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Cochlear implant

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https://www.readbyqxmd.com/read/28635507/cochlear-implant-effectiveness-in-postlingual-single-sided-deaf-individuals-what-s-the-point
#1
Mareike Finke, Hanna Bönitz, Björn Lyxell, Angelika Illg
OBJECTIVES: By extending the indication criteria for cochlear implants (CI), the population of CI candidates increased in age, as well as range and type of hearing loss. This qualitative study identified factors that contributed to seek CI treatment in single-sided deaf individuals and gained insights how single-sided deafness (SSD) and hearing with a CI affect their lives. DESIGN: An open-ended questionnaire and a standardised inventory (IOI-HA) were used. Qualitative data reflecting the reasons to seek CI treatment and the individual experiences after CI switch-on were collected...
March 5, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28634435/the-clinical-uses-of-electrocochleography
#2
REVIEW
William P Gibson
The clinical uses of electrocochleography are reviewed with some technical notes on the apparatus needed to get clear recordings under different conditions. Electrocochleography can be used to estimate auditory thresholds in difficult to test children and a golf club electrode is described. The same electrode can be used to obtain electrical auditory brainstem responses (EABR). Diagnostic testing in the clinic can be performed with a transtympanic needle electrode, and a suitable disposable monopolar electrode is described...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28634306/representations-of-time-varying-cochlear-implant-stimulation-in-auditory-cortex-of-awake-marmosets-callithrix-jacchus
#3
Luke A Johnson, Charles C Della Santina, Xiaoqin Wang
Electrical stimulation of the auditory periphery organ by cochlear implant (CI) generates highly synchronized inputs to the auditory system. It has long been thought such inputs would lead to highly synchronized neural firing along the ascending auditory pathway. However, neurophysiological studies with hearing animals have shown that the central auditory system progressively converts temporal representations of time-varying sounds to firing rate-based representations. It is not clear whether this coding principle also applies to highly synchronized CI inputs...
June 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28633960/effect-of-stimulus-level-on-the-temporal-response-properties-of-the-auditory-nerve-in-cochlear-implants
#4
Michelle L Hughes, Sarah A Laurello
Electrically evoked compound action potentials (ECAPs) have been used to examine temporal response patterns of the auditory nerve in cochlear implant (CI) recipients. ECAP responses to individual pulses in a pulse train vary across stimulation rates for individual CI users. For very slow rates, auditory neurons have ample time to discharge, recover, and respond to each pulse in the train. As the pulse rate increases, an alternating ECAP-amplitude pattern occurs. As the stimulation rate increases further, the alternating pattern eventually ceases and the overall ECAP amplitudes are diminished, yielding a relatively stochastic state that presumably reflects a combination of adaptation, desynchronization, and facilitation across fibers...
June 13, 2017: Hearing Research
https://www.readbyqxmd.com/read/28631670/-topographic-anatomy-of-the-hook-region-and-its-significance-for-the-choice-of-the-surgical-technique-for-the-cochlear-implantation
#5
Yu K Yanov, V E Kuzovkov, A S Lilenko, I V Kostevich, S B Sugarova, A Sh Amonov
The mode of the introduction of the active electrode of a cochlear implant into the cochlea remains a key issue as far as cochlear implantation is concerned. Especially much attention has recently been given to the relationship between the anatomical features of the basal region of the cochlea (the so-called 'fish hook') and the possibility to approach it. We have undertaken the attempt to optimize the approach to the tympanic canal (scala tympanica) of the cochlea with a view to reducing to a minimum the risk of an injury to the cochlear structures in the course of cochlear implantation...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28631161/the-role-of-eabr-with-intracochlear-test-electrode-in-decision-making-between-cochlear-and-brainstem-implants-preliminary-results
#6
Betul Cicek Cinar, Mehmet Yarali, Gamze Atay, Munir Demir Bajin, Gonca Sennaroglu, Levent Sennaroglu
The objective of the study was to discuss the findings of intraoperative electrically evoked auditory brainstem response (eABR) test results with a recently designed intracochlear test electrode (ITE) in terms of their relation to decisions of cochlear or auditory brainstem implantation. This clinical study was conducted in Hacettepe University, Department of Otolaryngology, Head and Neck Surgery and Department of Audiology. Subjects were selected from inner ear malformation (IEM) database. Eleven subjects with profound sensorineural hearing loss were included in the current study with age range from 1 year 3 months to 4 years 3 months for children with prelingual hearing loss...
June 19, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28630884/evaluation-of-a-high-resolution-patient-specific-model-of-the-electrically-stimulated-cochlea
#7
Ahmet Cakir, Robert T Dwyer, Jack H Noble
Cochlear implants (CIs) are surgically implanted medical devices used to treat individuals with severe-to-profound sensorineural hearing loss. Although these devices have been remarkably successful at restoring audibility, many patients experience poor outcomes. Our group has developed the first image-guided CI programming technique where the electrode positions are found in CT images and used to estimate neural activation patterns, which is unique information that audiologists can use to define patient-specific processor settings...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28629258/implementation-and-preliminary-evaluation-of-c-tone-a-novel-algorithm-to-improve-lexical-tone-recognition-in-mandarin-speaking-cochlear-implant-users
#8
Lichuan Ping, Ningyuan Wang, Guofang Tang, Thomas Lu, Li Yin, Wenhe Tu, Qian-Jie Fu
OBJECTIVES: Because of limited spectral resolution, Mandarin-speaking cochlear implant (CI) users have difficulty perceiving fundamental frequency (F0) cues that are important to lexical tone recognition. To improve Mandarin tone recognition in CI users, we implemented and evaluated a novel real-time algorithm (C-tone) to enhance the amplitude contour, which is strongly correlated with the F0 contour. METHODS: The C-tone algorithm was implemented in clinical processors and evaluated in eight users of the Nurotron NSP-60 CI system...
June 20, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28628917/anatomical-characteristics-of-facial-nerve-and-cochlea-interaction
#9
Nadine Schart-Morén, Sune Larsson, Helge Rask-Andersen, Hao Li
OBJECTIVE: The aim was to study the relationship between the labyrinthine portion (LP) of the facial canal and the cochlea in human inner ear molds and temporal bones using micro-CT and 3D rendering. A reduced cochlea-facial distance may spread electric currents from the cochlear implant to the LP and cause facial nerve stimulation. Influencing factors may be the topographic anatomy and otic capsule properties. METHODS: An archival collection of human temporal bones underwent micro-CT and 3D reconstruction...
June 20, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28625811/intra-operative-radiological-diagnosis-of-a-tip-roll-over-electrode-array-displacement-using-fluoroscopy-when-electrophysiological-testing-is-normal-the-importance-of-both-techniques-in-cochlear-implant-surgery
#10
Octavio Garaycochea, Raquel Manrique-Huarte, Manuel Manrique
No abstract text is available yet for this article.
June 1, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28625417/modeled-auditory-nerve-responses-to-amplitude-modulated-cochlear-implant-stimulation
#11
M J van Gendt, J J Briaire, R K Kalkman, J H M Frijns
Cochlear implants encode speech information by stimulating the auditory nerve with amplitude-modulated pulse trains. A computer model of the auditory nerve's response to electrical stimulation can be used to evaluate different approaches to improving CI patients' perception. In this paper a computationally efficient stochastic and adaptive auditory nerve model was used to investigate full nerve responses to amplitude-modulated electrical pulse trains. The model was validated for nerve responses to AM pulse trains via comparison with animal data...
May 19, 2017: Hearing Research
https://www.readbyqxmd.com/read/28625187/a-comparison-study-of-complications-and-initial-follow-up-costs-of-transcutaneous-and-percutaneous-bone-conduction-devices
#12
J Godbehere, S D Carr, J Moraleda, P Edwards, J Ray
BACKGROUND: The percutaneous osseointegrated bone conduction device can be associated with more soft tissue complications when compared to the magnetic transcutaneous osseointegrated bone conduction device. This study aimed to determine whether fewer soft tissue complications may result in the transcutaneous osseointegrated bone conduction device being a lower cost option in hearing rehabilitation. METHODS: This retrospective case note review included adult patients who underwent implantation with the transcutaneous Cochlear Attract (n = 22) or percutaneous Cochlear DermaLock (n = 25) bone-anchored hearing aids between September 2013 and December 2014...
June 19, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28623039/the-acoustic-characteristics-of-the-voice-in-cochlear-implanted-children-a-longitudinal-study
#13
Yajing Wang, Faya Liang, Jinshan Yang, Xueyuan Zhang, Jiahao Liu, Yiqing Zheng
OBJECTIVE: The purpose of this study was to characterize changes in the voice and vowel articulation of prelingually deaf children after cochlear implantation. METHODS: In this study, the patient group included 30 prelingually deaf children who underwent unilateral cochlear implantation at 4-6 years of age. The control group included normally hearing children of the same age. All deaf children had follow-ups before cochlear implantation and at 1, 3, 6, 12, and 24 months after implantation...
June 13, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28621001/early-vocabulary-development-in-children-with-bilateral-cochlear-implants
#14
Taina Välimaa, Sari Kunnari, Päivi Laukkanen-Nevala, Eila Lonka
BACKGROUND: Children with unilateral cochlear implants (CIs) may have delayed vocabulary development for an extended period after implantation. Bilateral cochlear implantation is reported to be associated with improved sound localization and enhanced speech perception in noise. This study proposed that bilateral implantation might also promote early vocabulary development. Knowledge regarding vocabulary growth and composition in children with bilateral CIs and factors associated with it may lead to improvements in the content of early speech and language intervention and family counselling...
June 16, 2017: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/28618809/binaural-sensitivity-in-children-who-use-bilateral-cochlear-implants
#15
Erica Ehlers, Matthew J Goupell, Yi Zheng, Shelly P Godar, Ruth Y Litovsky
Children who are deaf and receive bilateral cochlear implants (BiCIs) perform better on spatial hearing tasks using bilateral rather than unilateral inputs; however, they underperform relative to normal-hearing (NH) peers. This gap in performance is multi-factorial, including the inability of speech processors to reliably deliver binaural cues. Although much is known regarding binaural sensitivity of adults with BiCIs, less is known about how the development of binaural sensitivity in children with BiCIs compared to NH children...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28618807/the-effect-of-presentation-level-and-stimulation-rate-on-speech-perception-and-modulation-detection-for-cochlear-implant-users
#16
Tim Brochier, Hugh J McDermott, Colette M McKay
In order to improve speech understanding for cochlear implant users, it is important to maximize the transmission of temporal information. The combined effects of stimulation rate and presentation level on temporal information transfer and speech understanding remain unclear. The present study systematically varied presentation level (60, 50, and 40 dBA) and stimulation rate [500 and 2400 pulses per second per electrode (pps)] in order to observe how the effect of rate on speech understanding changes for different presentation levels...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28616773/intracochlear-schwannoma-tumor-removal-via-subtotal-cochleoectomy-and-partial-cochlear-reconstruction-with-preservation-of%C3%A2-semicircular-canal-function
#17
S K Plontke, S Kösling, N Pazaitis, T Rahne
We report about a patient, who in 2005, as a 37-year-old, experienced a sudden, mild to moderate, mid-frequency sensorineural hearing loss in the right ear, along with tinnitus and mild dizziness. MRI of the temporal bone revealed a very small (1 mm) enhancing lesion in the second turn of the right cochlea after injection of contrast medium. Hearing gradually deteriorated, with complete hearing loss in 2015. At this time, an MRI scan showed a lesion completely filling the cochlea.The tumor was removed through a subtotal cochleoectomy...
June 14, 2017: HNO
https://www.readbyqxmd.com/read/28616232/treatment-of-sudden-hearing-loss-using-electro-acupuncture
#18
Ya-Ching Chang, Kwok-Ying Chan
OBJECTIVES: Sudden neurosensory deafness is the second debilitating disease in China. In fact, the current treatment is limited to hearing aids, assistive devices and cochlear implants. However, some patients might not be suitable for surgery or even hearing aids. METHODS: Hereby, we report a pediatric case of sudden sensorineural hearing loss accompanied by otalgia and blocked ear sensation. RESULTS: He firstly failed with conventional treatment but later his hearing symptoms were improved with our electro-acupuncture therapy according to pure tone audiometry findings and clinical responses...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28614845/a-music-related-quality-of-life-measure-to-guide-music-rehabilitation-for-adult-cochlear-implant-users
#19
Giorgos Dritsakis, Rachel M van Besouw, Pádraig Kitterick, Carl A Verschuur
Purpose: A music-related quality of life (MuRQoL) questionnaire was developed for the evaluation of music rehabilitation for adult cochlear implant (CI) users. The present studies were aimed at refinement and validation. Method: Twenty-four experts reviewed the MuRQoL items for face validity. A refined version was completed by 147 adult CI users, and psychometric techniques were used for item selection, assessment of reliability, and definition of the factor structure...
June 15, 2017: American Journal of Audiology
https://www.readbyqxmd.com/read/28614440/nursing-diagnoses-and-interventions-in-children-submitted-to-cochlear-implantation
#20
Patrícia Juliana Santos Pereira, Natália Fernanda Higa de Souza, Raissa Janine de Almeida, Daiane Cabrera Menezes, Gesiane Cristina Bom, Armando Dos Santos Trettene
OBJECTIVE: Identifying the main nursing diagnoses and interventions in children submitted to cochlear implant in the immediate postoperative period. METHOD: A cross-sectional study conducted between February and April 2016, considering nursing history (anamnesis and physical examination) and nursing diagnoses (NANDA - International) with their respective interventions (Nursing Intervention Classification - NIC). Descriptive statistical analysis was used to construct the results...
June 12, 2017: Revista da Escola de Enfermagem da U S P
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