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Auditory Brainstem Implant

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https://www.readbyqxmd.com/read/28634435/the-clinical-uses-of-electrocochleography
#1
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/28631161/the-role-of-eabr-with-intracochlear-test-electrode-in-decision-making-between-cochlear-and-brainstem-implants-preliminary-results
#2
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/28607224/evaluation-of-focused-multipolar-stimulation-for-cochlear-implants-a-preclinical-safety-study
#3
Robert K Shepherd, Andrew K Wise, Ya Lang Enke, Paul M Carter, James B Fallon
OBJECTIVE: Cochlear implants (CIs) have a limited number of independent stimulation channels due to the highly conductive nature of the fluid-filled cochlea. Attempts to develop highly focused stimulation to improve speech perception in CI users includes the use of simultaneous stimulation via multiple current sources. Focused multipolar (FMP) stimulation is an example of this approach and has been shown to reduce interaction between stimulating channels. However, compared with conventional biphasic current pulses generated from a single current source, FMP is a complex stimulus that includes extended periods of stimulation before charge recovery is achieved, raising questions on whether chronic stimulation with this strategy is safe...
June 13, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28573831/auditory-and-otologic-profile-of-alstr%C3%A3-m-syndrome-comprehensive-single-center-data-on-38-patients
#4
Spencer Lindsey, Carmen Brewer, Olga Stakhovskaya, Hung Jeffrey Kim, Chris Zalewski, Joy Bryant, Kelly A King, Jürgen K Naggert, William A Gahl, Jan D Marshall, Meral Gunay-Aygun
Alström syndrome (AS) is a rare autosomal recessive ciliopathy caused by mutations in the ALMS1 gene. Hallmark characteristics include childhood onset of severe retinal degeneration, sensorineural hearing loss, obesity, insulin-resistant diabetes, and cardiomyopathy. Here we comprehensively characterize the auditory and otologic manifestations in a prospective case series of 38 individuals, aged 1.7-37.9 years, with genetically confirmed AS. Hearing loss was preceded by retinal dystrophy in all cases, and had an average age of detection of 7...
June 1, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28537687/the-effect-of-optimizing-eabr-parameters-in-artificial-cochlear-implantation-for-auditory-rehabilitation
#5
H-L Yang, Z Liu
OBJECTIVE: The objective of the present study was to observe the relationship between V extraction rate and threshold value of electrically evoked auditory brainstem response (EABR) waves in artificial cochlear implantation, in order to optimize EABR parameters for improving auditory rehabilitation. PATIENTS AND METHODS: Thirty patients without residual hearing and treated with artificial cochlear implants were selected. The experimental group included 17 cases with normal cochlear morphology, four with large vestibular aqueduct syndrome (LVAS), six with Mondini malformation, and three with internal auditory canal stenosis...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28498265/the-effect-of-systemic-steroid-on-hearing-preservation-after-cochlear-implantation-via-round-window-approach-a-guinea-pig-model
#6
Mun Young Chang, Yoon Chan Rah, Jun Jae Choi, Shin Wook Woo, Yu-Jung Hwang, Hayden Eastwood, Stephen J O'Leary, Jun Ho Lee
HYPOTHESIS: When administered perioperatively, systemic dexamethasone will reduce the hearing loss associated with cochlear implantation (CI) performed via the round window approach. BACKGROUND: The benefits of electroacoustic stimulation have led to interest in pharmacological interventions to preserve hearing after CI. METHODS: Thirty guinea pigs were randomly divided into three experimental groups: a control group; a 3-day infusion group; and a 7-day infusion group...
May 11, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28483247/does-cerebellar-flocculus-size-affect-subjective-outcomes-in-pediatric-auditory-brainstem-implantation
#7
Sunil Goyal, Shyam Sundar Krishnan, Mohan Kameswaran, M C Vasudevan, Ranjith, Kiran Natarajan
OBJECTIVES: The objectives of study was to 1) Describe relevant surgical anatomy in defining and accessing the lateral recess for placement of electrode, 2) Propose a working classification for grades of Flocculus; 3) To determine if different grades of cerebellar flocculus effects placement of ABI electrode and subjective outcomes in implantees. METHODS: Our study was a prospective study, and comprised of cohort of 12 patients who underwent ABI surgery via retrosigmoid approach between 1 Jan 2012 to 31 Dec 2014...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28443060/the-vestibular-implant-hearing-preservation-during-intralabyrinthine-electrode-insertion-a-case-report
#8
Raymond van de Berg, Florence Lucieer, Nils Guinand, Joost van Tongeren, Erwin George, Jean-Philippe Guyot, Herman Kingma, Marc van Hoof, Yasin Temel, Jacobus van Overbeeke, Angelica Perez-Fornos, Robert Stokroos
OBJECTIVE: The vestibular implant seems feasible as a clinically useful device in the near future. However, hearing preservation during intralabyrinthine implantation remains a challenge. It should be preserved to be able to treat patients with bilateral vestibulopathy and (partially) intact hearing. This case study investigated the feasibility of hearing preservation during the acute phase after electrode insertion in the semicircular canals. METHODS: A 40-year-old woman with normal hearing underwent a translabyrinthine approach for a vestibular schwannoma Koos Grade IV...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28420277/device-optimised-chirp-stimulus-for-abr-measurements-with-an-active-middle-ear-implant
#9
Mario Cebulla, Ute Geiger, Rudolf Hagen, Andreas Radeloff
OBJECTIVE: Active middle ear implants are widely used to treat adults and children with sensorineural, conductive, or mixed hearing loss. Currently, there is no adequate method to determine the performance of active middle ear implant systems. DESIGN: The proposed method is based on measuring the auditory brainstem response while stimulating the hearing system via the active middle ear implant (Vibrant Soundbridge(TM), VSB; MEDEL, Austria). The acoustic stimulation was achieved via an optimised chirp stimulus (CE-Chirp), implemented in the Eclipse system (Interacoustics, Denmark)...
April 19, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28371358/hearing-optimization-in-neurofibromatosis-type-2-a-systematic-review
#10
Simon Kingsley Wickham Lloyd, Andrew Thomas King, Scott Alexander Rutherford, Charlotte Lucy Hammerbeck-Ward, Simon Richard MacKenzie Freeman, Deborah Jane Mawman, Martin O'Driscoll, Dafydd Gareth Evans
BACKGROUND: It is common for patients with Neurofibromatosis type 2 to develop bilateral profound hearing loss hearing loss and this is one of the main determinants of quality of life in this patient group. OBJECTIVES: The aim of this systematic review was to review the current literature regarding hearing outcomes of treatments for vestibular schwannomas in neurofibromatosis type 2 including conservative and medical management, radiotherapy, hearing preservation surgery and auditory implantation in order to determine the most effective way of preserving or rehabilitating hearing Search Strategy: A MESH search in PubMed using search terms (("Neurofibromatosis 2"[Mesh]) AND "Neuroma, Acoustic"[Mesh]) AND "Hearing Loss"[Mesh] was performed...
April 1, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28357188/audiological-findings-from-an-adult-with-thin-cochlear-nerves
#11
Prashanth Prabhu, Jyothi Shivaswamy
Reported here are audiological findings from an adult with thin cochlear nerves. Magnetic resonance imaging (MRI) revealed that he had a thinner cochlear nerve in the left ear than in the right ear. He had a higher degree of hearing loss in the left ear and poor speech recognition scores for both ears. He had normal middle ear and cochlear functioning. The auditory brainstem response and acoustic reflexes were absent, indicating a retrocochlear pathology. Long latency responses (LLR) revealed normal cortical functioning...
February 2017: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/28355382/satisfaction-and-quality-of-life-in-users-of-auditory-brainstem-implant
#12
Nayara Freitas Fernandes, Maria Valéria Schmidt Goffi-Gomez, Ana Tereza De Matos Magalhães, Robinson Koji Tsuji, Rubens Vuono De Brito, Ricardo Ferreira Bento
Purpose To evaluate satisfaction and quality of life of users of Auditory Implant Brainstem. Methods This is a cross-sectional and descriptive study conducted at Divisão de Clínica Otorrinolaringológica of Hospital das Clínicas of Faculdade de Medicina da Universidade de São Paulo, Brazil. For the research, 19 users of an Auditory Brainstem Implant answered the following questionnaires: KINDLR (Questionnaire for Measuring Health-Related Quality of Life in Children and Adolescents), for children and adolescents, their parents and/or caregivers; WHOQOL-BREF questionnaire, for adult participants; and the Satisfaction with Amplification in Daily Life (SADL) questionnaire culturally adapted to Brazilian Portuguese...
2017: CoDAS
https://www.readbyqxmd.com/read/28335700/cochlear-implants-in-the-management-of-hearing-loss-in-neurofibromatosis-type-2
#13
Frances Harris, James R Tysome, Neil Donnelly, Juliette Durie-Gair, Gemma Crundwell, Yu Chuen Tam, Richard D Knight, Zebunnisa H Vanat, Nicola Folland, Patrick Axon
OBJECTIVE: Review of cochlear implant (CI) outcomes in patients with Neurofibromatosis Type 2 (NF2), implanted in the presence of an ipsilateral vestibular schwannoma (VS). Hearing restoration was combined in some cases with a Bevacizumab regime. METHOD: Retrospective review of 12 patients, managed over the period 2009-2016, at a tertiary referral multidisciplinary NF2 clinic. The patients are grouped by hearing outcomes to explore likely protective factors, and to generate a proposed decision-making tool for the selection of either CI or Auditory Brainstem Implant (ABI)...
May 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28292001/-implantable-bone-conduction-and-active-middle-ear-devices
#14
Markus Pirlich, Andreas Dietz, Sylvia Meuret, Mathias Hofer
In case of audiological and/or anatomical limitations in the provision of conventional hearing aids, semi- or fully-implantable hearing systems represent a modern therapy alternative. These hearing systems are divided according to their mode of action into active middle ear implants when stimulating the auditory ossicles or the round window, into bone conduction devices while stimulating the skull directly, into cochlear implants with direct acoustic stimulation to the cochlea with its auditory nerve and finally into auditory brainstem implants by bridging the peripheral auditory structures...
February 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28269101/detection-of-binaural-interaction-in-free-field-evoked-auditory-brainstem-responses-by-time-scale-representations
#15
Erik Schebsdat, Horst Hessel, Harald Seidler, Daniel J Strauss
The so called β-wave of the binaural interaction component (BIC) in auditory brainstem responses (ABR) has been shown to be an objective measure for binaural interaction (BI). This component is the arithmetical difference between the sum of the monaurally evoked ABRs and the binaurally evoked ABR. Unfortunately, these neural responses are known to be very fragile and as a result the calculated BIC. An additional issue is, that the findings of this measurement are predominantly needed in people with hearing loss who may use hearing devices like hearing aids (HA) or cochlear implants (CI), thus they are not able to use headphones (like in conventional ABR measurements) during the detection of possible BI...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227326/detection-of-binaural-interaction-in-free-field-evoked-auditory-brainstem-responses-by-time-scale-representations
#16
Erik Schebsdat, Horst Hessel, Harald Seidler, Daniel J Strauss, Erik Schebsdat, Horst Hessel, Harald Seidler, Daniel J Strauss, Horst Hessel, Erik Schebsdat, Harald Seidler, Daniel J Strauss
The so called β-wave of the binaural interaction component (BIC) in auditory brainstem responses (ABR) has been shown to be an objective measure for binaural interaction (BI). This component is the arithmetical difference between the sum of the monaurally evoked ABRs and the binaurally evoked ABR. Unfortunately, these neural responses are known to be very fragile and as a result the calculated BIC. An additional issue is, that the findings of this measurement are predominantly needed in people with hearing loss who may use hearing devices like hearing aids (HA) or cochlear implants (CI), thus they are not able to use headphones (like in conventional ABR measurements) during the detection of possible BI...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28210535/magnetic-resonance-imaging-in-a-neurofibromatosis-type-2-patient-with-a-novel-mri-compatible-auditory-brainstem-implant
#17
REVIEW
Matthew Shew, Judson Bertsch, Paul Camarata, Hinrich Staecker
Auditory brainstem implantation has become a key technique for the rehabilitation of hearing in patients with neurofibromatosis type 2. The nature of this devastating genetic disease requires ongoing MRI for the patient's lifespan. Today, most auditory brainstem implants require removal of the magnet that connects the internal device to the external speech processor to undergo imaging as their disease progresses. Patients have the option of having a short procedure to have the magnet taken out and replaced each time, or alternately using a headband to secure the processor over the receiver coil of the internal device...
January 2017: Journal of Neurological Surgery Reports
https://www.readbyqxmd.com/read/28209771/hearing-loss-in-children-with-asymptomatic-congenital-cytomegalovirus-infection
#18
Tatiana M Lanzieri, Winnie Chung, Marily Flores, Peggy Blum, A Chantal Caviness, Stephanie R Bialek, Scott D Grosse, Jerry A Miller, Gail Demmler-Harrison
OBJECTIVES: To assess the prevalence, characteristics, and risk of sensorineural hearing loss (SNHL) in children with congenital cytomegalovirus infection identified through hospital-based newborn screening who were asymptomatic at birth compared with uninfected children. METHODS: We included 92 case-patients and 51 controls assessed by using auditory brainstem response and behavioral audiometry. We used Kaplan-Meier survival analysis to estimate the prevalence of SNHL, defined as ≥25 dB hearing level at any frequency and Cox proportional hazards regression analyses to compare SNHL risk between groups...
March 2017: Pediatrics
https://www.readbyqxmd.com/read/28185669/electrical-stimulation-and-monitoring-devices-of-the-cns-an-imaging-review
#19
REVIEW
Sohil H Patel, Casey H Halpern, Timothy M Shepherd, Vincent M Timpone
Functional neurosurgery is a rapidly growing field with exciting future potential applications. This article describes currently used implanted electronic devices for neurologic stimulation and monitoring. The devices to be reviewed include invasive EEG electrodes, deep brain stimulator, motor cortex stimulator, responsive neurostimulation, osteo-integrated hearing aid, middle ear implant, cochlear implant, auditory brainstem implant, vagal nerve stimulator and spinal cord stimulator. Emphasis is placed on the normal components, function, positioning, potential complications and MRI safety of these devices...
February 6, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28174524/ups-and-downs-in-75-years-of-electrocochleography
#20
REVIEW
Jos J Eggermont
Before 1964, electrocochleography (ECochG) was a surgical procedure carried out in the operating theatre. Currently, the newest application is also an intra-operative one, often carried out in conjunction with cochlear implant surgery. Starting in 1967, the recording methods became either minimal- or not-invasive, i.e., trans-tympanic (TT) or extra tympanic (ET), and included extensive studies of the arguments pro and con. I will review several valuable applications of ECochG, from a historical point of view, but covering all 75 years if applicable...
2017: Frontiers in Systems Neuroscience
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