Eustachian tube

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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

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
References in periodicals archive ?
They need help to coax open their eustachian tubes, the body's typical way of clearing that stuffy, clogged sensation.
Prior to this current approval, the Acclarent AERA Eustachian Tube Balloon Dilation System device was cleared only for adults aged 22 and older.
Past studies have shown a role for the protective and pressure-regulating functions of the Eustachian tube in preserving middle ear health (10).
It was reported that children with deep dental overbites were at a significantly increased risk for developing eustachian tube dysfunction [McDonnell et al., 2001; Azadani et al., 2007].
Because my eustachian tube on my right side had not been opening and closing as it should, there was a negative pressure in my middle ear and this negative pressure over time had caused my right eardrum to be sucked inward creating "retraction pockets." The pockets were ripe with bacteria that caused many infections.
Fluid or pathogenic organisms from the throat enter the eustachian tubes and travel to the middle ear space.
Swollen and inflamed eustachian tubes often get clogged with fluid and mucus from a cold.
When an illness develops in which mucus is produced in large amounts, there is potential for it to block the eustachian tubes, which can lead to ear infection.
When you're in an airplane, air sometimes doesn't enter your eustachian tubes quickly enough.
The germs that are making your nose and throat sore and swollen can cause your eustachian tubes to become swollen, too.
The baby needs to be swallowing to open up the eustachian tubes to help equalize the pressure in [the] middle ears."
Another cause of blocked Eustachian tubes is infection of the middle ear which creates swollen membranes.