Hearing impairment

Introduction Moderate hearing loss refers to a hearing loss of 40-70 decibels, severe deafness refers to a hearing loss of 70-90 decibels, and deep deafness refers to a hearing loss of more than 90 decibels. Of course, regardless of the degree of deafness, medical testing and medical treatment are needed. Observing hearing defects in very small babies is not an easy task. Despite his baby's hearing impairment, he can still smile, kick his legs and react to the sound. Because the sound is accompanied by a stream of air, the baby feels and turns his head, making it difficult for parents to find his hearing defects. Because of this, it is very important and very important to check your hearing regularly after your baby is born. Conductive deafness, related to the outer and middle ear. The main cause of disability is severe chronic otitis caused by recurrent severe otitis. The main feature of conduction deafness is that hearing is usually mild to moderate. Therefore, treatment must be carried out as soon as possible. The statistics are worrying: 1/3 of the babies are suffering from this ear disease for two consecutive months before the age of three. But we don't have many babies to develop the number of conductive deafness. This disease can be cured with antibiotics and tympanic intubation. But if these methods do not improve your baby's hearing, then he may have sensory deafness, but it is not detected.

Cause

Each type of deafness involves different parts of the hearing organ. Some are related to the outer ear - auricle and ear canal, and some are related to the middle ear - tympanic membrane, auditory small bone, eustachian tube, and some are related to the inner ear - cochlear vestibule and auditory nerve. Sensory deafness is associated with the inner ear. This is because the hair cells of the inner ear are prematurely aging and die. 1 baby has this problem at birth, but this is not absolutely related to genetics. This may be because the mother is infected with the disease during pregnancy, infected with the fetus, such as diseases caused by cytomegalovirus, rubella, herpes, or plasma toxins; premature birth may also be one of the causes; some meningitis can also cause paralysis: Because the bacteria that cause inflammation of the meninges eroded into the inner ear cells.

an examination

Related inspection

Otolaryngology CT examination audiometer hearing test newborn hearing screening

Simply touching your finger and making a sound, the baby should react and turn his head in the direction of the sound. But this method is purely empirical and error-prone. Because the movement or air flow is enough to get your baby's attention, you don't need to hear the sound.

One method that is scientific and absolutely does not cause pain is the otoacoustic emission, that is, the inner ear emits a sound vibration through sound stimulation. The sound vibrations produced by the inner ear are recorded by a small detector consisting of a microphone and a micro-amplifier placed in the ear canal. This test method can detect false deafness (ie, the baby is not really deaf).

After a few months, the baby should also use another method to detect: hearing evoked potential detection. This method records the electrical impulses located in the auditory center of the cerebral cortex. The principle is relatively simple: place the electrodes in the baby's ears and on the scalp, recording the response of the cochlea, auditory nerves, and brainstem to each sound. The test is performed while the infant is asleep, sometimes under general anesthesia, because the doctor needs to determine that brain activity is caused by sound, not by other stimuli.

Differential diagnosis

Need to identify each other with the following symptoms:

Hearing: Hearing refers to the loss of hearing, the distortion of listening, and the light proof of deafness. Hearing loss, unclear listening, and repeated sounds are called hard of hearing.

Hearing fatigue: When you walk into a strong noise environment, you will feel uncomfortable. After stopping for a while, you will feel the hearing become dull. The slightest sound you can hear will not be heard. This is because your hearing threshold is up. , which causes your hearing to drop. However, as long as you leave the noise environment and rest for a period of time, the human hearing will gradually return to its original state. This phenomenon is called temporary hearing deviation, also known as hearing fatigue. It is only a temporary physiological phenomenon, and the hearing organs are not damaged. If working under strong noise for many years, the inner auditory organs are often stimulated by strong noise, and this auditory fatigue will be fixed and will not return to normal, resulting in permanent hearing loss or hearing threshold shift. This phenomenon is called noise deafness.

Ear vestibular hearing imbalance: scientific experiments show that if the ear vestibular hearing imbalance occurs, it will stimulate the brain central system to affect the normal work of the pituitary gland. To make the brain feel anxious; under the influence of this anxiety, people are very sensitive to various unsatisfactory things and generate resistance, so these unsatisfactory events will be infinitely magnified, eventually leading to depression and senile anxiety. occur.

Hearing: Meniere syndrome patients with deafness generally have a resounding phenomenon of hyperacoustic allergy, and some can listen to pure sound as two different tones of sound or timbre, that is, the phenomenon of Diplacusis.

Simply touching your finger and making a sound, the baby should react and turn his head in the direction of the sound. But this method is purely empirical and error-prone. Because the movement or air flow is enough to get your baby's attention, you don't need to hear the sound.

One method that is scientific and absolutely does not cause pain is the otoacoustic emission, that is, the inner ear emits a sound vibration through sound stimulation. The sound vibrations produced by the inner ear are recorded by a small detector consisting of a microphone and a micro-amplifier placed in the ear canal. This test method can detect false deafness (ie, the baby is not really deaf).

After a few months, the baby should also use another method to detect: hearing evoked potential detection. This method records the electrical impulses located in the auditory center of the cerebral cortex. The principle is relatively simple: place the electrodes in the baby's ears and on the scalp, recording the response of the cochlea, auditory nerves, and brainstem to each sound. The test is performed while the infant is asleep, sometimes under general anesthesia, because the doctor needs to determine that brain activity is caused by sound, not by other stimuli.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.