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20Q: Update on Cochlear Implants: Hearing Preservation, Single-Sided Deafness, and Personalized Fitting

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1.  Which of the following is NOT an indication for cochlear implantation? Bilateral severe-to-profound sensorineural hearing loss Bilateral normal-to-moderate low-frequency hearing and severe-to-profound high-frequency sensorineural hearing loss Bilateral mild conductive hearing loss Unilateral profound sensorineural hearing loss (also known as single-sided deafness)

2.  For cochlear implant patients with hearing preservation, what is an additional test that is recommended post-operatively that is NOT part of the typical test battery for patients with bilateral profound sensorineural hearing loss? Measure unaided hearing detection thresholds Counsel on how to use the device Test speech recognition Counsel on battery life

3.  What benefits have been reported for patients with single-sided deafness when listening with a cochlear implant as compared to preoperative performance or listening with a CROS hearing aid or bone conduction device? Speech recognition in noise Sound source localization Subjective benefit / quality of life All of the above

4.  What are electric frequency-to-place mismatches? Acoustic settings Discrepancies between the frequency information presented by an electrode contact and the cochlear place frequencies Compression Directional microphones

5.  How can imaging (e.g., CT scan) be used to personalize the fitting/mapping of cochlear implant and electric-acoustic stimulation devices? Identify the cochlear place frequencies of electrode contacts and adjust the filter frequencies to match the cochlear tonotopy (eliminating electric frequency-to-place mismatches) Identify electrode contacts that are within the region of functional hearing and reduce the stimulation levels for those channels to limit electric-on-acoustic interference. All of the above None of the above