on either side, to the cavity of the middle ear. This allows air to pass to or from the middle ear cavity to balance the pressure on either side of the eardrum. (Bartolomeo Eustachi, Italian anatomist, b. around 1520 d. 1574).

eustachian tube

a tube passing from the pharynx to the middle ear in higher vertebrates, serving to equalize the pressure on either side of the TYMPANIC MEMBRANE. It opens during swallowing.

Eustachian tube

A tube of cartilage that connects the middle ear to the back of the throat. Its purpose is to equalize the pressure on either side of the eardrum.

Eustachio,

Bartolommeo E., Italian anatomist, 1524-1574.
eustachian catheter - a catheter used for catheterization of the middle ear through the eustachian tube.
eustachian cushion - a ridge in the nasopharyngeal wall posterior to the opening of the eustachian tube. Synonym(s): torus tubarius
eustachian tonsil - a collection of lymphoid nodules near the pharyngeal opening of the auditory tube. Synonym(s): tubal tonsil
eustachian tube - a tube leading from the tympanic cavity to the nasopharynx. Synonym(s): auditory tube; tuba eustachiana; tuba eustachii
eustachian tuber - a slight projection from the labyrinthine wall of the middle ear below the fenestra vestibuli (ovalis).
eustachian valve - an endocardial fold extending from the anterior inferior margin of the inferior vena cava to the anterior part of the limbus fossa ovalis. Synonym(s): valve of inferior vena cava
tuba eustachiana - Synonym(s): eustachian tube
tuba eustachii - Synonym(s): eustachian tube

Eustachian tube

a canal connecting the pharynx with the cavity of the middle ear, opened by the act of swallowing, which allows equalization of the air pressure on the two sides of the eardrum. Syn pharyngotympanic tube . First described by Eustachi, 16th-century Italian physician/anatomist. See also ear (fig) .

eustachian tube

(ūstā´shən),
n a tube, lined with mucous membrane, that joins the nasopharynx and the middle ear cavity, allowing equalization of the air pressure in the middle ear with atmospheric pressure. Also called the
auditory tube.

eustachian tube

References in periodicals archive ?
The ACCLARENT AERA(TM) offers a minimally-invasive and promising option for patients suffering from Eustachian Tube Dysfunction," said Dr.
Air travel has also been identified as a potential cause as the unequal pressure that develops on either side of the eardrum when a plane descends can block the eustachian tube.
It was reported that children with deep dental overbites were at a significantly increased risk for developing eustachian tube dysfunction [McDonnell et al.
Enlarged adenoids or tonsils can block the opening of the Eustachian tube at the nasopharynx.
The VT has another very beneficial function in that it serves as a portal for topical delivery of medications to the middle-ear space, and subsequently via the eustachian tube to the nasopharynx.
Poe who was conducting studies on the newest methods of eustachian tube surgery, for a "second opinion" in case Dr.
One typist turned the ear problem Eustachian tube malfunction into 'Euston station tube malfunction'.
When your ears start to hurt as you change altitudes, either during takeoff or landing, they are sending a signal that the eustachian tube - the canal that leads from the middle ear to the back of the throat behind the nose - has failed to help equalize the pressure quickly enough, a common problem when a flier is congested or experiencing inflammation from even mild allergies or a cold.
By letting air in and out of the middle ear, the eustachian tube keeps air pressure inside the ear the same as outside.
TEMPORARY deafness following colds is not uncommon, particularly in children and is caused by the narrow eustachian tube that connects the middle part of the ear to the back of the nose becomes blocked, by a mixture of catarrh and swelling.
The germ causing the illness travels up your child's eustachian tube to his or her middle ear, making this part of the ear infected and painful.
eustachian--The eustachian tube connects your ear to the back of your throat.