Effect of cochlear implant technology in sequentially bilaterally implanted adults

Area of Science:

• Audiology
• Neurosurgery
• Biomedical Engineering

Background:

• Bilateral sequential cochlear implantation (BSCI) outcomes can be influenced by various factors, including the technology used in the second implanted ear.
• Understanding the impact of differing cochlear implant technologies on speech recognition is crucial for optimizing patient outcomes.

Purpose of the Study:

• To investigate the effect of cochlear implant technology on speech recognition in adult patients undergoing BSCI with different technologies in each ear.
• To determine if using newer or different technology in the second implanted ear impacts the benefits of bilateral stimulation.

Main Methods:

• Retrospective chart review of 20 adult patients who underwent BSCI with distinct technologies and processing strategies.
• Speech recognition was assessed using the Consonant-Nucleus-Consonant monosyllabic word test before and 1 year after implantation.
• Multivariate analysis accounted for factors like duration of deafness, device usage, and severity of hearing loss.

Main Results:

• Significant improvements in word scores were observed for individual ears and binaural conditions one year post-implantation across all groups.
• Consistent use of both devices was reported by all patients.
• The use of different technologies or processing strategies in the second cochlear implant did not negatively affect the patients' ability to benefit from bilateral stimulation.

Conclusions:

• Bilateral sequential cochlear implantation, even with newer or differing technology in the second ear, does not diminish the benefits of bilateral stimulation.
• The use of varied cochlear implant technology should not deter patients from pursuing second-sided implantation.