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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 (or cochlear Meniere's or cochlear endolymphatic hydrops) is a condition of the inner ear involving a pathological increase of fluid affecting the cochlea. This results in swelling that can lead to hearing loss or changes in hearing perception. It is a form of endolymphatic hydrops and related to Ménière's disease. Cochlear ...
Although historically it has been the least studied, renewed interest has surfaced due to changes in the SP reported in cases of endolymphatic hydrops or Ménière's disease. The auditory nerve action potential, also called the compound action potential (CAP), is the most widely studied component in ECochG.
Perilymph and endolymph have unique ionic compositions suited to their functions in regulating electrochemical impulses of hair cells. The electric potential of endolymph is ~80-90 mV more positive than perilymph due to a higher concentration of K compared to Na. [3]
More than 85% of patients with Ménière's disease get better from changes in lifestyle, medical treatment, or minimally invasive surgical procedures. Those procedures include intratympanic steroid therapy, intratympanic gentamicin therapy or endolymphatic sac surgery. [18]
A 40-watt CO 2 laser used in otorhinolaryngology Royal National Throat, Nose and Ear Hospital founded in 1874, in London. Otorhinolaryngology (/ oʊ t oʊ ˌ r aɪ n oʊ ˌ l ær ɪ n ˈ ɡ ɒ l ə dʒ i / oh-toh-RY-noh-LARR-in-GOL-ə-jee, abbreviated ORL and also known as otolaryngology, otolaryngology – head and neck surgery (ORL–H&N or OHNS), or ear, nose, and throat (ENT) ) is a ...
This is a very rare tumor, since only about 1 in 35,000 to 40,000 people have VHL, of whom about 10% have endolymphatic sac tumors. Patients usually present in the 4th to 5th decades without an gender predilection. The tumor involves the endolymphatic sac, a portion of the intraosseous inner ear of the posterior petrous bone. [1] [5]
A procedure called a third ventriculostomy is an option in some people. [1] Outcomes are variable, but many people with shunts live normal lives. [1] Without treatment, permanent disability or death may occur. [1] About one to two per 1,000 newborns have hydrocephalus. [1] [3] Rates in the developing world may be higher. [4]