What are the causes of deafness? What are the causes of deafness?

Deafness can be divided into conductive deafness, sensorineural deafness, mixed deafness, non-organic deafness, etc., and different types of deafness may be caused by different causes.

1. If it is conductive deafness, it may be caused by congenital factors or acquired factors.

1. Congenital factors: If the patient has auricular dysplasia, ear canal malformation, ear canal atresia, etc., it will hinder the transmission of external sound waves into the inner ear, resulting in the occurrence of conductive hearing loss.

2. Acquired factors: if the patient suffers from cerumen embolism, cholesteatoma of the external auditory canal and other diseases, cerumen and cholesteatoma may block the external auditory canal and further affect the sound wave afferent to the inner ear, resulting in the occurrence of conductive hearing loss; If the patient has a perforated eardrum, ossicular chain fracture, ossicular chain dislocation, etc., the pathway of sound waves to the middle ear will be interrupted, resulting in conductive hearing loss.

2. If it is sensorineural hearing loss, it may be caused by genetic factors, environmental factors, and certain medications.

1. Genetic factors: If there is a deafness gene in the family, when the family member reaches a certain age, it may develop the disease.

2. Environmental factors: If the patient is in a noisy environment for a long time, it may lead to the occurrence of sensorineural hearing loss.

3. Certain drugs: If the patient takes some drugs with ototoxicity, such as streptomycin, gentamicin and other aminoglycoside antibiotics, sensorineural hearing loss will also occur.

3. In the case of mixed hearing loss, it may be caused by one disease affecting both the ear and the sensory system, or it may be caused by multiple diseases affecting the ear transmission and sensory system respectively.

4. If it is non-organic deafness, it may be caused by mental and psychological factors, and such patients often have a history of psychological trauma.

Deafness refers to different degrees of hearing loss, divided into partial deafness and complete deafness, no matter what the cause, can cause different degrees of hearing loss, hearing loss is not completely referred to as partial deafness, complete loss is complete deafness.

The causes of deafness are very complex, congenital factors, genetic factors, diseases, trauma factors, drug factors, environmental factors, etc., congenital factors include genetic factors, infection during pregnancy and childbirth.

Hearing loss occurs at birth and shortly after birth, and of course, it may be delayed.

Acquired deafness can occur at any age. For example, the risk of hearing loss increases as we age; The environment or noise is too loud and exceeds the normal tolerance threshold; Noise pollution for a long time, etc. Here are the common deafness**::

1. Genetic factors:

Due to genetic or chromosomal abnormalities.

and other genetic defects can lead to hearing impairment, most often sensorineural hearing loss.

2. Maternal environmental impact during pregnancy:

It refers to the child's maternal infection or poisoning during embryonic development, perinatal or delivery.

or the influence of pathological factors such as trauma that leads to hearing impairment. For example, the mother's improper use of drugs during pregnancy, suffering from certain infectious diseases, improper use of forceps during childbirth, etc.

3. Infectious factors:

Such as meningitis. Measles.

and mumps. and otitis media.

Wait. 4. Tumor:

Acoustic neuroma. Patients may experience deafness due to tumor bleeding, edema of surrounding tissues, etc., which compresses the cochlear nerve.

5. Ototoxic drugs.

Certain medications can damage hearing, and there are currently more than 200 drugs and chemicals that have been documented to induce hearing***.

Trauma. In particular, skull fractures.

Putting the ear at serious risk of hearing loss.

Abrupt changes in air pressure.

For example, diving, or when an airplane is taking off and landing, it may cause the inner ear fluid to move, and occasionally leakage or rupture, which can lead to damage to the inner ear nerve.

8. Others: Deafness can also occur due to mental and psychological factors, and transient deafness can occur with certain noises and detonations.

Disease analysis: In fact, there are many causes of deafness, and from the perspective of disease types, deafness can be divided into conductive deafness, sensorineural deafness, and mixed deafness: conductive deafness is caused by diseases of the outer and middle ear, causing damage to the entire conductive structure, resulting in hearing loss, which is called conductive deafness.

The most common lesions include total external ear lesions, auricular embolism, mild hearing loss, or eczema and otitis media of the external auditory canal.

Hello dear. (1) Inflammation: acute and chronic purulent otitis media, acute and chronic secretory otitis media, adhesive otitis media, bullous myringitis, acute mastoiditis and inflammation of the external auditory canal, boils and swelling of the external auditory canal that narrow or even occlude the eardrum and affect the movement of the eardrum.

2) Trauma: Temporal bone fracture involving the middle ear, tympanic membrane trauma, ossicular chain interruption, etc. (3) Foreign body or other mechanical obstruction:

External auditory canal foreign body, cerumen embolism, tumors, cholesteatoma, etc. (4) Malformations: congenital atresia of the external auditory canal, oscletic chain malformation, loss of tympanic membrane, vestibular window and/or cochlear window hypoplasia.

Hope mine can help you.

Infections, common ones are myringitis, secretory otitis media, labyrinthitis and so on. Inflammation of the infected site can drain pus and block the external or inner auditory canal, resulting in decreased sound wave conduction. Tumors, common ones are middle ear cancer and tympanic body tumors.

The enlarged part of the tumor can block the conduction of sound waves in the external or internal auditory canal. Immunity, common diseases are autoimmune inner ear disease. The autoimmune cells attack the auditory nerve cells, causing hearing loss.

Meniere's disease, in which fluid forms in the inner ear, causing intermittent episodes of deafness, vertigo and tinnitus. Otosclerosis, which is caused by the overgrowth of bone in the inner ear, is also the most common form of conductive hearing loss**. Related diseases, secretory otitis media, myringitis, labyrinthitis, middle ear cancer, tympanic body tumor, autoimmune inner ear disease non-disease ** element, common drugs are gentamicin, streptomycin, kanamycin, neomycin.

Ototoxic drugs can cause the inner ear to malfunction, leading to hearing loss. Foreign bodies, commonly cerumen plugging. Conduction of sound waves that block the external ear canal.

Trauma, common are perforation of the eardrum, loud noises, sudden changes in pressure, and perforation of the eardrum caused by objects affecting hearing. Aging, hearing loss is a normal manifestation of the aging process, and age-related deafness is called presbycusis, which is a neurological hearing loss that is the result of the gradual aging and death of the hair cells of the inner ear with age, but no new cells to replace them. Noise, if regularly exposed to noise for several years, can cause neural hearing loss due to damage to the hair cells that sense sound in the inner ear, and noise above 80 decibels is a potential cause of deafness**, including rock clubs, sirens, electric drills, electronic drums, and lawn mowers.

Earwax, which is a substance normally secreted by the outer ear, can cause hearing loss if too much earwax accumulates, or if the earwax enters the ear canal too deeply. There are several genes that make people congenitally deaf by influencing the development of the ear and affecting the function of sensory nerve hair cells. Birth defects, newborns may be affected by a variety of factors that can cause hearing loss, such as pregnancy complications, intrauterine infections, and premature birth.

Drugs and emotions.

Gentamicin is the main drug that causes toxic deafness. It can cause damage to both the vestibule and cochlea of the ear and can cause irreversible hearing loss if the drug is accidentally used by the child. In addition to gentamicin, streptomycin, kanamycin, quinine, and heavy metal preparations are all ototoxic drugs and should be used with caution.

Stress, stress and emotion can also cause hearing loss in a short period of time, resulting in sudden deafness.

Noise and trauma.

Excessive and persistent noise can adversely affect the central nervous system, especially damage to the auditory organs, dull neural deafness. Perforation of the tympanic membrane due to trauma can cause conductive hearing loss; Traumatic brain injury, damage to the inner ear, sudden knocking, or sudden changes in air pressure can all cause neural hearing loss.

Infection & Disease.

Diseases such as meningococcal meningitis, mumps, measles and colds can be deformed, atrophied or inflamed and dissolved by ganglion cells, invading the auditory nerve trunk, making it inflamed or compressed by the scar left by the surrounding inflammation, and sometimes the cells of the auditory nerve nucleus can be edema or even dissolved, resulting in deafness.