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.

Assessment and Outcome in Non-Traditional Cochlear Implant Candidates

2016 ◽  
Vol 21 (6) ◽  
pp. 383-390 ◽  
Author(s):  
Rebecca L. Heywood ◽  
Deborah A. Vickers ◽  
Francesca Pinto ◽  
George Fereos ◽  
Azhar Shaida
Keyword(s):  
New York ◽  
Speech Perception ◽  
Cochlear Implant ◽  
Predictive Factors ◽  
Speech Intelligibility ◽  
Age At Onset ◽  
Patient Expectations ◽  
Speech Discrimination ◽  
Profound Deafness ◽  
The Mean

The objectives of this study were to assess: (i) patient expectations met as a measure of outcome in early-deafened, late-implanted (non-traditional) cochlear implant recipients and (ii) pre-implantation predictive factors for postoperative speech perception. The notes of 13 recipients were retrospectively reviewed. The mean age at onset of profound deafness was 1.5 years (range 0-6). The mean age at implantation was 37 years (range 22-51 years). Patient expectations were assessed pre-operatively and 1 year after implantation. They were met or exceeded in 129/140 (92%) domains overall. A higher Speech Intelligibility Rating and audiovisual City University of New York sentence score before implantation were found to be positive predictive factors for improved speech discrimination after cochlear implantation.

Monosyllable speech perception of Japanese hearing aid users with prelingual hearing loss: implications for surgical indication of cochlear implant

2003 ◽  
Vol 67 (10) ◽  
pp. 1061-1067 ◽  
Author(s):  
Shoichiro Fukuda ◽  
Kunihiro Fukushima ◽  
Naomi Toida ◽  
Keiko Tsukamura ◽  
Yukihide Maeda ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Speech Perception ◽  
Cochlear Implant ◽  
Hearing Aid ◽  
Surgical Indication

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 Intracochlear Position of Cochlear Implants Determined Using CT Scanning versus Fitting Levels: Higher Threshold Levels at Basal Turn

2016 ◽  
Vol 21 (1) ◽  
pp. 54-67 ◽  
Author(s):  
Feddo B. van der Beek ◽  
Jeroen J. Briaire ◽  
Kim S. van der Marel ◽  
Berit M. Verbist ◽  
Johan H.M. Frijns
Keyword(s):  
Speech Perception ◽  
Cochlear Implants ◽  
Dynamic Range ◽  
Ct Scanning ◽  
Electrode Position ◽  
Insertion Depth ◽  
Threshold Levels ◽  
Lower Amplitude ◽  
Standard Profile

Objectives: In this study, the effects of the intracochlear position of cochlear implants on the clinical fitting levels were analyzed. Design: A total of 130 adult subjects who used a CII/HiRes 90K cochlear implant with a HiFocus 1/1J electrode were included in the study. The insertion angle and the distance to the modiolus of each electrode contact were determined using high-resolution CT scanning. The threshold levels (T-levels) and maximum comfort levels (M-levels) at 1 year of follow-up were determined. The degree of speech perception of the subjects was evaluated during routine clinical follow-up. Results: The depths of insertion of all the electrode contacts were determined. The distance to the modiolus was significantly smaller at the basal and apical cochlear parts compared with that at the middle of the cochlea (p < 0.05). The T-levels increased toward the basal end of the cochlea (3.4 dB). Additionally, the M-levels, which were fitted in our clinic using a standard profile, also increased toward the basal end, although with a lower amplitude (1.3 dB). Accordingly, the dynamic range decreased toward the basal end (2.1 dB). No correlation was found between the distance to the modiolus and the T-level or the M-level. Furthermore, the correlation between the insertion depth and stimulation levels was not affected by the duration of deafness, age at implantation or the time since implantation. Additionally, the T-levels showed a significant correlation with the speech perception scores (p < 0.05). Conclusions: The stimulation levels of the cochlear implants were affected by the intracochlear position of the electrode contacts, which were determined using postoperative CT scanning. Interestingly, these levels depended on the insertion depth, whereas the distance to the modiolus did not affect the stimulation levels. The T-levels increased toward the basal end of the cochlea. The level profiles were independent of the overall stimulation levels and were not affected by the biographical data of the patients, such as the duration of deafness, age at implantation or time since implantation. Further research is required to elucidate how fitting using level profiles with an increase toward the basal end of the cochlea benefits speech perception. Future investigations may elucidate an explanation for the effects of the intracochlear electrode position on the stimulation levels and might facilitate future improvements in electrode design.

scholarly journals Results for Chinese and English in a Multichannel Cochlear Implant Patient

1987 ◽  
Vol 96 (1_suppl) ◽  
pp. 126-127 ◽  
Author(s):  
S. A. Xu ◽  
R. C. Dowell ◽  
G. M. Clark
Keyword(s):  
Hearing Loss ◽  
Speech Perception ◽  
Cochlear Implant ◽  
Chinese Patient ◽  
Cochlear Prosthesis ◽  
Word Test ◽  
Open Set ◽  
Chinese And English ◽  
Speech Tracking

A multichannel cochlear prosthesis was implanted in a Chinese patient who suffered from profound sensory hearing loss. The preoperative Minimal Auditory Capabilities (MAC) battery tests in English, as well as an open set bisyllable word test, an open set sentence test, and speech tracking in Chinese indicated significant improvement of speech perception for both English and Chinese after the operation. Substantial understanding of running speech was possible in both languages without the help of lipreading.

scholarly journals Predicting Sequential Cochlear Implantation Performance: A Systematic Review

2017 ◽  
Vol 22 (6) ◽  
pp. 356-363 ◽  
Author(s):  
Yvette E. Smulders ◽  
Thomas Hendriks ◽  
Robert H. Eikelboom ◽  
Inge Stegeman ◽  
Peter L. Santa Maria ◽  
...  
Keyword(s):  
Systematic Review ◽  
Hearing Loss ◽  
Speech Perception ◽  
Cochlear Implantation ◽  
Age At Onset ◽  
Hearing Aid Use ◽  
Long Duration ◽  
Cochrane Database ◽  
Expected Benefits ◽  
Negative Factors

This systematic review of the literature reveals which pre­operative factors affect sequential cochlear implantation outcomes in adults. The findings can help health care prof­essionals provide evidence-based advice on the expected benefits from a second cochlear implant (CI). We searched PubMed, EMBASE, and the Cochrane database from November 1977 to August 26, 2017, using the terms “sequential cochlear implantation”; the most frequently cited predictors for unilateral cochlear implantation performance and other potential predictors for sequential implantation outcome; and “speech perception,” “localization” as well as synonyms of all of the above. Ten studies were included. The effects of age, duration of hearing loss, time between implantations, preoperative hearing, etiology of hearing loss, hearing aid use and duration of follow-up on sequential cochlear implantation performance were studied. The literature has shown that duration of deafness, age at onset of deafness, etiology of hearing loss, and preoperative speech perception score are (inversely) related to unilateral cochlear implantation outcome in adults. One would expect that these factors would also affect sequential bilateral implantation outcome. However, the best available evidence to date shows that advanced age, a long duration of deafness, or a long interval between implantations should not be considered negative factors when considering sequential bilateral cochlear implantation.

Cochlear Implants in Pediatric Bacterial Meningitis

2008 ◽  
Vol 139 (2_suppl) ◽  
pp. P63-P63
Author(s):  
Brandon Isaacson ◽  
Kenneth H Lee ◽  
Joe W Kutz ◽  
Peter S Roland
Keyword(s):  
Hearing Loss ◽  
Bacterial Meningitis ◽  
Cochlear Implant ◽  
Tertiary Care ◽  
Performance Outcomes ◽  
Case Review ◽  
Retrospective Case ◽  
Labyrinthitis Ossificans ◽  
Cochlear Ossification ◽  
And Performance

Objective 1) To determine pediatric cochlear implant performance outcomes for hearing loss secondary to bacterial meningitis. 2) To determine if a performance difference exists in pediatric cochlear implant patients with and without labyrinthitis ossificans. Methods A retrospective case review was performed at a tertiary care multi-disciplinary cochlear implant program. 45 children were implanted from 1991 to 2006 whose hearing loss resulted from bacterial meningitis. Mode of communication, school placement and performance were reviewed. Results 21 patients(52%) were in a mainstream educational enviroment and 19 (48%) were in a special needs enviroment. 24 subjects (58%) used an auditory-verbal mode of communication, while 17 (42%) used total communication. The mean speech reception threshold was 28dB with a range from 5 to 65dB. 14 subjects (56%) had labyrinthis ossifcans, while 11 subjects (44%) did not. Conclusions The present study demonstrated that over half of our subjects developed labyrinthitis ossificans. Despite the presence of cochlear ossification, patients with bacterial meningitis-induced hearing loss can often perform in a main-stem classroom with auditory-verbal communication.

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