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Cochlear implants

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https://www.readbyqxmd.com/read/29457564/investigating-speech-recognition-and-listening-effort-with-different-device-configurations-in-adult-cochlear-implant-users
#1
Douglas P Sladen, Yingjiu Nie, Katelyn Berg
OBJECTIVES: The purpose of this study was to investigate speech recognition in noise and listening effort among a group of adults with cochlear implants (CIs). Two main research questions were addressed. First, what are the effects of omni versus directional microphone configuration on speech recognition and listening effort for noisy conditions? Second, what is the effect of unilateral versus bimodal or bilateral CI listening on speech recognition and listening effort in noisy conditions? DESIGN: Sixteen adults (mean age 58 years) with CIs participated...
May 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29457563/novel-use-of-the-cochlear-%C3%A2-hybrid-ci24reh-cochlear-implant
#2
Yahya Atiya, Mohamed Razwi Ahmed, Dani Schlesinger-Michelow
Cochlear implantation is becoming more widespread. From its early days to date, huge strides have been made in the technology and surgical technique. However, one challenge remains: implanting malformed or abnormal cochleae. Even more challenging is a cochlea that appears normal at first glance, but is not. We present a case of a child with chondrodysplasia punctata, who had apparently morphologically normal inner ears, but with one major obstacle: the cochlea was smaller than normal in all dimensions. To the best of our knowledge, this is the first case described, and the solution is a novel one as well...
May 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29457562/quality-of-life-outcomes-in-cochlear-implantation-of-children-with-profound-and-multiple-learning-disability
#3
Richard Benjamin Speaker, Jennifer Roberston, Cristina Simoes-Franklin, Fergal Glynn, Peter Walshe, Laura Viani
This study was performed to investigate the effect of cochlear implantation on the Quality of Life (QoL) of children with profound and multiple learning disability (PMLD). This cohort of children has been viewed historically as poor candidates for cochlear implantation as they generally have poor speech and hearing outcomes. The Irish National Cochlear Implant Program's prospectively maintained database was examined for all children implanted from July 1996 to July 2015. All charts of the 381 children implanted during this time were reviewed retrospectively; 16 children met criteria for being PMLD...
May 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29456935/radiological-evaluation-of-cochlear-orientation-and-its-implications-in-cochlear-implantation
#4
Avvaru Satya Kiran, Ajoy Mathew Varghese, Aparna Irodi, Anjali Lepcha, John Mathew, Visalakshi Jeyaseelan
To test whether there are variations in cochlear orientation with respect to age and sex, and its relevance in cochlear implant surgery. Implant otologists rely upon the anatomic landmarks including the facial recess and round window niche and round window membrane for accessibility and placement of electrode array into scala tympani of basal turn of cochlea. Anecdotally, surgeons note variations in cochlear orientation with respect to age. Cochlear orientation studied radiologically by pre-operative CT scan of temporal bone can guide a Surgeon's approach to cochlear implantation...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29455623/rare-case-of-bilateral-aural-atresia-and-cochlear-dysplasia-when-cochlear-implantation-is-not-the-answer
#5
Maja Svrakic
OBJECTIVE AND IMPORTANCE: Reports of patients with concurrent middle and inner ear anomalies are rare. These patients present a surgical challenge for cochlear implantation. The surgical risk must be weighed against the predicted benefit of the patient's hearing outcome and subsequent development of speech and language as well as their quality of life. CLINICAL PRESENTATION: Thirteen-year-old boy presented to the Otology clinic for auditory rehabilitation options...
February 17, 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29453491/does-hearing-aid-use-affect-audiovisual-integration-in-mild-hearing-impairment
#6
Anja Gieseler, Maike A S Tahden, Christiane M Thiel, Hans Colonius
There is converging evidence for altered audiovisual integration abilities in hearing-impaired individuals and those with profound hearing loss who are provided with cochlear implants, compared to normal-hearing adults. Still, little is known on the effects of hearing aid use on audiovisual integration in mild hearing loss, although this constitutes one of the most prevalent conditions in the elderly and, yet, often remains untreated in its early stages. This study investigated differences in the strength of audiovisual integration between elderly hearing aid users and those with the same degree of mild hearing loss who were not using hearing aids, the non-users, by measuring their susceptibility to the sound-induced flash illusion...
February 16, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29452830/usefulness-of-reconstructed-3d-images-for-cochlear-implantation-in-a-case-with-a-facial-nerve-anomaly
#7
Kenichi Nakamura, Mari Shimada Dias, Toru Sasaki, Hisashi Sugimoto, Miyako Hatano, Makoto Ito
Facial nerve anomalies are a potential problem in patients with cochleovestibular malformations. A case of cochlear implant (CI) surgery in the presence of intra-temporalbone facial nerve bifurcation is presented. During the first surgery, the facial nerve bifurcation obscured the promontory and round window. It was difficult to perform cochleostomy because of the lack of landmarks of the basal turn of the cochlea, and the first surgical attempt at cochleostomy was abandoned. A repeat CT scan was performed after the first surgery with reconstructed 3D images of the temporal bone and the cochlea, and then the cochlea was successfully opened at revision surgery...
February 14, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29451359/assessment-of-narrative-writing-by-persian-speaking-students-with-hearing-impairments
#8
Peyman Zamani, Zahra Soleymani, Seyedeh Maryam Mousavi, Negar Akbari
OBJECTIVE: Previous studies have highlighted that narrative skill is critical to the development of the literacy skills by children. Children with cochlear implants (CI) and hearing-aids (HA) may have problems in narrative development compared to peers with healthy hearing (HH). There is no exact data about the narrative writing ability of Persian-speaking students who are hearing-impaired. The current study was undertaken to compare the microstructure and macrostructure scores for narrative writing of Persian-speaking students who are hearing-impaired and peers with HH...
February 16, 2018: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29451107/bilaterally-combined-electric-and-acoustic-hearing-in-mandarin-speaking-listeners-the-population-with-poor-residual-hearing
#9
Duo-Duo Tao, Ji-Sheng Liu, Zhen-Dong Yang, Blake S Wilson, Ning Zhou
The hearing loss criterion for cochlear implant candidacy in mainland China is extremely stringent (bilateral severe to profound hearing loss), resulting in few patients with substantial residual hearing in the nonimplanted ear. The main objective of the current study was to examine the benefit of bimodal hearing in typical Mandarin-speaking implant users who have poorer residual hearing in the nonimplanted ear relative to those used in the English-speaking studies. Seventeen Mandarin-speaking bimodal users with pure-tone averages of ∼80 dB HL participated in the study...
January 2018: Trends in Hearing
https://www.readbyqxmd.com/read/29450488/spatial-release-from-masking-in-adults-with-bilateral-cochlear-implants-effects-of-distracter-azimuth-and-microphone-location
#10
Timothy J Davis, René H Gifford
Purpose: The primary purpose of this study was to derive spatial release from masking (SRM) performance-azimuth functions for bilateral cochlear implant (CI) users to provide a thorough description of SRM as a function of target/distracter spatial configuration. The secondary purpose of this study was to investigate the effect of the microphone location for SRM in a within-subject study design. Method: Speech recognition was measured in 12 adults with bilateral CIs for 11 spatial separations ranging from -90° to +90° in 20° steps using an adaptive block design...
February 14, 2018: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/29447894/cochlear-implantation-in-pediatric-patients-with-cockayne-syndrome
#11
Renae D Van Wyhe, Claudia V Emery, Robert A Williamson
Cockayne Syndrome (CS) is a rare, autosomal recessive disorder characterized by a spectrum of phenotypic abnormalities, including progressive sensorineural hearing loss (SNHL) that involves both peripheral and central components. To date, a single series of CS patients undergoing cochlear implant (CI) placement has been reported; this study reports on additional previously unreported pediatric CI recipients. Subjective benefits were noted early after activation in both patients, and speech perception scores improved over time as well, varying from 42 to 70% (versus 0-12% previously)...
March 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29447820/how-does-a-bilingual-environment-affect-the-results-in-children-with-cochlear-implants-compared-to-monolingual-matched-children-an-italian-follow-up-study
#12
Francesca Forli, Giada Giuntini, Annalisa Ciabotti, Luca Bruschini, Ulrika Löfkvist, Stefano Berrettini
OBJECTIVES: To compare the results after cochlear implantation achieved by monolingual and bilingual deaf children implanted at our Institution, with the aim of understanding if there are any differences between the two groups and if there is a correlation between the outcomes and some patients' variables. METHODS: The study group was composed by 14 bilingual deaf children and the control group by the same number of monolingual children implanted at our Institution...
February 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29447816/cochlear-implant-symmetry-via-template
#13
REVIEW
A J Hallwachs, J E Weinstein, B K Reilly
Current trends in bilateral cochlear implantation (CI) favor a minimally invasive subperiosteal pocket technique. Symmetric receiver-stimulator (R/S) placement is an important goal for bilateral CI, especially with regard to patient satisfaction. In this article, we describe a method easily adopted to achieve optimal symmetry. Upon reviewing the Senior Author's 11 bilateral CI cases using the direct subperiosteal pocket technique with the proposed "mirror template," we found improved symmetry, which translated into high patient and family satisfaction regarding the aesthetics of the symmetric R/S placement...
February 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29447813/long-term-outcomes-of-universiti-kebangsaan-malaysia-cochlear-implant-program-among-pediatric-implantees
#14
Bee-See Goh, Noraziana Fadzilah, Asma Abdullah, Basyariatul Fathi Othman, Cila Umat
OBJECTIVES: Cochlear implant (CI) greatly enhances auditory performance as compared to hearing aids and has dramatically affected the educational and communication outcomes for profoundly deaf children. Universiti Kebangsaan Malaysia (UKM) pioneered CI program in 1995 in the South East Asia. We would like to report the long-term outcomes of UKM paediatric cochlear implantation in terms of: the proportion of children who were implanted and still using the device, the children's modes of communication, their educational placements, and their functional auditory/oral performance...
February 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29447794/plasticity-after-pediatric-cochlear-implantation-implication-from-changes-in-peripheral-plasma-level-of-bdnf-and-auditory-nerve-responses
#15
Razieh Alemi, Masoud Motassadi Zarandy, Mohammad Taghi Joghataei, Ali Eftekharian, Mohammad Reza Zarrindast, Nasim Vousooghi
INTRODUCTION: Sensory neural hearing loss could lead to some structural and physiological changes in the auditory pathways, such as alteration in the expression of neurotrophins. These factors, especially Brain-Derived Neurotrophic Factor (BDNF), play an important role in synaptic functions and experience-related plasticity. Restoring cochlear function after hearing loss is possible through cochlear implantation (CI). Evaluation of the blood concentration changes of neurotrophins as prerequisites of plasticity could help scientists to determine the prognosis of CI as in the candidacy procedure or enhancing prosthesis function by adding the exact needed amount of BDNF to the electrode array...
February 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29445111/fluvastatin-protects-cochleae-from-damage-by-high-level-noise
#16
Claus-Peter Richter, Hunter Young, Sonja V Richter, Virginia Smith-Bronstein, Stuart R Stock, Xianghui Xiao, Carmen Soriano, Donna S Whitlon
Exposure to noise and ototoxic drugs are responsible for much of the debilitating hearing loss experienced by about 350 million people worldwide. Beyond hearing aids and cochlear implants, there have been no other FDA approved drug interventions established in the clinic that would either protect or reverse the effects of hearing loss. Using Auditory Brainstem Responses (ABR) in a guinea pig model, we demonstrate that fluvastatin, an inhibitor of HMG-CoA reductase, the rate-limiting enzyme of the mevalonate pathway, protects against loss of cochlear function initiated by high intensity noise...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29441835/current-profile-of-adults-presenting-for-preoperative-cochlear-implant-evaluation
#17
Jourdan T Holder, Susan M Reynolds, Linsey W Sunderhaus, René H Gifford
Considerable advancements in cochlear implant technology (e.g., electric acoustic stimulation) and assessment materials have yielded expanded criteria. Despite this, it is unclear whether individuals with better audiometric thresholds and speech understanding are being referred for cochlear implant workup and pursuing cochlear implantation. The purpose of this study was to characterize the mean auditory and demographic profile of adults presenting for preoperative cochlear implant workup. Data were collected prospectively for all adult preoperative workups at Vanderbilt from 2013 to 2015...
January 2018: Trends in Hearing
https://www.readbyqxmd.com/read/29434534/assessment-of-cochlear-function-during-cochlear-implantation-by-extra-and-intracochlear-electrocochleography
#18
Adrian Dalbert, Flurin Pfiffner, Marco Hoesli, Kanthaiah Koka, Dorothe Veraguth, Christof Roosli, Alexander Huber
Objective: The aims of this study were: (1) To investigate the correlation between electrophysiological changes during cochlear implantation and postoperative hearing loss, and (2) to detect the time points that electrophysiological changes occur during cochlear implantation. Material and Methods: Extra- and intracochlear electrocochleography (ECoG) were used to detect electrophysiological changes during cochlear implantation. Extracochlear ECoG recordings were conducted through a needle electrode placed on the promontory; for intracochlear ECoG recordings, the most apical contact of the cochlear implant (CI) electrode itself was used as the recording electrode...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29433516/a-technical-review-and-evaluation-of-implantable-sensors-for-hearing-devices
#19
REVIEW
Diego Calero, Stephan Paul, André Gesing, Fabio Alves, Júlio A Cordioli
Most commercially available cochlear implants and hearing aids use microphones as sensors for capturing the external sound field. These microphones are in general located in an external element, which is also responsible for processing the sound signal. However, the presence of the external element is the cause of several problems such as discomfort, impossibility of being used during physical activities and sleeping, and social stigma. These limitations have driven studies with the goal of developing totally implantable hearing devices, and the design of an implantable sensor has been one of the main challenges to be overcome...
February 13, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29432882/congenital-deafness-reduces-but-does-not-eliminate-auditory-responsiveness-in-lateral-suprasylvian-visual-cortex-of-cats
#20
Rüdiger Land, Jan-Ole Radecke, Andrej Kral
Congenital deafness not only affects the development of the auditory cortex, but also the interrelation between the visual and auditory system. For example, congenital deafness leads to visual modulation of the deaf auditory cortex in the form of cross-modal plasticity. Here we asked, whether congenital deafness additionally affects auditory modulation in the visual cortex. We demonstrate that auditory activity, which is normally present in the suprasylvian visual areas in normal hearing cats, can also be elicited by electrical activation of the auditory system with cochlear implants...
February 9, 2018: Neuroscience
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