H90.4

Clinical Causes: Age-related hearing loss (presbycusis) Noise exposure damaging inner ear structures Head injury or trauma affecting the cochlea or auditory nerve Infections such as meningitis or viral illnesses damaging inner ear components Sudden sensorineural hearing loss, often idiopathic but sometimes linked to vascular issues Ototoxic medications that harm the inner ear, like certain antibiotics or chemotherapy drugs Inherited genetic conditions affecting the auditory system Tumors such as vestibular schwannoma (acoustic neuroma) impacting the auditory nerve Autoimmune inner ear disease causing inflammation and damage Certain neurological disorders impacting auditory pathways

Key Symptoms: Sudden or gradual loss of hearing in one ear Difficulty understanding speech, especially in noisy environments Tinnitus (ringing or buzzing) in the affected ear A feeling of fullness or pressure in the affected ear Possible balance disturbances if the inner ear or vestibular system is involved No significant hearing loss in the opposite ear, which often remains functional

Diagnosis Path: Diagnosis of unilateral sensorineural hearing loss typically involves a comprehensive audiological evaluation, which includes hearing tests like pure-tone audiometry and speech discrimination tests. Additional assessments may include otoacoustic emissions and auditory brainstem response (ABR) testing to evaluate inner ear and neural pathways. Imaging studies such as MRI or CT scans are often recommended to identify structural causes like tumors or inner ear malformations. A detailed medical history and physical examination help rule out other conditions and determine the underlying cause.

Treatment Protocols: Treatment options depend on the underlying cause and severity of the hearing loss. Possible approaches include: - **Medical therapies**: Corticosteroids may be prescribed for sudden sensorineural hearing loss to reduce inflammation. - **Surgical interventions**: Tumor removal or repair of structural damages may be necessary in certain cases. - **Hearing aids**: Unilateral hearing loss can often be managed with a hearing device in the affected ear, enhancing sound detection. - **Cochlear implants**: In cases of profound hearing loss, implantable devices may restore hearing capabilities. - **Rehabilitation and support**: Auditory training and counseling can help manage communication challenges. It is essential for individuals experiencing hearing loss to consult a healthcare professional for a proper diagnosis and tailored management plan.