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Electroacoustic stimulation

Jorge de Abajo, Raquel Manrique-Huarte, Ignacio Sanhueza, Laura Alvarez-Gómez, Cristina Zulueta-Santos, Diego Calavia, Fernando Ramírez, Manuel Manrique
OBJECTIVES: The objectives of this study were to evaluate the effect of reimplanting a cochlear implant electrode in animal normal-hearing cochlea to propose measures that may prevent cochlear injury and, given its close phylogenetic proximity to humans, to evaluate the macaque as a model for electroacoustic stimulation. DESIGN: Simultaneous, bilateral surgical procedures in a group of 5 normal-hearing specimens (Macaca fascicularis) took place in a total of 10 ears...
January 2017: Ear and Hearing
Hartmut Meister, Katrin Fuersen, Stefan Schreitmueller, Martin Walger
This study addressed the hypothesis that an improvement in speech recognition due to combined envelope and fine structure cues is greater in the audiovisual than the auditory modality. Normal hearing listeners were presented with envelope vocoded speech in combination with low-pass filtered speech. The benefit of adding acoustic low-frequency fine structure to acoustic envelope cues was significantly greater for audiovisual than for auditory-only speech. It is suggested that this is due to complementary information of the different acoustic and visual cues...
June 2016: Journal of the Acoustical Society of America
Mika Sato, Peter Baumhoff, Andrej Kral
UNLABELLED: Electroacoustic stimulation in subjects with residual hearing is becoming more widely used in clinical practice. However, little is known about the properties of electrically induced responses in the hearing cochlea. In the present study, normal-hearing guinea pig cochleae underwent cochlear implantation through a cochleostomy without significant loss of hearing. Using recordings of unit activity in the midbrain, we were able to investigate the excitation patterns throughout the tonotopic field determined by acoustic stimulation...
January 6, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Joseph P Roche, Marlan R Hansen
Cochlear implantation and cochlear implants (CIs) have a long history filled with innovations that have resulted in the high-performing device's currently available. Several promising technologies have been reviewed in this article, which hold the promise to drive performance even higher. Remote CI programming, totally implanted devices, improved neural health and survival through targeted drug therapy and delivery, intraneural electrode placement, electroacoustical stimulation and hybrid CIs, and methods to enhance the neural-prosthesis interface are evolving areas of innovation reviewed in this article...
December 2015: Otolaryngologic Clinics of North America
Nathaniel T Greene, Jameson K Mattingly, Herman A Jenkins, Daniel J Tollin, James R Easter, Stephen P Cass
HYPOTHESIS: Cochlear implants (CIs) designed for hearing preservation will not alter mechanical properties of the middle and inner ears as measured by intracochlear pressure (P(IC)) and stapes velocity (Vstap). BACKGROUND: CIs designed to provide combined electroacoustic stimulation are now available. To maintain functional acoustic hearing, it is important to know if a CI electrode can alter middle or inner ear mechanics because any alteration could contribute to elevated low-frequency thresholds in electroacoustic stimulation patients...
September 2015: Otology & Neurotology
G A Tavartkiladze
This paper reports the literature data summarizing the recent achievements in the field of rehabilitation of the patients suffering from deafness and serious impairment of hearing with the use of cochlear implantation. Much attention is given to the limitations of the modern strategies of signal processing and the prospects for the further development of scientific research in this area. Special emphasis is laid on recent progress in audiology including the binaural cochlear implant technology and the electroacoustic stimulation facilitating significant improvement in the outcomes of rehabilitation of the patients...
2015: Vestnik Otorinolaringologii
Alexandre Caixeta Guimarães, Guilherme Machado de Carvalho, Alexandre S M Duarte, Walter A Bianchini, Andrea Bravo Sarasty, Maria Fernanda di Gregorio, Mario Emilio Zernotti, Edi Lúcia Sartorato, Arthur Menino Castilho
INTRODUCTION: Electroacoustic stimulation is an excellent option for people with residual hearing in the low frequencies, who obtain insufficient benefit with hearing aids. To be effective, the subject's residual hearing should be preserved during cochlear implant surgery. OBJECTIVES: To evaluate the hearing preservation in patients that underwent implant placement and to compare the results in accordance with the approach to the inner ear. METHODS: 19 subjects underwent a soft surgical technique, and the electrode MED-EL FLEX™ EAS, designed to be atraumatic, was used...
March 2015: Brazilian Journal of Otorhinolaryngology
S Irving, L Gillespie, R Richardson, D Rowe, J B Fallon, A K Wise
Cochlear implants have provided hearing to hundreds of thousands of profoundly deaf people around the world. Recently, the eligibility criteria for cochlear implantation have been relaxed to include individuals who have some useful residual hearing. These recipients receive inputs from both electric and acoustic stimulation (EAS). Implant recipients who can combine these hearing modalities demonstrate pronounced benefit in speech perception, listening in background noise, and music appreciation over implant recipients that rely on electrical stimulation alone...
2014: BioMed Research International
Sebastian P Schraven, Robert Mlynski, Ernst Dalhoff, Daniela Wildenstein, Balint Alkonyi, Anthony W Gummer, Rudolf Hagen
HYPOTHESIS: In situ evaluation of the vibration performance of a hybrid system for intracochlear fluid stimulation, constructed from a floating mass transducer (FMT) coupled to an electric acoustic stimulation (EAS) cochlea implant (CI) electrode. BACKGROUND: EAS uses both CI technology to restore severe-to-profound hearing loss at high frequencies and acoustic amplification for mild-to-moderate hearing loss in the low-to-mid frequency range. More patients with residual hearing are becoming candidates for EAS surgery because of the improved techniques for hearing preservation...
January 2015: Otology & Neurotology
Ahmad F Mahmoud, Sean T Massa, Stacy L Douberly, Michelle L Montes, Michael J Ruckenstein
OBJECTIVE: To determine the safety, efficacy, and potential for hearing preservation of an electroacoustic hearing system in patients with severe high-frequency and moderate low-frequency hearing loss. PATIENTS: Five patients were included in this study with steeply down-sloping sensorineural hearing loss. All patients had a history of hearing aid use and similar hearing in the contralateral ear. Ages ranged from 48 to 69 years. INTERVENTION: All participants were implanted with an electro-acoustic stimulation (EAS) device using a hearing preservation technique...
September 2014: Otology & Neurotology
V I Fedoseev, N S Dmitriev
The objective of the present study was to estimate and analyse the effectiveness and labour intensity of the methods of surgical intervention for cochlear implantation. The analysis of the surgical stage of cochlear implantation was based on the examination of 2073 children and adults during the period from 1991 to 2013. The age of the patients varied between 6 months to 71 years. The cause of deafness was meningitis and an injury in 11% and 6% of the patients respectively. The cochlear implants from Advanced Bionics were inserted in 495 patients, those from Med-El in 9 ones , and from Neurelec in 20, and Nucleus devices from Cochlear in the remaining patents (n=1549) including 37 double-array electrodes and a Hybrid implant for electroacoustic correction of hearing ...
2014: Vestnik Otorinolaringologii
Erin C Schafer, Denise Romine, Elizabeth Musgrave, Sadaf Momin, Christy Huynh
BACKGROUND: Previous research has suggested that electrically coupled frequency modulation (FM) systems substantially improved speech-recognition performance in noise in individuals with cochlear implants (CIs). However, there is limited evidence to support the use of electromagnetically coupled (neck loop) FM receivers with contemporary CI sound processors containing telecoils. PURPOSE: The primary goal of this study was to compare speech-recognition performance in noise and subjective ratings of adolescents and adults using one of three contemporary CI sound processors coupled to electromagnetically and electrically coupled FM receivers from Oticon...
November 2013: Journal of the American Academy of Audiology
Rolien H Free, Maurizio Falcioni, Giuseppe Di Trapani, Anna Lisa Giannuzzi, Alessandra Russo, Mario Sanna
OBJECTIVE: To report and review 32 cases of subtotal petrosectomy (SP) in cochlear implant (CI) surgery and to define the indications and contraindications for this procedure. STUDY DESIGN: Retrospective case review + case reports. SETTING: Tertiary skull base center. PATIENTS: Cochlear implant database: 32 subtotal petrosectomies in 31 patients. INTERVENTIONS: Subtotal petrosectomy with blind sac closure of the external auditory canal, closure of Eustachian tube, and abdominal fat obliteration in combination with cochlear implantation...
August 2013: Otology & Neurotology
Luciana P Garolla, Susan D Scollie, Maria Cecília Martinelli Iório
OBJECTIVE: Recommended practice is to verify the gain and/or output of hearing aids with speech or speech-shaped signals. This study has the purpose of developing a speech test signal in Brazilian Portuguese that is electroacoustically similar to the international long-term average speech spectrum (ILTASS) for use in real ear verification systems. DESIGN: A Brazilian Portuguese speech passage was recorded using standardized equipment and procedures for one female talker and compared to ISTS...
August 2013: International Journal of Audiology
H Christiaan Stronks, Huib Versnel, Vera F Prijs, John C M J de Groot, Wilko Grolman, Sjaak F L Klis
HYPOTHESIS: Interactions between cochlear responses to combined electrical and acoustic stimulation (EAS) depend on electrically evoked hair cell activity (i.e., electrophonics). BACKGROUND: Although relevant for EAS strategies in cochlear implant users with residual low-frequency hearing, cochlear responses to EAS are not well characterized. Previously, we have shown that acoustically evoked compound action potentials (CAPs) can be suppressed by electrical stimulation...
April 2013: Otology & Neurotology
Kimberly A Pollard, Phuong K Tran, Tomasz R Letowski
Bone conduction communication systems employ a variety of transducers with different physical and electroacoustic properties, and these transducers may be worn at various skull locations. Testing these systems thus requires a reliable means of transducer calibration that can be implemented across different devices, skull locations, and settings. Unfortunately, existing calibration standards do not meet these criteria. Audiometric bone conduction standards focus on only one device model and on limited skull locations...
February 2013: Journal of the Acoustical Society of America
H Christiaan Stronks, Vera F Prijs, Theognosia S Chimona, Wilko Grolman, Sjaak F L Klis
HYPOTHESIS: Limiting spatial overlap between electrical stimulation (ES) and acoustical stimulation (AS) in the cochlea reduces the effects of AS on electrically evoked auditory nerve activity. BACKGROUND: Some hybrid cochlear implant systems have a regular array, whereas others have short arrays that spatially segregate ES from AS. AS settings in hybrid implants may also affect electroacoustic interaction. METHODS: ES (900 μA) was delivered in the high-frequency part of the cochlea, and the electrically evoked compound action potential (eCAP) was recorded to assess auditory nerve activity...
December 2012: Otology & Neurotology
Janitha Jayawardena, Jafri Kuthubutheen, Gunesh Rajan
OBJECTIVE: To report and review the clinical experiences of patients who required reimplantation from an ongoing trial of patients with partial deafness who were treated with electroacoustic stimulation (EAS) cochlear implantation. STUDY DESIGN: Retrospective case series review. SETTING: Tertiary referral center. PATIENTS: Two patients with partial deafness, 1 child and 1 adult, who required reimplantation because of device failure occurring 12 to 18 months after hearing preservation cochlear implantation with a Med-El Sonata Flex-EAS electrode array...
July 2012: Otology & Neurotology
Guilherme Machado de Carvalho, João Paulo Peral Valente, Alexandre Scalli Mathias Duarte, Eder Barbosa Muranaka, Alexandre Caixeta Guimarães, Marcelo Naoki Soki, Walter Adriano Bianchini, Arthur Menino Castilho, Jorge Rizzato Paschoal
UNLABELLED: A new era has arrived in auditory rehabilitation with the introduction of new technologies such as electroacoustic stimulation (EAS). EAS is indicated for patients with residual hearing at low frequencies and severe or profound hearing loss at high frequencies. These patients have no indication for conventional cochlear implant and have difficulties in adapting to individual sound amplification devices. Preservation of hearing is vital in this process; the surgical technique must be based on this concept...
February 2012: Brazilian Journal of Otorhinolaryngology
Payal Mukherjee, Hilal Uzun-Coruhlu, Chris C Wong, Ian S Curthoys, Allan S Jones, William P R Gibson
OBJECTIVE: To assess the degree of intracochlear trauma using the Cochlear™ Straight Research Array (SRA). This electrode has recently been released by Cochlear™ on the CI422 implant. BACKGROUND: Electroacoustic stimulation (EAS) enables recipients to benefit from cochlear implantation while retaining their natural low-frequency hearing. A disadvantage of short EAS electrodes is that short electrodes provide limited low-frequency stimulation. Thus, loss of the residual hearing may require reimplantation with a longer electrode...
August 2012: Cochlear Implants International
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