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Cochlear Implants International

Paola V Incerti, Teresa Yc Ching, Robert Cowan
OBJECTIVE: To investigate the effect of varying cross-over frequency (CF) settings for electric-acoustic (EA) stimulation in one ear combined with acoustic (A) hearing in the opposite ear on binaural speech perception, localization and functional performance in real life. METHODS: Performance with three different CF settings set according to audiometric-based criterion were compared, following a four week familiarisation period with each, in ten adult cochlear implant recipients with residual hearing in both ears...
March 18, 2019: Cochlear Implants International
Timo Bräcker, Stefan Hellmiss, Cornelia Batsoulis, Tina Petzold, Luisa Gabel, Alexander Möltner, Timo Stöver, Robert Mlynski, Thomas Lenarz, Andreas Büchner
OBJECTIVES: The controlled clinical test environment is very different from real-life listening situations, where the presence of additional speakers and variations in background noise signals can affect listening performances. The primary objective of this study is to reduce the gap between clinical results and real-life performances that are reported for many hearing implant users. METHODS: Similar to Part I of this study, hearing performance and sound perception are evaluated using the following tests: (i) the Roving Level Test, (ii) the Just Understanding Speech Test, (iii) the Performance Perceptual Test, (iv) the Visual Analogue Scale to evaluate the perceived listening effort required for a range of background noise levels, and (v) the Hearing Implant Sound Quality questionnaire...
March 17, 2019: Cochlear Implants International
Arneborg Ernst, Regina M Baumgaertel, Angie Diez, Rolf-Dieter Battmer
OBJECTIVES: Cochlear implants (CIs) usually provide severe to profoundly deaf recipients with speech intelligibility in quiet. In difficult listening situations such as background noise however, communication often remains challenging. For unilateral CI recipients with a bilateral hearing loss, speech intelligibility for speech sources on the non-implanted side is further impaired by the head-shadow effect. One possibility to overcome this impairment is the use of Contralateral Routing of Signal (CROS) systems, which capture sounds from the non-implanted side and (wirelessly) transmit them to the implant processor, therefore increasing audibility...
March 1, 2019: Cochlear Implants International
Sumit Kumar Gaur, Sunil Narayan Dutt, Apurva Kumar
It has been seen that 20% of children with deafness have inner ear malformations. Studies demonstrate that Cerebrospinal Fluid (CSF) leakage occurs in 40-50% of patients with inner ear malformations. Differentiating between the various malformations pre-operatively allows the cochlear implant surgeon to plan and prepare for various difficulties associated with the management of such cases. In case of a CSF gusher, a choice of an electrode with a stopper helps in effectively closing off the cochleostomy, thus reducing the chances of post-operative infections...
February 27, 2019: Cochlear Implants International
Zechariah G Franks, Abraham Jacob
OBJECTIVE: To determine how commonly word recognition scores obtained using insert microphones (PB max) overestimate word recognition scores obtained through appropriately fit hearing aids (A-WRS). METHODS: Aided speech recognition tests may not be performed during routine hearing aid fittings; however, they are regularly performed for cochlear implant (CI) candidacy evaluation. Therefore, audiologic data from CI recipients were queried in a retrospective cohort study at a tertiary care center...
February 26, 2019: Cochlear Implants International
Timo Bräcker, Jane Opie, Peter Nopp, Ilona Anderson
OBJECTIVE: Controlled clinical test environments are very different from real-life listening situations in which speaker and background noise level variations can hinder a person's ability to hear and follow conversations. This study was performed to evaluate the ability of people with normal hearing to follow a single speaker in the presence of background noise, and to explore relations between those measures and the listeners' subjective assessments, listening effort, and sound quality judgements...
February 21, 2019: Cochlear Implants International
Arneborg Ernst, Kristina Anton, Martina Brendel, Rolf-Dieter Battmer
OBJECTIVE: To compare the standard T-Mic setting to UltraZoom and StereoZoom in 10 unilateral cochlear implant (CI) users, 10 bimodal device users and 10 bilateral CI users as well as a normal hearing (NH) reference group (n = 10). METHOD: Speech reception thresholds were measured using the Oldenburg sentence test in noise. Speech was presented from the front at 0°, noise was presented from five loudspeakers spaced at ±60°, ±120°, 180° (setup A) or from four loudspeakers in the front hemisphere at ±30°, ±60° and one at 180° (setup B)...
February 13, 2019: Cochlear Implants International
Gauri Mankekar, Moises A Arriaga, Dori Viator, Jerome M Volk
OBJECTIVE: Cochlear implantation is routinely performed all over the world via the post-auricular, facial recess approach. Our case study describes the middle fossa approach for the management of bilateral profound sensorineural hearing loss in a female child with multiple external, middle and inner ear malformations. The middle fossa approach has been reported sporadically and has been used inconsistently in patients with chronic otitis media and inner ear malformations. CASE STUDY: A 3-year-old female child presented with bilateral profound sensorineural hearing loss, bilateral anotia, right cochlear nerve agenesis, right facial paralysis, bilateral mild inner ear dysplasia and an aberrant left facial nerve covering the left round window...
February 11, 2019: Cochlear Implants International
Andrea D Warner-Czyz, Delaney Evans, Lyn Turkstra, Meredith Scheppele, Chen Song, Julia L Evans
Adolescents with severe to profound hearing loss who wear cochlear implants (CIs) experience significantly more peer problems compared to peers with typical hearing (TH). Differences in peer social dynamics may relate to perception not only of message content, but also message intent based on a speaker's emotion from visual (e.g. facial expressions) and auditory (e.g. prosody) cues. Pediatric CI users may experience greater difficulty with auditory emotion recognition due to an impoverished signal representation provided by the device, but the effect of auditory status on visual emotion recognition yields conflicting results...
February 6, 2019: Cochlear Implants International
Chris D Warren, Esti Nel, Paul J Boyd
OBJECTIVES: To assess subjective benefits and objective speech recognition performance following a take-home trial with the new Cochlear™ Nucleus® 7 Sound Processor (SP), in experienced users of compatible cochlear implants from Cochlear Limited. METHODS: A total of 37 adult participants were fitted with the Nucleus 7 SP and used the device for up to one year. Baseline speech recognition was assessed at the initial fitting session, using each participant's own SP, and Client Oriented Scale of Improvement (COSI) goals were identified...
February 2, 2019: Cochlear Implants International
Yang-Soo Yoon, You-Ree Shin, Ji-Min Kim, Allison Coltisor, Young-Myoung Chun
OBJECTIVES: To optimize patient's maps in Electric Acoustic Stimulation (EAS) users based on the degree of post-operative aided hearing thresholds. METHODS: Twenty-one adult EAS patients participated in this study. Patients were subdivided into three groups, based on their unaided hearing threshold: (1) electric complementary (EC, n = 6) patients with ≤30 dB HL at 125-500 Hz with severe to profound hearing loss at higher frequencies who only use electric stimulation, (2) EAS (n = 8) patients with 30-70 dB HL from 125 to 250 Hz and profound hearing loss in high frequencies who use combined EAS, and (3) Marginal-EAS (M-EAS, n = 7) patients with 70-95 dB HL at frequencies ≤250 Hz who use combined EAS...
January 29, 2019: Cochlear Implants International
Hatice Akçakaya, Murat Doğan, Selhan Gürkan, Özge Koçak, Esra Yücel
OBJECTIVES: The purpose of this study was to compare performance in the areas of verbal working memory (VWM), vocabulary skills, and speech intelligibility between children with cochlear implants (CIs) and children with typical development (TD). The correlations between participant variables and the scores of children with CIs in VWM and the measures of language were examined. Also, it was important to identify which variables predict VWM in children with CIs. METHODS: A total of 59 children participated in this study with the study group being comprised of 31 children who had received a CI and the control group being comprised of 28 children with TD...
January 8, 2019: Cochlear Implants International
John Graham
No abstract text is available yet for this article.
May 2019: Cochlear Implants International
Samuel M Cohen, Mario A Svirsky
OBJECTIVE: Examine the relationship between duration of unilateral deafness and speech perception outcomes after cochlear implantation in adults with single-sided deafness. METHODS: A systematic review of PubMed articles containing individual speech perception and duration of deafness data from single-sided deaf adults. Studies were selected for detailed review and duration of deafness and speech perception outcomes were extracted, with speech scores reported as percent correct...
March 2019: Cochlear Implants International
Kasper Sandager Mikkelsen, Lisbeth Tranebjærg, Kristianna Mey
A 10-year-old boy with fluctuating sensorineural hearing loss (SNHL) and biallelic mutations in the SLC26A4 gene and with inner ear anomalies received a cochlear implantation. SLC26A4 mutations are associated with variable degrees of SNHL and enlarged vestibular aqueducts (EVA), identified either as non-syndromic EVA or classic Pendred syndrome; the latter also associated with thyroid dysfunction. The inner ear malformations in this group of patients have been considered a relative contraindication against cochlear implantation because of the potential per- and postoperative complications such as peroperative cerebrospinal fluid leak or postoperative vestibular symptoms...
November 28, 2018: Cochlear Implants International
Wong Kein Low, Jing Ying See, Win Nie Ng, Audra Fong, Sung Hock Chew
Cogan's Syndrome is an autoimmune disorder that can affect the ear, eye and other organs. Although rare, Cogan's Syndrome is particularly relevant to the cochlear implant surgeon because the resulting hearing loss is often bilateral and the majority of cases progresses to profound levels where cochlear implantation may be indicated. There are many issues relating to this condition that concern the cochlear implant surgeon. Its rarity, lack of specific laboratory diagnostic tests and variability in the onset and types of manifestation relating to the ear, eye and other organs often pose diagnostic difficulties...
November 24, 2018: Cochlear Implants International
Matthias Hey, Thomas Wesarg, Alexander Mewes, Silke Helbig, Joachim Hornung, Thomas Lenarz, Robert Briggs, Mathieu Marx, Angel Ramos, Timo Stöver, Bernard Escudé, Chris J James, Antje Aschendorff
OBJECTIVES: To report on electrode array measurements for the Nucleus® CI532 Slim Modiolar Electrode device including: ECAP thresholds, electrode impedances, and psychophysical comfort levels, as well as speech perception results pre- and post-operatively and standardized evaluations of quality of life. METHODS: Forty-four subjects were implanted with the CI532. Electrically evoked compound action potential (ECAP) thresholds and impedances were measured using automatic Neural Response Telemetry intra-operatively, at activation and at six months post implant...
November 22, 2018: Cochlear Implants International
Robert Nash, Sofia Otero, Jeremy Lavy
OBJECTIVES: It is recognised that CT can be used to determine the cochlear duct length (CDL) when selecting an electrode for cochlear implantation. It is the practice of our institution to routinely use MRI as the sole modality of pre-operative imaging in the assessment of children referred for consideration of cochlear implantation. We therefore wanted to determine whether MRI could be reliably used to determine cochlear duct length. METHODS: An analysis of 40 ears that had undergone MRI and CT of the temporal bones was undertaken...
November 22, 2018: Cochlear Implants International
Yazeed Aloqaili, Abdullah S Arafat, Alanoud Almarzoug, Lama S Alalula, Alanoud Hakami, Malak Almalki, Lamya Alhuwaimel
OBJECTIVES: Cochlear implantation (CI) is used for children with severe to profound hearing loss who show little or no improvement using hearing aids. This study explored parental knowledge of their children's CI. METHODS: A cross-sectional study involving the parents of 115 pediatric CI patients was conducted at King Abdullah Specialized Children's Hospital in Riyadh, Saudi Arabia. Parents were interviewed by telephone using a 50-question validated questionnaire...
November 22, 2018: Cochlear Implants International
Victoria Scott-Warren, Anju Bendon, Iain A Bruce, Lise Henderson, Jacques Diacono
Congenital long QT syndrome (cLQTS) is an inherited cardiac ion channelopathy characterized by a long corrected-QT interval on the ECG, associated with a risk of syncope and sudden death as a result of arrhythmias. The archetypal arrhythmia associated with cLQTS is torsade de pointes which may degenerate into ventricular fibrillation. Children with Jervell and Lange-Neilsen syndrome have the combination of cLQTS and congenital sensorineural deafness and may present for cochlear implantation (CI). Sympathetic stimulation and administration of QT-prolonging medications may trigger arrhythmias in children with cLQTS and thus the perioperative period is a time of increased risk of adverse events, with deaths reported in the CI literature...
November 2018: Cochlear Implants International
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