Fluctuating hearing loss

Introduction Volatile hearing loss is one of the clinical symptoms of Meniere's disease. Meniere's disease, Ménière's disease, also known as Meniere's syndrome (Ménière's syndrome, Meniere's disease, ear vertigo, vertigo) Meniere's disease for the inner eardrum lost water, manifested as seizures Sexual vertigo, fluctuating hearing loss and tinnitus.

Cause

The cause of Meniere's disease is still unclear and there are many different opinions. In 1938, Hallpike and Cairns reported that the main pathological change of this disease was the accumulation of water in the membrane. This finding has been confirmed by many scholars. However, how the membrane lost water is produced is difficult to explain. The currently known causes include the following factors: various infectious factors (bacteria, viruses, etc.), injuries (including mechanical or acoustic damage), otosclerosis, syphilis, genetic factors, allergies, tumors, leukemias, and autoimmune diseases. .

De Sousa (2002) refers to the vestibular symptom of membranous labyrinth caused by known causes as Meniere's syndrome. Meniere's disease is considered to be an idiopathic membrane labyrinth.

an examination

Related inspection

Hearing test, hearing test, tibia activity test, cochlear electrogram, auditory nerve examination

(1) Pure tone audiometry: can understand whether hearing is declining, the degree and nature of hearing loss. In the early stage, most of the low-frequency sensorineural hearing loss, the hearing curve showed a slight rise. After multiple episodes, high-frequency hearing decreases, and the hearing curve can be flat or descending. Pure tone audiometry can also dynamically observe the continuous change of the patient's hearing.

(2) Cochlear electrogram: This examination can objectively understand whether there is water in the membrane labyrinth. The -SP/AP amplitude ratio >0.37 has diagnostic significance and can indirectly indicate the presence of membrane labyrinth.

(3) Otoacoustic emission (OAE): It can first reflect the cochlear function of patients with early Meniere's disease. When the early pure tone of the disease is not found abnormal, TEOAE (transient evoked otoacoustic emission) can be weakened or induced. Not out.

Differential diagnosis

Need to be identified with the following symptoms:

Hearing impairment: 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.

Central deafness: Central deafness is one of the manifestations of hearing impairment, including brain stem central deafness and cortical deafness.

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