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Endolymphatic hydrops is a disorder of the inner ear. It consists of an excessive build-up of the endolymph fluid, which fills the hearing and balance structures of the inner ear. Endolymph fluid, which is partly regulated by the endolymph sac, flows through the inner ear and is critical to the function of all sensory cells in the inner ear.
Cochlear hydrops preferentially affects the apex of the cochlea where low-frequency sounds are interpreted. Due to the fluid imbalance in this area, parts of the cochlea are stretched or under more tension than usual, which can lead to distortions of sound, changes in pitch perception, or hearing loss, all usually in the low frequencies.
IEDCS and inner ear barotrauma (IEBt) are the inner ear injuries associated with ambient pressure diving, both of which manifest as cochleovestibular symptoms. The similarity of symptoms makes differential diagnosis difficult, which can delay appropriate treatment or lead to inappropriate treatment.
You may hear a squeak or popping sound as the air pressure equalizes. Fluid in the Ear . The most common cause of fluid in the ear is an infection, but it can also be caused by other medical ...
Inner ear decompression sickness (IEDCS) can be confused with inner ear barotrauma (IEBt), alternobaric vertigo, caloric vertigo and reverse squeeze. A history of difficulty in equalising the ears during the dive makes ear barotrauma more likely, but does not always eliminate the possibility of inner ear DCS, which is usually associated with ...
This is caused by a rupture of the round window or oval window ligaments separating the inner and middle ear. [1] Another type of labyrinthine fistula is the superior semicircular canal dehiscence, which allows the inner ear to be influenced by the intracranial pressure directly.
Pressure on the outer side of the eardrum normally closely follows ambient pressure, and in the inner ear pressure equalises through the Eustachian tube, which must be open for gas to flow through. If the diver does not equalise sufficiently a pressure difference may develop that is large enough to damage the eardrum as described.
The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear. In vertebrates , the inner ear is mainly responsible for sound detection and balance. [ 1 ] In mammals , it consists of the bony labyrinth , a hollow cavity in the temporal bone of the skull with a system of passages comprising two main functional parts: [ 2 ]
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