What are the causes of sensorineural hearing loss?

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People with sensorineural hearing loss are often accompanied by poor speech understanding. They often feel that other people's speech is unclear, and they often raise their own volume when speaking, because they cannot hear their own voice through bone conduction. Only by raising the volume can they feel their own voice. The voice is normal, but people with conductive hearing loss can hear their own voices through bone conduction. Even in a noisy environment, they will not speak louder because the background noise is not loud to them.


What is the cause of sensorineural hearing loss?

Sensorineural deafness refers to hearing loss caused by the impact on the inner ear and its auditory nerve. An important part of the inner ear: cochlear disease is the main location. This kind of deafness cannot convert sound waves into nerve signals, or the nerves and their central pathways are blocked and cannot transmit nerve signals to the brain.


There are many causes of sensorineural deafness, and sometimes the cause may not be found.

(1) Acute infectious viral and bacterial infections, such as mumps, measles, scarlet fever, influenza, encephalitis, meningitis, typhoid, etc., can cause influenza Tone deafness. The damage to the cochlea caused by various diseases is basically similar, with the cochlear base being the most severe, with degeneration of the spiral organ, atrophy of the stria vascularis, dislocation and torsion of the tectorial membrane, and degeneration of the cyst, and rarely involving the utricle and semicircular canals. Deafness caused by mumps has a sudden onset. In severe cases, it is accompanied by nausea, vomiting and dizziness. Sometimes there is tinnitus or ear congestion. The deafness is usually unilateral; measles usually causes severe, bilateral symmetrical deafness, high frequency. Hearing loss is severe; deafness caused by meningitis is mostly total deafness and is not easy to recover.

(2) Acoustic neuroma: In addition to unilateral progressive deafness and tinnitus, patients with acoustic neuroma also have other symptoms of cranial nerve damage and increased intracranial pressure.


(3) Meniere's disease is due to autonomic nerve dysfunction, vascular and neurological dysfunction, increased capillary permeability, leading to hydrocephalus in the membranous labyrinth, expansion of the cochlear duct and saccule, and irritation of the cochlea. , vestibular receptors, a series of symptoms such as deafness, tinnitus, and vertigo occur. Often, due to repeated attacks, the hearing becomes sensorineural deafness that is difficult to recover.

(4) Labyrinthitis is a common complication of acute and chronic otitis media. The infection is caused by the corroded promontory or thrombosis of the translabyrinthine fistula, vestibular window, and cochlear window.Caused by phlebitis and other pathways, damage to the labyrinth leads to sensorineural deafness.


Clinically speaking, sensorineural hearing loss cannot be restored through drugs or surgery. This has been the result of a large number of basic and clinical studies over the years. Its testing has been fully confirmed. Many patients may not be able to accept such an answer and feel as if they have a terminal illness. In fact, there is no need to feel like this. Sensorineural deafness can be rehabilitated, such as wearing Hearing Aids or cochlear implants. Patients can still establish the ability to communicate with other people, and can live and work in society like people with normal hearing.

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