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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...
November 28, 2018: 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
Robert Nash, Azhar Shaida, Shakeel Saeed, Sherif Khalil, Jeremy Lavy
INTRODUCTION: We have observed a small number of patients with cochlear implants who have a tendency to develop recurrent seromas overlying the implant package. METHODS: Five patients with a current or previous history of recurrent seromas presenting for review over a three-month period were identified. A retrospective review of their case notes was undertaken. RESULTS: All patients identified were children, with a mean age at first seroma of 5...
October 31, 2018: Cochlear Implants International
S M Schaefer, M de Kruijf, L Henderson, A Metryka, M O'Driscoll, I A Bruce
OBJECTIVES: Increasingly, children are considered for a unilateral cochlear implant (CI), even if the contralateral ear falls outside current audiological guidelines, especially if they are not considered to be reaching their educational potential. Here we present the outcomes of CI in children with potentially useable hearing in the contralateral ear. METHODS: A retrospective case note review was performed for a total of 57 patients. Primary outcome was speech and language (SaL) development, as measured by the Manchester Speech and Language Development Scale (MSLDS) and SaL age equivalent...
October 23, 2018: Cochlear Implants International
F Christov, M B Gluth, S J Lahti, S Ludwig, S Hans, L C Holtmann, S Lang, D Arweiler-Harbeck
INTRODUCTION: In patients undergoing cochlear implantation, intraoperative measures of impedance and electrically evoked compound action potentials (ECAPs) are used to confirm device integrity and electrode array position. However, these electrophysiological parameters have been shown to decrease over time, with a small decrement observable as early as 24 h post implantation and becoming more apparent after 6 months. Whether the intraoperatively measured impedances and ECAPs recorded immediately after electrode insertion versus later in the operation or in an open versus closed operative site vary has not been documented...
October 23, 2018: Cochlear Implants International
Phoebe Anderson, Simone Schaefer, Lise Henderson, Iain A Bruce
OBJECTIVE: Brown-Vialetto-Van Laere syndrome (BVVL) is a rare neurodegenerative disorder associated with auditory neuropathy (AN). The decision process for CI in AN is evolving with increasing evidence of efficacy. We evaluated the benefit of CI in children with BVVL syndrome. METHODS: A retrospective study reviewed the pre- and post-operative hearing outcomes of three patients with BVVL who presented for CI. A fourth patient with BVVL who was not suitable for CI is also discussed...
October 18, 2018: Cochlear Implants International
Farheen Naz Anis, Cila Umat, Kartini Ahmad, Badrulzaman Abdul Hamid
OBJECTIVE: This study examined the patterns of recognition of Arabic consonants, via information transmission analysis for phonological features, in a group of Malay children with normal hearing (NH) and cochlear implants (CI). METHOD: A total of 336 and 616 acoustic tokens were collected from six CI and 11 NH Malay children, respectively. The groups were matched for hearing age and duration of exposure to Arabic sounds. All the 28 Arabic consonants in the form of consonant-vowel /a/ were presented randomly twice via a loudspeaker at approximately 65 dB SPL...
October 6, 2018: Cochlear Implants International
Tanmaya Kataria, Mohnish Grover, Shitanshu Sharma, Sunil Samdani, Man Prakash Sharma
INTRODUCTION: Beta-thalassemias are a group of hereditary blood disorders characterized by anomalies in the synthesis of the beta chains of hemoglobin. Iron overload occurs in thalassemia, with blood transfusion therapy being the major cause. Deferoxamine continues to be the mainstay of therapy to remove excess iron in patients requiring long-term transfusions. One of the most important complications of deferoxamine therapy is neurosensory toxicity, including sensorineural hearing loss (SNHL)...
September 20, 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
Hannes Petersen, Peter Walshe, Fergal Glynn, Rosemary McMahon, Conall Fitzgerald, Jyoti Thapa, Cristina Simoes-Franklin, Laura Viani
OBJECTIVES: Cochlear implantation (CI) is considered an effective and relatively safe procedure for patients with severe-profound hearing loss. However, severe complications are reported in several studies. The purpose of this study was to report the frequency and management of major complications following CI surgery at the National CI Programme (NCIP) in Ireland. METHODS: Major complications were defined according to the classification of Hansen et al. 2010. The medical records of 1017 patients undergoing CI between 1995 and 2016 were analyzed retrospectively for major complications...
November 2018: Cochlear Implants International
William G Kronenberger, Shirley C Henning, Allison M Ditmars, David B Pisoni
OBJECTIVE: Verbal working memory (WM) is more strongly correlated with spoken language skills in prelingually deaf, early-implanted cochlear implant (CI) users than in normal-hearing (NH) peers, suggesting that CI users access WM in order to support and compensate for their slower, more effortful spoken language processing. This pilot study tested the feasibility and validity of a dual-task method for establishing the causal role of WM in basic language processing (lexical access speed) in samples of 9 CI users (ages 8-26 years) and 9 NH peers...
November 2018: Cochlear Implants International
Annes J Claes, Paul Van de Heyning, Annick Gilles, Vincent Van Rompaey, Griet Mertens
OBJECTIVES: To critically assess the current status of the literature on cognitive outcomes after cochlear implantation in older adults. METHODS: Studies were identified by searching MEDLINE (PubMed) and Cochrane Library, and checking reference lists of relevant articles. No restrictions were imposed regarding language, publication date, or publication status. Eligibility criteria were as follows: (1) the study sample included older adults aged 50 or over with severe to profound bilateral hearing loss, (2) the participants received a multi-electrode cochlear implant, and (3) a cognitive test was performed before and after implantation...
September 2018: Cochlear Implants International
Catherine F Killan, Sally Harman, Edward C Killan
BACKGROUND: Sound localization is a valuable skill that children can develop to some extent via bilateral cochlear implants (biCIs). However, little is known regarding the change that can be expected in sound-source localization accuracy (SLA) pre- and post-biCI for children with bilateral, severe-to-profound hearing impairment who spent their early years listening via bilateral hearing aids (biHAs). This study therefore aimed to prospectively assess SLA in a group of children before, and at one year after, receiving simultaneous biCIs...
September 2018: Cochlear Implants International
Griet Mertens, Vincent Van Rompaey, Paul Van de Heyning
BACKGROUND: A suggested solution to suppress tinnitus is to restore the normal sensory input. This is based on the auditory deprivation hypothesis. It is known that hearing aids can provide sufficient activation of the auditory nervous system and reduce tinnitus in subjects with mild to moderate hearing loss and that cochlear implantation can reduce tinnitus in subjects with severe to profound hearing loss. This applies to subjects with single-sided deafness (SSD) or bilateral hearing loss...
September 2018: Cochlear Implants International
Thomas G Landry, Guy Earle, Jeremy A Brown, Manohar L Bance
OBJECTIVES: This study aimed to determine the feasibility of combining high-frequency ultrasound imaging, automated insertion, and force sensing to yield more information about cochlear implant insertion dynamics. METHODS: An apparatus was developed combining these aspects along with software to control implant and imaging probe positions. Decalcified unfixed human cochleas were implanted at various speeds, insertion sites, and implant models while imaging near the implant tip throughout insertion and recording force data from the cochlea mounting stage...
September 2018: Cochlear Implants International
Daniel Schurzig, Max Eike Timm, G Jakob Lexow, Omid Majdani, Thomas Lenarz, Thomas S Rau
OBJECTIVE: Within the field of cochlear implantation (CIs), the role of utilizing patient-specific cochlear anatomy for choosing the optimal implant electrode is becoming increasingly important. Unfortunately, performing detailed anatomical measurements of a cochlea using clinical imaging data is rather time consuming and hence difficult to implement into the clinical routine. In order to accelerate clinical cochlear anatomy evaluations, previously developed mathematical models can be adjusted to the patient-specific anatomy by measuring just a few overall cochlear dimensions...
September 2018: Cochlear Implants International
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