1. External ear diseases that can lead to deafness: cerumen embolism, atresia of external ear canal, stenosis of external ear canal caused by inflammation and tumor of external ear canal, etc.
2. The inner ear diseases that can lead to deafness include various acute and chronic otitis media, middle ear tumors, tympanic membrane trauma, ossicular fracture or dislocation, otosclerosis, etc.
3. The diseases of inner ear, auditory nerve and nervous system that can lead to deafness include the ear complications of various acute and chronic infectious diseases, such as epidemic myelitis, epidemic encephalitis B, measles, scarlet fever, rubella, etc. in addition to the hearing loss caused by oxygen otitis media, it will also invade the inner ear and its afferent pathway, resulting in sensorineural deafness.
4. In addition, drug or chemical poisoning, labyrinthitis, membranous labyrinthine hydrops, temporal bone fracture, auditory trauma, acoustic neuroma, craniocerebral trauma, cerebrovascular accident or spasm are also the main factors causing sensorineural deafness, which belongs to the category of senile deafness.
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