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Published on: August 4, 2023
Implications of minimizing trauma during conventional cochlear implantation
Matthew L Carlson1, Colin L W Driscoll, René H Gifford
1Department of Otolaryngology Head and Neck Surgery, Mayo Clinic School of Medicine, Rochester, Minnesota 55905, USA.
Summary
Minimally traumatic cochlear implantation (CI) techniques can improve speech perception scores. Preserving some hearing during CI surgery is possible in over 50% of patients, leading to better outcomes.
Area of Science:
- Otolaryngology
- Neurosurgery
- Audiology
Background:
- Cochlear implantation (CI) aims to restore hearing in individuals with severe to profound hearing loss.
- Minimally traumatic surgical techniques and advanced electrode arrays are increasingly used in CI procedures.
- The impact of surgical trauma on hearing preservation and speech perception post-CI requires further elucidation.
Purpose of the Study:
- To investigate the relationship between implantation-associated trauma and postoperative speech perception.
- To evaluate outcomes in adult and pediatric patients undergoing CI with conventional length electrodes and minimally traumatic techniques.
Main Methods:
- Retrospective chart review of 126 CI patients (2002-2010) at a tertiary academic center.
- Analysis of pre- and post-implantation audiometric thresholds and speech recognition scores.
- Utilized postimplantation pure tone threshold shifts as a surrogate for intracochlear injury.
Main Results:
- Hearing preservation was achieved in 55% of patients.
- Patients with hearing preservation demonstrated significantly better speech perception in the CI-only condition.
- Minimizing surgical trauma correlated with improved speech perception in the electric condition.
Conclusions:
- Conservation of acoustic hearing during CI is achievable in over 50% of cases with modern techniques.
- Minimally traumatic CI surgery enhances speech perception outcomes, even for electric-only stimulation.
- These findings support the routine use of minimally traumatic techniques in all cochlear implant recipients.