Changes in tinnitus after cochlear implantation and its relation with psychological functioning.

Area of Science:

• Otolaryngology
• Audiology
• Neurosurgery

Background:

• Tinnitus is a common symptom impacting quality of life.
• The effect of cochlear implantation on tinnitus is not fully understood.
• Prevalence and changes in tinnitus post-implantation require further investigation.

Purpose of the Study:

• To assess tinnitus prevalence before and after cochlear implantation.
• To evaluate changes in tinnitus severity and handicap.
• To explore the relationship between tinnitus changes and patient-reported outcomes.

Main Methods:

• Retrospective study of 212 cochlear implant patients (2000-2009).
• Utilized standardized questionnaires assessing tinnitus handicap (Tinnitus Handicap Inventory, Tinnitus Handicap Questionnaire), hearing loss, and anxiety/depression.
• Patients completed pre- and post-implantation assessments at least 6 months after surgery.

Main Results:

• 51.3% of patients had preoperative tinnitus; 55.6% of these reported reduction or cessation post-implantation.
• 8.2% with preoperative tinnitus experienced worsening; 19.6% without preoperative tinnitus developed new tinnitus.
• Tinnitus changes correlated with Tinnitus Handicap Inventory and Tinnitus Handicap Questionnaire scores; hearing handicap, anxiety, and depression decreased.

Conclusions:

• Cochlear implantation can lead to significant tinnitus reduction in many patients.
• A subset of patients may experience new or aggravated tinnitus post-implantation, typically with mild handicap.
• Overall, cochlear implantation improves hearing handicap, anxiety, and depression, with tinnitus often improving concurrently.