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Cochlear implant

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https://www.readbyqxmd.com/read/28929071/an-evaluation-of-the-surgical-trauma-to-intracochlear-structures-after-insertion-of-cochlear-implant-electrode-arrays-a-comparison-by-round-window-and-antero-inferior-cochleostomy-techniques
#1
Kapil Sikka, Arvind Kairo, Chirom Amit Singh, T S Roy, Sanjeev Lalwani, Rakesh Kumar, Alok Thakar, Suresh C Sharma
To evaluate the extent of intracochlear damage by histologic assessment of cadaveric temporal bones after insertion of cochlear implants by: round window approach and cochleostomy approach. Cochlear implantation was performed by transmastoid facial recess approach in 10 human cadaveric temporal bones. In 5 temporal bones, electrode insertion was acheieved by round window approach and in the remaining 5 bones, by cochleostomy approach. The bones were fixed, decalcified, sectioned and studied histologically. Grading of insertion trauma was assessed...
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28929065/the-use-of-lexical-neighborhood-test-lnt-in-the-assessment-of-speech-recognition-performance-of-cochlear-implantees-with-normal-and-malformed-cochlea
#2
Anjali R Kant, Arun A Banik
The present study aims to use the model-based test Lexical Neighborhood Test (LNT), to assess speech recognition performance in early and late implanted hearing impaired children with normal and malformed cochlea. The LNT was administered to 46 children with congenital (prelingual) bilateral severe-profound sensorineural hearing loss, using Nucleus 24 cochlear implant. The children were grouped into Group 1-(early implantees with normal cochlea-EI); n = 15, 31/2-61/2 years of age; mean age at implantation-3½ years...
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28925991/a-multiscale-imaging-and-modelling-dataset-of-the-human-inner-ear
#3
Nicolas Gerber, Mauricio Reyes, Livia Barazzetti, Hans Martin Kjer, Sergio Vera, Martin Stauber, Pavel Mistrik, Mario Ceresa, Nerea Mangado, Wilhelm Wimmer, Thomas Stark, Rasmus R Paulsen, Stefan Weber, Marco Caversaccio, Miguel A González Ballester
Understanding the human inner ear anatomy and its internal structures is paramount to advance hearing implant technology. While the emergence of imaging devices allowed researchers to improve understanding of intracochlear structures, the difficulties to collect appropriate data has resulted in studies conducted with few samples. To assist the cochlear research community, a large collection of human temporal bone images is being made available. This data descriptor, therefore, describes a rich set of image volumes acquired using cone beam computed tomography and micro-CT modalities, accompanied by manual delineations of the cochlea and sub-compartments, a statistical shape model encoding its anatomical variability, and data for electrode insertion and electrical simulations...
September 19, 2017: Scientific Data
https://www.readbyqxmd.com/read/28925814/evaluation-of-timely-pediatric-cochlear-implant-care-throughout-europe-is-european-cochlear-implantation-care-according-to-guidelines
#4
Hanneke Bruijnzeel, Aren Bezdjian, Anke Lesinski-Schiedat, Angelika Illg, Konstance Tzifa, Luisa Monteiro, Antonio Della Volpe, Wilko Grolman, Vedat Topsakal
OBJECTIVES: International guidelines indicate that children with profound hearing loss should receive a cochlear implant (CI) soon after diagnosis in order to optimize speech and language rehabilitation. Although prompt rehabilitation is encouraged by current guidelines, delays in cochlear implantation are still present. This study investigated whether European countries establish timely pediatric CI care based on epidemiological, commercial, and clinical data. METHODS: An estimation of the number of pediatric CI candidates in European countries was performed and compared to epidemiological (Euro-CIU), commercial (Cochlear(®)), and clinical (institutional) age-at-implantation data...
September 19, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28922984/cortical-auditory-evoked-potential-caep-and-behavioural-measures-of-auditory-function-in-a-child-with-a-single-sided-deafness
#5
Oscar M Cañete, Suzanne C Purdy, Michel Neeff, Colin R S Brown, Peter R Thorne
OBJECTIVES: To study the changes in behavioural and cortical responses over time in a child with single-sided deafness fitted with a cochlear implant (CI). METHODS: Cortical auditory evoked potentials (CAEPs) in noise (+5 dB signal-to-noise ratio) were recorded and auditory skills were assessed using tests of sound localization, spatial speech perception in noise, and self-ratings of auditory abilities (Listening inventory for education, LIFE and Speech, spatial and qualities of hearing questionnaire, SSQ parental version)...
September 19, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28918053/ush2a-gene-editing-using-the-crispr-system
#6
Carla Fuster-García, Gema García-García, Elisa González-Romero, Teresa Jaijo, María D Sequedo, Carmen Ayuso, Rafael P Vázquez-Manrique, José M Millán, Elena Aller
Usher syndrome (USH) is a rare autosomal recessive disease and the most common inherited form of combined visual and hearing impairment. Up to 13 genes are associated with this disorder, with USH2A being the most prevalent, due partially to the recurrence rate of the c.2299delG mutation. Excluding hearing aids or cochlear implants for hearing impairment, there are no medical solutions available to treat USH patients. The repair of specific mutations by gene editing is, therefore, an interesting strategy that can be explored using the CRISPR/Cas9 system...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28917133/waiting-for-lexical-access-cochlear-implants-or-severely-degraded-input-lead-listeners-to-process-speech-less-incrementally
#7
Bob McMurray, Ashley Farris-Trimble, Hannah Rigler
Spoken language unfolds over time. Consequently, there are brief periods of ambiguity, when incomplete input can match many possible words. Typical listeners solve this problem by immediately activating multiple candidates which compete for recognition. In two experiments using the visual world paradigm, we examined real-time lexical competition in prelingually deaf cochlear implant (CI) users, and normal hearing (NH) adults listening to severely degraded speech. In Experiment 1, adolescent CI users and NH controls matched spoken words to arrays of pictures including pictures of the target word and phonological competitors...
September 13, 2017: Cognition
https://www.readbyqxmd.com/read/28906240/listening-effort-measured-in-adults-with-normal-hearing-and-cochlear-implants
#8
Ann E Perreau, Yu-Hsiang Wu, Bailey Tatge, Diana Irwin, Daniel Corts
BACKGROUND: Studies have examined listening effort in individuals with hearing loss to determine the extent of the impairment. Regarding cochlear implants (CIs), results suggest that listening effort is improved using bilateral CIs compared to unilateral CIs. Few studies have investigated listening effort and outcomes related to the hybrid CI. PURPOSE: Here, we compared listening effort across three CI groups, and to a normal-hearing control group. The impact of listener traits, that is, age, age at onset of hearing loss, duration of CI use, and working memory capacity, were examined relative to listening effort...
September 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28906160/tone-production-and-perception-and-intelligibility-of-produced-speech-in-mandarin-speaking-cochlear-implanted-children
#9
Yi-Lu Li, Yi-Hui Lin, Hui-Mei Yang, Yeou-Jiunn Chen, Jiunn-Liang Wu
OBJECTIVE: This study explored tone production, tone perception and intelligibility of produced speech in Mandarin-speaking prelingually deaf children with at least 5 years of cochlear implant (CI) experience. Another focus was on the predictive value of tone perception and tone production as they relate to speech intelligibility. DESIGN: Cross-sectional research. STUDY SAMPLE: Thirty-three prelingually deafened children aged over eight years with over five years of experience with CI underwent tests for tone perception, tone production, and the Speech Intelligibility Rating (SIR)...
September 14, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28902805/the-effect-of-hearing-aids-and-cochlear-implants-on-balance-during-gait
#10
Tyler S Weaver, Corey S Shayman, Timothy E Hullar
HYPOTHESIS: Auditory input in people with hearing impairment will improve balance while walking. BACKGROUND: Auditory input is increasingly recognized as an additional input for balance. Several studies have found auditory cues to improve static balance measured on a sway platform. The effect of audition on gait, a dynamic task also linked to fall risk, has not been fully examined. If a positive effect were shown between audition and balance, it would further indicate that improving hearing could also improve balance...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28902803/cochlear-implantation-in-otosclerosis-surgical-and-auditory-outcomes-with-a-brief-on-facial-nerve-stimulation
#11
Ashish Vashishth, Andrea Fulcheri, Gianluca Rossi, Sampath Chandra Prasad, Antonio Caruso, Mario Sanna
OBJECTIVES: 1) To review the surgical and auditory outcomes in patients of cochlear implantation in otosclerosis. 2) To review complications and postimplantation facial nerve stimulation (FNS). 3) To compare the auditory outcomes between patients displaying cochlear ossification to the nonossified ones. STUDY DESIGN: Retrospective study. SETTING: Quaternary Otology and Skull base surgery center. SUBJECTS AND METHODS: Charts of 36 patients (38 ears) with otosclerosis undergoing cochlear implantation were reviewed from the cochlear implant database...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28902802/audiological-outcomes-and-map-characteristics-in-children-with-perimodiolar-and-slim-straight-array-cochlear-implants-in-opposite-ears
#12
Lisa R Park, Holly F B Teagle, Kevin D Brown, Erika B Gagnon, Jennifer S Woodard, Craig A Buchman
OBJECTIVE: To identify differences in outcomes and map characteristics in pediatric bilateral cochlear implants with modiolar conforming and lateral wall arrays in opposite ears. STUDY DESIGN: Retrospective case series. SETTING: Tertiary care pediatric referral center. PATIENTS: Fourteen children who received a perimodiolar array in one ear and a slim straight array in the opposite ear in sequential surgeries. INTERVENTIONS: None...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28901574/using-a-multi-feature-paradigm-to-measure-mismatch-responses-to-minimal-sound-contrasts-in-children-with-cochlear-implants-and-hearing-aids
#13
Inger Uhlén, Elisabet Engström, Petter Kallioinen, Cecilia Nakeva von Mentzer, Björn Lyxell, Birgitta Sahlén, Magnus Lindgren, Marianne Ors
Our aim was to explore whether a multi-feature paradigm (Optimum-1) for eliciting mismatch negativity (MMN) would objectively capture difficulties in perceiving small sound contrasts in children with hearing impairment (HI) listening through their hearing aids (HAs) and/or cochlear implants (CIs). Children aged 5-7 years with HAs, CIs and children with normal hearing (NH) were tested in a free-field setting using a multi-feature paradigm with deviations in pitch, intensity, gap, duration, and location. There were significant mismatch responses across all subjects that were positive (p-MMR) for the gap and pitch deviants (F(1,43) = 5...
October 2017: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/28900873/numerical-analysis-of-intracochlear-mechanical-auditory-stimulation-using-piezoelectric-bending-actuators
#14
Daniel Schurzig, Sebastian Schwarzendahl, Jörg Wallaschek, Wouter J van Drunen, Thomas S Rau, Thomas Lenarz, Omid Majdani
Cochlear implantation can restore a certain degree of auditory impression of patients suffering from profound hearing loss or deafness. Furthermore, studies have shown that in case of residual hearing, patients benefit from the use of a hearing aid in addition to the cochlear implant. The presented studies aim at the improvement of this electromechanical stimulation (EMS) approach by substituting the external hearing aid by an internal stimulus provided by miniaturized piezoelectric actuators. Finite element analyses are performed in order to derive fundamental guidelines for the actuator layout aiming at maximal mechanical stimuli...
September 13, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28899200/spoken-language-and-everyday-functioning-in-5-year-old-children-using-hearing-aids-or-cochlear-implants
#15
Linda Cupples, Teresa Yc Ching, Laura Button, Mark Seeto, Vicky Zhang, Jessica Whitfield, Miriam Gunnourie, Louise Martin, Vivienne Marnane
OBJECTIVE: This study investigated the factors influencing 5-year language, speech and everyday functioning of children with congenital hearing loss. DESIGN: Standardised tests including PLS-4, PPVT-4 and DEAP were directly administered to children. Parent reports on language (CDI) and everyday functioning (PEACH) were collected. Regression analyses were conducted to examine the influence of a range of demographic variables on outcomes. STUDY SAMPLE: Participants were 339 children enrolled in the Longitudinal Outcomes of Children with Hearing Impairment (LOCHI) study...
September 12, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28895463/impact-of-primary-language-and-insurance-on-pediatric-hearing-health-care-in-a-multidisciplinary-clinic
#16
Brooke M Su, Jason S Park, Dylan K Chan
Objective This study aims to describe the effects of primary language and insurance status on care utilization among deaf or hard-of-hearing children under active otolaryngologic and audiologic care. Study Design Cross-sectional analysis. Setting Multidisciplinary hearing loss clinic at a tertiary center. Subjects and Methods Demographics, hearing loss data, and validated survey responses were collected from 206 patients aged 0 to 19 years. Two-sided t tests and χ(2) tests were used to obtain descriptive statistics and hypothesis testing...
September 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28894831/assessment-and-improvement-of-sound-quality-in-cochlear-implant-users
#17
REVIEW
Meredith T Caldwell, Nicole T Jiam, Charles J Limb
OBJECTIVES: Cochlear implants (CIs) have successfully provided speech perception to individuals with sensorineural hearing loss. Recent research has focused on more challenging acoustic stimuli such as music and voice emotion. The purpose of this review is to evaluate and describe sound quality in CI users with the purposes of summarizing novel findings and crucial information about how CI users experience complex sounds. DATA SOURCES: Here we review the existing literature on PubMed and Scopus to present what is known about perceptual sound quality in CI users, discuss existing measures of sound quality, explore how sound quality may be effectively studied, and examine potential strategies of improving sound quality in the CI population...
June 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/28894813/the-importance-of-electrode-location-in-cochlear-implantation
#18
REVIEW
Brendan P O'Connell, Jacob B Hunter, George B Wanna
OBJECTIVES: As indications for cochlear implantation have expanded to include patients with more residual hearing, increasing emphasis has been placed on minimally traumatic electrode insertion. Histopathologic evaluation remains the gold standard for evaluation of cochlear trauma, but advances in imaging techniques have allowed clinicians to determine scalar electrode location in vivo. This review will examine the relationship between scalar location of electrode arrays and audiologic outcomes...
December 2016: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/28892270/biomimetic-artificial-basilar-membranes-for-next-generation-cochlear-implants
#19
REVIEW
Jongmoon Jang, Jeong Hun Jang, Hongsoo Choi
Patients with sensorineural hearing loss can recover their hearing using a cochlear implant (CI). However, there is a need to develop next-generation CIs to overcome the limitations of conventional CIs caused by extracorporeal devices. Recently, artificial basilar membranes (ABMs) are actively studied for next-generation CIs. The ABM is an acoustic transducer that mimics the mechanical frequency selectivity of the BM and acoustic-to-electrical energy conversion of hair cells. This paper presents recent progress in biomimetic ABMs...
September 11, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28890230/is-there-a-best-side-for-cochlear-implants-in-post-lingual-patients
#20
Maria Stella Arantes do Amaral, Thiago A Damico, Alina S Gonçales, Ana C M B Reis, Myriam de Lima Isaac, Eduardo T Massuda, Miguel Angelo Hyppolito
INTRODUCTION: Cochlear Implant is a sensory prosthesis capable of restoring hearing in patients with severe or profound bilateral sensorineural hearing loss. OBJECTIVE: To evaluate if there is a better side to be implanted in post-lingual patients. METHODS: Retrospective longitudinal study. Participants were 40 subjects, of both sex, mean age of 47 years, with post-lingual hearing loss, users of unilateral cochlear implant for more than 12 months and less than 24 months, with asymmetric auditor reserve between the ears (difference of 10dBNA, In at least one of the frequencies with a response, between the ears), divided into two groups...
July 29, 2017: Brazilian Journal of Otorhinolaryngology
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