Endolymphatic hydrops

Clinic

• It 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.
• In addition to water, endolymph fluid contains salts such as sodium, potassium, chloride and other electrolytes.
• If the inner ear is damaged by disease or injury, the volume and composition of the endolymph fluid can change, causing the symptoms of endolymphatic hydrops.

Symptoms

• Feeling of pressure or fullness in the ears
• Hearing loss
• Tinnitus
• Balance problems

Causes

• Trauma
• Infection
• Degeneration of the inner ear Allergies
• Dehydration
• Endolymphatic sac tumor
• Idiopathic

Endolymphatic hydrop vs Ménière's disease

• Ménière's disease have a degree of endolymphatic hydrops that is strong enough to trigger the symptoms of this disease, but individuals with endolymphatic hydrops do not always progress to Ménière’s disease.

• Ménière’s attacks occur when there is an increase in endolymphatic volume in the inner ear, causing a temporary leak in the membrane separating the perilymph (potassium poor fluid) and the endolymph (potassium rich fluid). The mix of these two fluids surrounding the vestibular sensory cells can lead to a temporary electrical blockade and loss of sensory function.
• The sudden change in the rate of the vestibular nerve firing results in a disturbance of signal processing in the corresponding brain regions, and thus to acute sensations of imbalance, otherwise known as vertigo.