Sensorineural deafness is hearing loss caused by lesions of the cochlea and auditory nerve. Its main audiological features and diagnostic criteria are synchronized bone-conduction and air-conduction hearing loss with a threshold of 25 dB or more.
Common diseases that cause sensorineural deafness include: hereditary deafness, drug-induced deafness, infectious deafness, idiopathic sudden deafness, Meniere’s disease, autoimmune inner ear disease, noise acoustic injury, and brainstem demyelinating lesions such as acoustic neuroma and multiple sclerosis. The main symptoms are all characterized by hearing loss and tinnitus, with or without symptoms of balance disorders such as vertigo.
According to the 2021 WHO’s latest release of hearing degree grading method, the average hearing thresholds of 500Hz, 1000Hz, 2000Hz and 4000Hz are used as the basis:
Grading of deafness At present, clinicians in China still commonly use the WHO 1980 grading method, based on the average hearing threshold of 500Hz, 1000Hz or 2000Hz. Hearing loss of 20-40dB is mild deafness, 41-55dB is moderate deafness, 56-70dB is moderately severe deafness, 71-90dB is severe deafness, and greater than 91dB is extremely severe deafness.
When suffering from sensorineural deafness, you need to actively seek medical treatment, systematic examination and diagnosis, and follow the doctor’s instructions for standardized treatment.