Cochlear Implant Candidacy in Single-Sided Deafness with Intractable Tinnitus
A 39-year-old woman has had right single-sided deafness for 3 years after a vestibular schwannoma resection, with severe disabling tinnitus in the deaf ear. Left hearing is normal (PTA 15 dB, word recognition 96%). She has tried masking and counseling without relief. She asks about a cochlear implant for the deaf ear, specifically whether it will help her tinnitus and whether it risks her good ear.
1. How do you evaluate cochlear implant candidacy for single-sided deafness and tinnitus in this patient?
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Evaluation framework:
- Candidacy criteria: SSD with normal contralateral hearing, disabling tinnitus, and failure of conservative management; confirm with audiometry, word recognition, and tinnitus severity measures. Assess cochlear anatomy (MRI/CT) and prior surgery site.
- Expected benefit: CI in SSD can improve spatial hearing, speech-in-noise, and tinnitus in many patients; tinnitus reduction is variable and not guaranteed.
- Risks: Surgery risks to the only-hearing ear are low but real (device failure, infection, facial nerve injury); emphasize that the contralateral ear is not at risk from implantation of the deaf ear.
- Counseling: Frame as a trial with realistic expectations; document tinnitus outcome measures and plan for rehabilitation.
2. What outcomes do you measure and how do you counsel her about the risk to her good ear and the possibility of limited benefit?
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Outcome measures:
- Audiometry (both ears), speech-in-noise and localization testing, tinnitus handicap inventory, and quality-of-life measures at baseline and intervals post-activation.
- Counseling: The good ear is not operated on; the main risks are to the implanted ear and are uncommon. Benefit for tinnitus is likely but variable-some patients get substantial relief, others partial or none. Set expectations and plan for auditory rehabilitation and device programming.
- Decision: Shared decision-making with a trial mindset and defined review points.