Cochlear Implantation in the Poorer-Hearing Ear Is a Reasonable Choice

Area of Science:

• Audiology
• Otolaryngology
• Neurosurgery

Background:

• Cochlear implantation (CI) is a treatment for severe to profound hearing loss.
• Optimal CI side selection for asymmetric hearing loss lacks robust evidence.
• Unilateral hearing aid use is common in patients with asymmetric hearing.

Purpose of the Study:

• To investigate the impact of CI surgery side (better vs. poorer hearing ear) on speech recognition outcomes.
• To identify predictors of speech recognition performance after unilateral CI in adults with asymmetric hearing.
• To evaluate the feasibility of unilateral CI in the poorer-hearing ear.

Main Methods:

• Retrospective review of audiological records for 74 adults with unilateral hearing aid use.
• Multiple regression analysis to determine predictors of post-CI speech recognition.
• Comparison of speech recognition and bimodal hearing rates based on CI ear.

Main Results:

• 52 patients (69%) received CI in the poorer-hearing ear.
• Higher post-CI bimodal hearing rates were observed in the poorer-ear CI group (77.8% vs. 22.2%).
• Prelingual hearing loss and patient age at CI significantly predicted speech recognition; CI side did not.

Conclusions:

• Unilateral CI in the poorer-hearing ear is a viable option for adults with postlingual hearing loss.
• This approach may enhance postoperative bimodal hearing opportunities.
• CI side selection should consider individual factors beyond just hearing asymmetry.