Effects of Insertion Depth of Cochlear Implant Electrodes upon Speech Perception

2004 ◽  
Vol 9 (3) ◽  
pp. 163-172 ◽  
Author(s):  
Kumiko Yukawa ◽  
Lawrence Cohen ◽  
Peter Blamey ◽  
Brian Pyman ◽  
Viruch Tungvachirakul ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Insertion Depth

scholarly journals Angular Electrode Insertion Depth and Speech Perception in Adults With a Cochlear Implant

2019 ◽  
Vol 40 (7) ◽  
pp. 900-910 ◽  
Author(s):  
Floris Heutink ◽  
Simone R. de Rijk ◽  
Berit M. Verbist ◽  
Wendy J. Huinck ◽  
Emmanuel A. M. Mylanus
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Insertion Depth ◽  
Electrode Insertion

scholarly journals Relationship Between Electrocochleography, Angular Insertion Depth, and Cochlear Implant Speech Perception Outcomes

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Michael W. Canfarotta ◽  
Brendan P. O’Connell ◽  
Christopher K. Giardina ◽  
Emily Buss ◽  
Kevin D. Brown ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Insertion Depth

Comparison of the HiFocus Mid-Scala and HiFocus 1J Electrode Array: Angular Insertion Depths and Speech Perception Outcomes

2016 ◽  
Vol 21 (5) ◽  
pp. 316-325 ◽  
Author(s):  
M. Annerie van der Jagt ◽  
Jeroen J. Briaire ◽  
Berit M. Verbist ◽  
Johan H.M. Frijns
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Electrode Array ◽  
Lateral Wall ◽  
Neural Stimulation ◽  
Insertion Depth ◽  
Optimal Distance ◽  
Frequency Mismatch ◽  
The Mean

The HiFocus Mid-Scala (MS) electrode array has recently been introduced onto the market. This precurved design with a targeted mid-scalar intracochlear position pursues an atraumatic insertion and optimal distance for neural stimulation. In this study we prospectively examined the angular insertion depth achieved and speech perception outcomes resulting from the HiFocus MS electrode array for 6 months after implantation, and retrospectively compared these with the HiFocus 1J lateral wall electrode array. The mean angular insertion depth within the MS population (n = 96) was found at 470°. This was 50° shallower but more consistent than the 1J electrode array (n = 110). Audiological evaluation within a subgroup, including only postlingual, unilaterally implanted, adult cochlear implant recipients who were matched on preoperative speech perception scores and the duration of deafness (MS = 32, 1J = 32), showed no difference in speech perception outcomes between the MS and 1J groups. Furthermore, speech perception outcome was not affected by the angular insertion depth or frequency mismatch.

scholarly journals Effects of in vivo repositioning of slim modiolar electrodes on electrical thresholds and speech perception

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sang-Yeon Lee ◽  
Young Seok Kim ◽  
Hyung Dong Jo ◽  
Yoonjoong Kim ◽  
Marge Carandang ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Functional Outcomes ◽  
Cadaveric Study ◽  
Scala Tympani ◽  
Insertion Depth ◽  
Sentence Recognition ◽  
Open Set

AbstractThe slim modiolar electrode has been reported to ensure better modiolar proximity than previous conventional perimodiolar electrodes and consistently high scala tympani localization. Nonetheless, variability in modiolar proximity exists even among slim modiolar electrodes, still leaving room for further improvement of modiolar proximity, which may positively affect functional outcomes. Given this, the pull-back maneuver was reported to increase the modiolar proximity of slim modiolar electrodes in a cadaveric study, but in vivo repositioning effects remain to be established. Here we identified that the pull-back maneuver led to better modiolar proximity than conventional insertion while maintaining a similar angular insertion depth. Notably, the reduced electrode-modiolus distance from the pull-back maneuver was associated with significantly lower impedances across electrodes postoperatively as well as reduced intraoperative electrophysiological thresholds than conventional insertion. Among adult cochlear implant recipients, this maneuver resulted in significantly better sentence recognition scores at three months postoperatively when compared to those with a conventional insertion; however, this benefit was not observed at later intervals. Collectively, slim modiolar electrodes with the pull-back maneuver further enhance the modiolar proximity, possibly leading to better open-set sentence recognition, at least in the early postoperative stage.

The Influence of Cochlear Implant Electrode Position on Performance

2015 ◽  
Vol 20 (3) ◽  
pp. 202-211 ◽  
Author(s):  
Kim S. van der Marel ◽  
Jeroen J. Briaire ◽  
Berit M. Verbist ◽  
Tjeerd J. Muurling ◽  
Johan H.M. Frijns
Keyword(s):  
Hearing Loss ◽  
Speech Perception ◽  
Cochlear Implant ◽  
Age At Onset ◽  
Performance Outcomes ◽  
Patient Specific ◽  
Electrode Position ◽  
Insertion Depth ◽  
Large Patient ◽  
Large Patient Population

Objectives: To study the relation between variables related to cochlear implant electrode position and speech perception performance scores in a large patient population. Design: The study sample consisted of 203 patients implanted with a CII or HiRes90K implant with a HiFocus 1 or 1J electrode of Advanced Bionics. Phoneme and word score averages for the 1- and 2-year follow-up were calculated for 41 prelingually deaf and 162 postlingually deaf patients. Analyses to reveal correlations between these performance outcomes and 6 position-related variables (angle of most basal electrode contact, surgical insertion angle, surgical insertion, wrapping factor, angular insertion depth, linear insertion depth) were executed. The scalar location, as an indication for the presence of intracochlear trauma, and modiolus proximity beyond the basal turn were not evaluated in this study. In addition, different patient-specific variables (age at implantation, age at onset of hearing loss, duration of deafness, preoperative phoneme and word scores) were tested for correlation with performance. Results: The performance scores of prelingual patients were correlated with age at onset of hearing loss, duration of deafness and preoperative scores. For the postlingual patients, performance showed correlations with all 5 patient-specific variables. None of the 6 position-related variables influenced speech perception in cochlear implant patients. Conclusions: Although several patient-specific variables showed correlations with speech perception outcomes, not one of the studied angular and linear position-related variables turned out to have a demonstrable influence on performance.

scholarly journals Logatome Discrimination in Cochlear Implant Users: Subjective Tests Compared to the Mismatch Negativity

2010 ◽  
Vol 10 ◽  
pp. 329-339 ◽  
Author(s):  
Torsten Rahne ◽  
Michael Ziese ◽  
Dorothea Rostalski ◽  
Roland Mühler
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Mismatch Negativity ◽  
Speech Intelligibility ◽  
Event Related Potentials ◽  
Normal Hearing ◽  
Discrimination Test ◽  
Speech Database ◽  
Automated Speech Recognition ◽  
Related Potentials

This paper describes a logatome discrimination test for the assessment of speech perception in cochlear implant users (CI users), based on a multilingual speech database, the Oldenburg Logatome Corpus, which was originally recorded for the comparison of human and automated speech recognition. The logatome discrimination task is based on the presentation of 100 logatome pairs (i.e., nonsense syllables) with balanced representations of alternating “vowel-replacement” and “consonant-replacement” paradigms in order to assess phoneme confusions. Thirteen adult normal hearing listeners and eight adult CI users, including both good and poor performers, were included in the study and completed the test after their speech intelligibility abilities were evaluated with an established sentence test in noise. Furthermore, the discrimination abilities were measured electrophysiologically by recording the mismatch negativity (MMN) as a component of auditory event-related potentials. The results show a clear MMN response only for normal hearing listeners and CI users with good performance, correlating with their logatome discrimination abilities. Higher discrimination scores for vowel-replacement paradigms than for the consonant-replacement paradigms were found. We conclude that the logatome discrimination test is well suited to monitor the speech perception skills of CI users. Due to the large number of available spoken logatome items, the Oldenburg Logatome Corpus appears to provide a useful and powerful basis for further development of speech perception tests for CI users.

scholarly journals Meta-Analysis—Correlation between Spiral Ganglion Cell Counts and Speech Perception with a Cochlear Implant

2021 ◽  
Vol 11 (2) ◽  
pp. 220-226
Author(s):  
Yew-Song Cheng ◽  
Mario A. Svirsky
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Ganglion Cells ◽  
Meta Analysis ◽  
Spiral Ganglion ◽  
Spiral Ganglion Cell ◽  
Cell Counts ◽  
Temporal Bones ◽  
The Relationship ◽  
Existing Data

The presence of spiral ganglion cells (SGCs) is widely accepted to be a prerequisite for successful speech perception with a cochlear implant (CI), because SGCs provide the only known conduit between the implant electrode and the central auditory system. By extension, it has been hypothesized that the number of SGCs might be an important factor in CI outcomes. An impressive body of work has been published on findings from the laborious process of collecting temporal bones from CI users and counting the number of SGCs to correlate those numbers with speech perception scores, but the findings thus far have been conflicting. We performed a meta-analysis of all published studies with the hope that combining existing data may help us reach a more definitive conclusion about the relationship between SGC count and speech perception scores in adults.

Psychophysical and speech perception studies: A case report on a binaural cochlear implant subject

1993 ◽  
Vol 94 (6) ◽  
pp. 3178-3189 ◽  
Author(s):  
R. J. M. van Hoesel ◽  
Y. C. Tong ◽  
R. D. Hollow ◽  
G. M. Clark
Keyword(s):  
Case Report ◽  
Speech Perception ◽  
Cochlear Implant

Reduction in High-Frequency Hearing Aid Gain Can Improve Performance in Patients With Contralateral Cochlear Implant: A Pilot Study

2015 ◽  
Vol 24 (4) ◽  
pp. 462-468 ◽  
Author(s):  
Jessica J. Messersmith ◽  
Lindsey E. Jorgensen ◽  
Jessica A. Hagg
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Chart Review ◽  
Hearing Aid ◽  
Retrospective Chart Review ◽  
Improve Performance ◽  
Bimodal Condition ◽  
Overall Performance ◽  
Age Range ◽  
Clinic Population

Purpose The purpose of this study was to determine whether an alternate fitting strategy, specifically adjustment to gains in a hearing aid (HA), would improve performance in patients who experienced poorer performance in the bimodal condition when the HA was fit to traditional targets. Method This study was a retrospective chart review from a local clinic population seen during a 6-month period. Participants included 6 users of bimodal stimulation. Two performed poorer in the cochlear implant (CI) + HA condition than in the CI-only condition. One individual performed higher in the bimodal condition, but the overall performance was low. Three age range–matched users whose performance increased when the HA was used in conjunction with a CI were also included. The HA gain was reduced beyond 2000 Hz. Speech perception scores were obtained pre- and postmodification to the HA fitting. Results All listeners whose HA was programmed using the modified approach demonstrated improved speech perception scores with the modified HA fit in the bimodal condition when compared with the traditional HA fit in the bimodal condition. Conclusion Modifications to gains above 2000 Hz in the HA may improve performance for bimodal listeners who perform more poorly in the bimodal condition when the HA is fit to traditional targets.

Sign in / Sign up

Export Citation Format

Share Document