Eustachian tube(redirected from Eustacian)
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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.)
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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."
Synonym(s): tuba auditiva [TA], auditory tube ☆ , tuba auditoria ☆ , eustachian tube, guttural duct, otopharyngeal tube, otosalpinx, tuba acustica, tuba eustachiana, tuba eustachii
Farlex Partner Medical Dictionary © Farlex 2012
Eustachian tube(yo͞o-stā′shən, -shē-ən, -kē-ən)
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Eustachian tubeA narrow canal that connects the anterior wall of the tympanic cavity with the lateral wall of the nasopharynx.
Equalisation of pressure differences between the middle ear and the external atmosphere; mucus drainage from the middle ear.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Eustachian tubeA 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).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
eustachian tubea 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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
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
Medical Eponyms © Farlex 2012