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Benefits Afforded by Precurved Electrode Arrays: Speech and Auditory Perception for Adult Cochlear Implant Recipients

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1.  Which of the following statements regarding number of channels and benefit to CI patients is true? There is evidence suggesting that patients can have benefit with more than 5 to 8 channels within their cochlear implant system Having more channels has been shown to have no benefit The data suggests the fewest amount of channels would provide the most benefit There have not been any studies conducted to look at this question.

2.  When characterizing adult CI outcomes: There is considerable variance in the historical literature due to unknown variables such as scalar location Most studies in the literature have not reported average CI wear time thereby making it difficult to reconcile whether the broad range of auditory scores are reliable for highly experienced CI users Well-placed precurved electrode arrays may provide greater channel independence and higher auditory outcomes than straight arrays localized near the lateral wall All of the above

3.  Without image-based confirmation of electrode insertion and scalar location: Some precurved electrodes may be overinserted so that the middle portion of the array sits closer to the lateral wall There could be extracochlear electrodes that we’re unaware of as patient reports may be unreliable and impedances within normal limits. We cannot necessarily offer precision-based audiology for our patients as we do not know the location of the electrode array and individual electrical contacts relative to the stimulation targets (i.e. spiral ganglion cells All of the above

4.  Which of the statements is true regarding device wear time and speech performance in adult and pediatric CI recipients Multiple studies have been conducted suggesting that device wear time is significantly and positively correlated with speech performance Studies have shown that device wear time should be reduced to improve speech performance Multiple studies have been conducted suggesting that device wear time is non-significant and negatively correlated with speech performance There is not clear evidence that device wear time impacts performance.

5.  Which of the following statements is true regarding Precurved electrode arrays (e.g., CI632) and speech recognition outcomes in adult CI recipients? Precurved arrays are associated with significantly higher speech recognintion performance when controlling for scala tympani placement Precurved arrays are associated with lower speech recognition outcomes All cochlear implant recipients perform the same regardless of the electrode being used Straight arrays have superior outcomes

6.  The following increase of maxima has shown in studies the potential of improving speech recognition. From a maxima of 2 to 8 From the default maxima of 8 to 16 From a maxima of 6 to 8 There has not been any work done in this area

7.  Though there are papers describing the correlation between CI wear time and speech recognition outcomes We cannot infer causation at present We can infer causation at present There is not a correlation or causation The studies have not been performed to see a correlation

8.  Which of the following is a true statement regarding hearing preservation and precurved electrode arrays: Precurved electrode arrays are unable to preserve hearing Hearing preservation and precurved arrays has not been studied Precurved electrode arrays have shown the potential to preserve hearing Precurved arrays preserve hearing in all patients

9.  When looking at rates of translocation between historical pre-curved arrays and straight arrays, which of the following is true: Historical pre-curved rates of translocation were equal to straight arrays Historical pre-curved rates of translocation rates were lower than straight arrays Historical pre-curved rates of translocation rates were higher than straight arrays The data has not been collected.

10.  The following factors have been shown to influence postoperative cochlear implant auditory outcomes: Device wear time Electrode array type and scalar location Underlying neural health as evidenced via electrocochleography All of the above