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Cochlear implants

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https://www.readbyqxmd.com/read/29683995/cochlear-implantation-in-adults-with-asymmetric-hearing-loss-speech-recognition-in-quiet-and-in-noise-and-health-related-quality-of-life
#1
Douglas P Sladen, Matthew L Carlson, Brittany P Dowling, Amy P Olund, Melissa D DeJong, Alyce Breneman, Sara Hollander, Charles W Beatty, Brian A Neff, Colin L Driscoll
OBJECTIVE: To examine the possible speech recognition and health related quality of life (HRQoL) benefits of cochlear implantation among adults with asymmetric sensorineural hearing loss. STUDY DESIGN: Retrospective chart review, single-subject design. METHODS: A total of 45 adult cochlear implant recipients with asymmetric sensorineural hearing loss where performance for the best-aided condition exceeded 60% correct open set sentence recognition in quiet, and the implanted ear met traditional candidacy criteria...
March 26, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29680860/preservation-of-hearing-following-cochlear-implantation-using-different-steroid-therapy-regimens-a-prospective-clinical-study
#2
Magdalena Beata Skarżyńska, Piotr Henryk Skarżyński, Bartłomiej Król, Magdalena Kozieł, Kamila Osińska, Elżbieta Gos, Henryk Skarżyński
BACKGROUND A prospective clinical study was conducted to assess different regimens of steroid therapy and preservation of hearing following cochlear implantation. MATERIAL AND METHODS Study participants were ≥18 years-of-age, with a cochlear duct length ≥27.1 mm measured by computed tomography (CT), with hearing sound levels in the range of 10-120 decibels (dB) and sound frequencies of 125-250 hertz (Hz); sound levels of 35-120 dB and frequencies of 500-1,000 Hz; sound levels of 75-120 dB and frequencies of 2,000-8,000 Hz...
April 22, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29680680/pneumolabyrinth-intracochlear-and-vestibular-fluid-loss-after-cochlear-implantation
#3
Hideaki Moteki, Yasunari Fujinaga, Tetsuya Goto, Shin-Ichi Usami
The present case was a 38-year-old male who presented with progressive hearing loss, resulting in profound bilateral hearing loss. He had a past history of childhood medulloblastoma, which was treated with posterior fossa craniotomy and radiotherapy. A ventriculoperitoneal (VP) shunt was put in place to manage the hydrocephalus. Cochlear implantation (CI) was carried out on his right ear by a standard procedure. At CI activation, the electric impedance of the electrode was very high, and computed tomography revealed that there was no area of liquid density, suggesting depletion of the perilymph in the cochlea and vestibule...
April 18, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29678970/feasibility-of-personalised-remote-long-term-follow-up-of-people-with-cochlear-implants-a-randomised-controlled-trial
#4
Helen Cullington, Padraig Kitterick, Mark Weal, Magdalena Margol-Gromada
INTRODUCTION: Substantial resources are required to provide lifelong postoperative care to people with cochlear implants. Most patients visit the clinic annually. We introduced a person-centred remote follow-up pathway, giving patients telemedicine tools to use at home so they would only visit the centre when intervention was required. OBJECTIVES: To assess the feasibility of comparing a remote care pathway with the standard pathway in adults using cochlear implants...
April 20, 2018: BMJ Open
https://www.readbyqxmd.com/read/29673567/electric-acoustic-forward-masking-in-cochlear-implant-users-with-ipsilateral-residual-hearing
#5
Marina Imsiecke, Benjamin Krüger, Andreas Büchner, Thomas Lenarz, Waldo Nogueira
In order to investigate the temporal mechanisms of the auditory system, psychophysical forward masking experiments were conducted in cochlear implant users who had preserved acoustic hearing in the ipsilateral ear. This unique electric-acoustic stimulation (EAS) population allowed the measurement of threshold recovery functions for acoustic or electric probes in the presence of electric or acoustic maskers, respectively. In the electric masking experiment, the forward masked threshold elevation of acoustic probes was measured as a function of the time interval after the offset of the electric masker, i...
April 9, 2018: Hearing Research
https://www.readbyqxmd.com/read/29672320/correlation-between-preoperative-auditory-steady-state-response-and-postoperative-electrically-evoked-auditory-brainstem-response-and-t-level-in-cochlear-implantation-for-child-patients-with-inner-ear-malformations
#6
Xiao-Feng Qiao, Xin Li, Dong Wang, Tong-Li Li
OBJECTIVE: This study aims to investigate the correlation between thresholds of preoperative multiple auditory steady-state response (ASSR) and electrically evoked auditory brainstem response (EABR) and the behavioral threshold. METHODS: A total of 72 patients were elected to receive a multichannel cochlear implant. According to the residual hearing determined in a preoperative test using high-, moderate-, and low-frequency ASSR, these patients were divided into the following 2 groups: residual hearing and hearing loss...
April 19, 2018: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/29671961/tmtc2-variant-associated-with-sensorineural-hearing-loss-and-auditory-neuropathy-spectrum-disorder-in-a-family-dyad
#7
Hector Guillen-Ahlers, Christy B Erbe, Frédéric D Chevalier, Maria J Montoya, Kip D Zimmerman, Carl D Langefeld, Michael Olivier, Christina L Runge
BACKGROUND: Sensorineural hearing loss (SNHL) is a common form of hearing loss that can be inherited or triggered by environmental insults; auditory neuropathy spectrum disorder (ANSD) is a SNHL subtype with unique diagnostic criteria. The genetic factors associated with these impairments are vast and diverse, but causal genetic factors are rarely characterized. METHODS: A family dyad, both cochlear implant recipients, presented with a hearing history of bilateral, progressive SNHL, and ANSD...
April 19, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29671090/postoperative-cognitive-dysfunction-after-cochlear-implantation
#8
Annes J Claes, Suzanne de Backer, Paul Van de Heyning, Annick Gilles, Vincent Van Rompaey, Griet Mertens
PURPOSE: Postoperative cognitive dysfunction (PCD) is a subtle, prolonged deterioration in cognition after surgery. This complication has been frequently investigated, mainly after major (cardiac) surgery. However, the incidence after cochlear implantation is unknown. Therefore, the aim of the study was to investigate the incidence and possible risk factors of PCD in severely hearing-impaired older adults after cochlear implantation. METHODS: In a prospective cohort study, 26 older participants (age: M = 70, SD = 8 years), scheduled for cochlear implantation, were assessed prior to and 1 week after implantation by means of the Montreal Cognitive Assessment (MoCA)...
April 18, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29664750/head-movements-allow-listeners-bilaterally-implanted-with-cochlear-implants-to-resolve-front-back-confusions
#9
M Torben Pastore, Sarah J Natale, William A Yost, Michael F Dorman
OBJECTIVES: We report on the ability of patients fit with bilateral cochlear implants (CIs) to distinguish the front-back location of sound sources both with and without head movements. At issue was (i) whether CI patients are more prone to front-back confusions than normal hearing listeners for wideband, high-frequency stimuli; and (ii) if CI patients can utilize dynamic binaural difference cues, in tandem with their own head rotation, to resolve these front-back confusions. Front-back confusions offer a binary metric to gain insight into CI patients' ability to localize sound sources under dynamic conditions not generally measured in laboratory settings where both the sound source and patient are static...
April 16, 2018: Ear and Hearing
https://www.readbyqxmd.com/read/29664726/measurement-of-the-electrically-evoked-stapedial-reflex-response-with-wideband-acoustic-reflectance-measurement
#10
Jace Wolfe, Rene Gifford, Erin Schafer
BACKGROUND: The electrically evoked stapedial reflex threshold (ESRT) has been shown to be a good predictor of upper stimulation level for cochlear implant recipients. Previous research has shown that the ESRT may be recorded at lower stimulation levels and with a higher incidence of success with the use of higher frequency probe tones (e.g., 678 and 1000 Hz) relative to the use of the conventional 226-Hz probe tone. Research has also shown that the acoustic reflex may be recorded at lower stimulus levels with the use of wideband reflectance when compared to the acoustic reflex threshold recorded with a conventional acoustic immittance measurement...
April 2018: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/29664723/the-value-of-electrically-evoked-stapedius-reflex-in-determining-the-maximum-comfort-level-of-a-cochlear-implant
#11
Kelly Cristina Lira de Andrade, Lilian Ferreira Muniz, Pedro de Lemos Menezes, Silvio da Silva Caldas Neto, Aline Tenório Lins Carnaúba, Mariana de Carvalho Leal
BACKGROUND: One of the most important steps for good user performance with a cochlear implant (CI) is activation and programming, aimed at determining the dynamic range. In adults, current levels are determined by psychophysical measures. In babies, small children, or individuals with multiple disorders, this procedure requires techniques that may provide inconsistent responses because of auditory inexperience or the age of the child, making it a very difficult process that demands the collaboration of both the patient and the family...
April 2018: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/29662020/pheochromocytoma-pc12-cell-response-on-mechanobactericidal-titanium-surfaces
#12
Jason V Wandiyanto, Denver Linklater, Pallale G Tharushi Perera, Anna Orlowska, Vi Khanh Truong, Helmut Thissen, Shahram Ghanaati, Vladimir Baulin, Russell J Crawford, Saulius Juodkazis, Elena P Ivanova
Titanium is a biocompatible material that is frequently used for making implantable medical devices. Nanoengineering of the surface is the common method for increasing material biocompatibility, and while the nanostructured materials are well-known to represent attractive substrata for eukaryotic cells, very little information has been documented about the interaction between mammalian cells and bactericidal nanostructured surfaces. In this study, we investigated the effect of bactericidal titanium nanostructures on PC12 cell attachment and differentiation—a cell line which has become a widely used in vitro model to study neuronal differentiation...
April 14, 2018: Materials
https://www.readbyqxmd.com/read/29661329/hearing-loss-in-the-elderly
#13
REVIEW
Rohan Patel, Brian J McKinnon
Presbycusis, or age-related hearing loss (ARHL), is the result of physiologic and pathologic changes associated with advancing age. ARHL presents typically with a high-frequency hearing loss, which contributes to greater trouble hearing consonants within words. Consonants convey the bulk of meaning within a word, and this loss of linguistic information results in complaints associated with ARHL. Hearing aids and cochlear implants significantly improve the lives of older adults with hearing loss, in particular, those with depression and dementia...
May 2018: Clinics in Geriatric Medicine
https://www.readbyqxmd.com/read/29658405/real-time-intracochlear-imaging-of-automated-cochlear-implant-insertions-in-whole-decalcified-cadaver-cochleas-using-ultrasound
#14
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...
April 16, 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29652892/the-effects-of-electrical-field-spatial-spread-and-some-cognitive-factors-on-speech-in-noise-performance-of-individual-cochlear-implant-users-a-computer-model-study
#15
Tim Jürgens, Volker Hohmann, Andreas Büchner, Waldo Nogueira
The relation of the individual speech-in-noise performance differences in cochlear implant (CI) users to underlying physiological factors is currently poorly understood. This study approached this research question by a step-wise individualization of a computer model of speech intelligibility mimicking the details of CI signal processing and some details of the physiology present in CI users. Two factors, the electrical field spatial spread and internal noise (as a coarse model of the individual cognitive performance) were incorporated...
2018: PloS One
https://www.readbyqxmd.com/read/29650304/the-design-and-validation-of-a-hybrid-digital-signal-processing-plug-in-for-traditional-cochlear-implant-speech-processors
#16
Fatemeh Hajiaghababa, Hamid R Marateb, Saeed Kermani
BACKGROUND AND OBJECTIVE: Cochlear implants (CIs) are electronic devices restoring partial hearing to deaf individuals with profound hearing loss. In this paper, a new plug-in for traditional IIR filter-banks (FBs) is presented for cochlear implants based on wavelet neural networks (WNNs). Having provided such a plug-in for commercially available CIs, it is possible not only to use available hardware in the market but also to optimize their performance compared with the-state-of-the-art...
June 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29649894/use-of-neural-response-telemetry-for-pediatric-cochlear-implants-current-practice
#17
Galit Almosnino, Samantha Anne, Seth R Schwartz
OBJECTIVES: Evaluate usage trends of neural response telemetry (NRT) in cochlear implant centers across the nation and assess reported benefits of intraoperative NRT for pediatric cochlear implant recipients. STUDY DESIGN: Survey. STUDY PARTICIPANTS: All US cochlear implant centers (n = 110). METHODS: A 15-question multiple-choice survey was distributed electronically to all centers. The survey captured demographic information of all centers, practice patterns surrounding the use of NRT, and the extent to which intraoperative NRT is of benefit...
April 1, 2018: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29649048/improved-speech-perception-in-cochlear-implant-users-with-interleaved-high-rate-pulse-trains
#18
Christina L Runge, Fang Du, Yi Hu
OBJECTIVE: Electrical stimulation with a cochlear implant (CI) elicits abnormally high neural synchrony, which poses significant challenges for speech perception. Previous investigations showed that constant-amplitude high-rate pulse trains (HRPs) desynchronize neural responses and improve stimulus encoding. The study objective was to investigate the effects of HRP on speech perception in adult CI users. STUDY DESIGN: Prospective, within-subject design. SETTING: Tertiary CI center...
April 11, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29649047/preliminary-outcomes-report-for-co2-laser-assisted-electric-acoustic-cochlear-implantation
#19
Shawn M Stevens, Andrew Redmann, Kayla Whitaker, Alyson Ruotanen, Lisa Houston, Theresa Hammer, Ravi N Samy
OBJECTIVE: Report on the safety/efficacy of a novel, carbon dioxide (CO2) laser-assisted protocol for hearing-preservation cochlear implantation (HPCI) and electric-acoustic stimulation (EAS). STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral center. PATIENTS: Adult patients meeting established criteria for HPCI and EAS. INTERVENTION: Therapeutic/rehabilitative. A standardized protocol used CO2 laser to achieve meticulous hemostasis and perform cochleostomy was evaluated...
April 11, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29649039/barriers-to-rehabilitation-care-in-pediatric-cochlear-implant-recipients
#20
Bryce Noblitt, Kristan P Alfonso, Margaret Adkins, Matthew L Bush
OBJECTIVE: The purpose of this study was to assess barriers to rehabilitation care for pediatric cochlear implant (CI) recipients. STUDY DESIGN: Cross-sectional questionnaire study. SETTING: Tertiary medical center. PATIENTS: Parents of children who received a CI from October 1996 to June 2013. MAIN OUTCOME MEASURE(S): Factors related to access to and barriers in audiology and speech therapy services, factors related to CI use, and performance with CI using the Parents' Evaluation of Aural/Oral Performance of Children (PEACH)...
April 11, 2018: Otology & Neurotology
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