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Electrocochleography

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https://www.readbyqxmd.com/read/28174524/ups-and-downs-in-75-years-of-electrocochleography
#1
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
https://www.readbyqxmd.com/read/28106624/intraoperative-electrocochleography-a-window-into-endolymphatic-hydrops-in-a-patient-with-an-endolymphatic-sac-tumor
#2
William J Riggs, Dominic J Catalano, Michael S Harris, Oliver F Adunka, Aaron C Moberly
OBJECTIVES: Intraoperative electrocochleography (ECochG) provides valuable information regarding inner ear function during surgical procedures. Here, we report findings from ECochG collected at three time intervals during the management of a patient with symptoms of inner ear hydrops. PATIENTS: A 38-year-old man with an endolymphatic sac tumor who demonstrated classic Ménière's symptoms. INTERVENTIONS: Endolymphatic shunt, tumor biopsy, and definitive resection of an endolymphatic sac tumor...
January 18, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/27879487/electrocochleography-in-cochlear-implant-recipients-with-residual-hearing-comparison-with-audiometric-thresholds
#3
Kanthaiah Koka, Aniket A Saoji, Leonid M Litvak
OBJECTIVES: To determine whether electrocochleography (ECoG) thresholds, especially cochlear microphonic and auditory nerve neurophonic thresholds, measured using an intracochlear electrode, can be used to predict pure-tone audiometric thresholds following cochlear implantation in ears with residual hearing. DESIGN: Pure-tone audiometric thresholds and ECoG waveforms were measured at test frequencies from 125 to 4000 Hz in 21 Advanced Bionics cochlear implant recipients with residual hearing in the implanted ear...
November 22, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27861251/fast-click-rate-electrocochleography-and-auditory-brainstem-response-in-normal-hearing-adults-using-continuous-loop-averaging-deconvolution
#4
Wafaa A Kaf, Kelly M Lewis, Erdem Yavuz, Samantha M Dixon, Mark Van Ess, Abdullah M Jamos, Rafael E Delgado
OBJECTIVES: Using the continuous loop averaging deconvolution (CLAD) technique for conventional electrocochleography (ECochG) and auditory brainstem response (ABR) recordings, the effects of testing at high stimulus rates may have the potential to diagnose disorders of the inner ear and auditory nerve. First, a body of normative data using the CLAD technique must be established. DESIGN: Extratympanic click ECochG and ABR to seven stimulus rates using CLAD were measured simultaneously from a tympanic membrane electrode and surface electrodes on the forehead and mastoid of 42 healthy individuals...
November 16, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27749750/the-compound-action-potential-in-subjects-receiving-a-cochlear-implant
#5
William C Scott, Christopher K Giardina, Andrew K Pappa, Tatyana E Fontenot, Meredith L Anderson, Margaret T Dillon, Kevin D Brown, Harold C Pillsbury, Oliver F Adunka, Craig A Buchman, Douglas C Fitzpatrick
HYPOTHESIS: The compound action potential (CAP) is a purely neural component of the cochlea's response to sound, and may provide information regarding the existing neural substrate in cochlear implant (CI) subjects that can help account for variance in speech perception outcomes. BACKGROUND: Measurement of the "total response" (TR), or sum of the magnitudes of spectral components in the ongoing responses to tone bursts across frequencies, has been shown to account for 40 to 50% of variance in speech perception outcomes...
December 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27642665/electrocochleography-for-the-diagnosis-of-m%C3%A3-ni%C3%A3-re-s-disease-the-wrong-stimulus
#6
Jeremy Hornibrook, Philip Bird, Edward Flook, Greg A O'Beirne
No abstract text is available yet for this article.
September 16, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27642664/response-to-letter-to-the-editor-electrocochleography-versus-mri-with-intratympanic-contrast-in-m%C3%A3-ni%C3%A3-re-s-disease
#7
Fuat Ziylan, Diederik P J Smeeing, Inge Stegeman, Hans G X M Thomeer
No abstract text is available yet for this article.
September 16, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27618300/toward-a-differential-diagnosis-of-hidden-hearing-loss-in-humans
#8
M Charles Liberman, Michael J Epstein, Sandra S Cleveland, Haobing Wang, Stéphane F Maison
Recent work suggests that hair cells are not the most vulnerable elements in the inner ear; rather, it is the synapses between hair cells and cochlear nerve terminals that degenerate first in the aging or noise-exposed ear. This primary neural degeneration does not affect hearing thresholds, but likely contributes to problems understanding speech in difficult listening environments, and may be important in the generation of tinnitus and/or hyperacusis. To look for signs of cochlear synaptopathy in humans, we recruited college students and divided them into low-risk and high-risk groups based on self-report of noise exposure and use of hearing protection...
2016: PloS One
https://www.readbyqxmd.com/read/27510227/-preoperative-auditory-evaluation-and-postoperative-follow-up-in-cochlear-implantees-the-role-of-objective-measures
#9
W Shehata-Dieler, W Großmann
The primary diagnostic aim prior to cochlear implantation is establishment of a comprehensive and multidisciplinary diagnosis, in order to subsequently begin therapy as early as possible. Audiological evaluation prior to implantation employs a test battery-approach, including subjective and objective procedures. Objective measures show high reliability and therefore play a major role in the diagnosis of difficult-to-test subjects such as infants and young children. During postoperative follow-up, objective measures offer a valid method for analyzing the effects of different stimuli on the auditory system...
August 10, 2016: HNO
https://www.readbyqxmd.com/read/27424625/apical-hair-cell-degeneration-causes-the-increase-in-the-amplitude-of-summating-potential
#10
Dayong Wang, Binbin Xiong, Fen Xiong, Guang-Di Chen, Bo Hua Hu, Wei Sun
CONCLUSION: This study indicates that the lesion of hair cells in the apical turn of the cochlea can cause the change in the summating potential (SP)/Compound potential (CAP) ratio. OBJECTIVES: Electrocochleography is a valuable clinic test for diagnosis of cochlear pathologies and the ratio of SP to CAP has been used to identify Meniere's disease. However, it remains controversial whether the increase of the SP/CAP ratio represents exclusively the endolymphatic hydrops...
December 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27397722/evaluation-of-vestibular-evoked-myogenic-potentials-vemp-and-electrocochleography-for-the-diagnosis-of-m%C3%A3-ni%C3%A3-re-s-disease
#11
Pauliana Lamounier, Thiago Silva Almeida de Souza, Debora Aparecida Gobbo, Fayez Bahmad
INTRODUCTION: Ménière's disease (MD) is an inner ear disorder characterized by episodic vertigo, tinnitus, ear fullness, and fluctuating hearing. Its diagnosis can be especially difficult in cases where vestibular symptoms are present in isolation (vestibular MD). The definitive diagnosis is made histologically and can only be performed post-mortem, after analysis of the temporal bone. Endolymphatic hydrops is a histopathological finding of the disease and occurs more often in the cochlea and saccule, followed by the utricle and semicircular canals...
June 2, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27385658/vestibular-migraine-screening-in-a-migraine-diagnosed-patient-population-and-assessment-of-vestibulocochlear-function
#12
U Yollu, D U Uluduz, M Yilmaz, H M Yener, F Akil, B Kuzu, E Kara, D Hayir, D Ceylan, N Korkut
OBJECTIVE: The primary aim of this study is to do a vestibular migraine scan in a population of patients with migraine diagnosis using the most recent standardized diagnosis criterion which is International Classification of Headache Disorders (ICHD) 3 Beta and to identify the epidemiological data. The second part of the study involves performing several vestibulocochlear tests on patients who received vestibular migraine (VM) diagnosis to collect data that may be important for diagnostic purposes by comparing the patients with normal population when necessary...
July 6, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27348133/is-dehydration-test-using-isosorbide-useful-in-meniere-s-disease
#13
Jong Dae Lee, Hyun Ji Kim, Jinsei Jung, Sung Huhn Kim, Bo Gyung Kim, Kyu-Sung Kim
CONCLUSION: The dehydration test using isosorbide is well tolerated when used to detect endolymphatic hydrops and may also be used to improve the sensitivity of ECoG performed on patients with MD, especially in poor hearing at low-frequency. OBJECTIVE: This prospective study was to explore the diagnostic utility of a dehydration test, administering oral isosorbide, which has been used to treat Meniere's disease (MD). METHOD: Electrocochleography (ECoG) and the dehydration test with isosorbide were performed on 32 patients diagnosed with definite diagnosed MD...
November 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27214832/outcomes-of-long-term-audiological-rehabilitation-in-charge-syndrome
#14
P Trevisi, A Ciorba, C Aimoni, R Bovo, A Martini
The aim of this paper is to assess the long-term audiological features and outcomes of hearing rehabilitation in a large group of individuals with CHARGE Syndrome. The study has been conducted retrospectively, on a paediatric patient database, at the Audiology Department of the University Hospitals of Ferrara and Padua. The study sample included 31 children presenting with different degrees of hearing impairment associated with CHARGE syndrome. Hearing was assessed using auditory brainstem responses (ABRs) and/or electrocochleography, or conditioned audiometry (visual reinforcement audiometry [VRA] or play audiometry)...
June 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/27170253/meniere-s-disease
#15
Tsutomu Nakashima, Ilmari Pyykkö, Megan A Arroll, Margaretha L Casselbrant, Carol A Foster, Nauman F Manzoor, Cliff A Megerian, Shinji Naganawa, Yi-Ho Young
Meniere's disease (MD) is a disorder of the inner ear that causes vertigo attacks, fluctuating hearing loss, tinnitus and aural fullness. The aetiology of MD is multifactorial. A characteristic sign of MD is endolymphatic hydrops (EH), a disorder in which excessive endolymph accumulates in the inner ear and causes damage to the ganglion cells. In most patients, the clinical symptoms of MD present after considerable accumulation of endolymph has occurred. However, some patients develop symptoms in the early stages of EH...
May 12, 2016: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/27121633/effect-of-coenzyme-a-on-outer-hair-cells-in-cisplatin-ototoxicity-functional-and-ultrastructural-study
#16
Francisco Fernández-Cervilla, María Martínez-Martínez, Eduardo Fernández-Segura, Francisco Javier Cañizares-García, Pascual Vicente Crespo-Ferrer
The aim of this study was to use functional and morphological analyses to evaluate the protective effect of coenzyme A (CoA) in cisplatin-induced toxicity in outer hair cells (OHC). Three groups of 8 guinea pigs were used: control (group I), cisplatin-treated (group II) and cisplatin + CoA-treated (group III). In groups II and III, a single ototoxic dose of cisplatin (10 mg/kg) was injected intraperitoneally. Group III was co-treated with CoA (900 μg/kg per day for 7 consecutive days). Electrocochleography (ECoG) recordings were made before and after the 7-day treatment period in all groups...
February 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/27050652/click-stimulus-electrocochleography-versus-mri-with-intratympanic-contrast-in-m%C3%A3-ni%C3%A3-re-s-disease-a-systematic-review
#17
Fuat Ziylan, Diederik P J Smeeing, Inge Stegeman, Hans G X M Thomeer
OBJECTIVE: To evaluate the diagnostic value of electrocochleography compared with magnetic resonance imaging (MRI) with intratympanic gadolinium administration to diagnose endolymphatic hydrops in patients with Ménière's disease. DATA SOURCES: An electronic search was performed in the PubMed, EMBASE, and Cochrane databases on September 15, 2015. A systematic search was conducted. Articles were included if written in English, Dutch, German, or French language. STUDY SELECTION: Original studies reporting on the diagnostic value of electrocochleography compared with MRI with intratympanic gadolinium administration, were included...
June 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/26968947/extra-tympanic-electrocochleography-in-a-normal-population-a-descriptive-study
#18
Jaume Redondo-Martínez, Antonio Morant-Ventura, Diana Robledo-Aguayo, Alejandra Ayas-Montero, Elvira Mencheta-Benet, Jaime Marco-Algarra
INTRODUCTION AND OBJECTIVES: Extra-tympanic electrocochleography is an electrophysiological register obtained after stimulating the cochlea with an audible stimulus. This stimulus is applied using an earphone over the external auditory canal, while the electrical activity is registered by surface electrodes. There are few studies that analyse normal electrocochleography in our environment. Thus, the main objective of our study was to regularize the values obtained with electrocochleography in ears without any otoneurological diseases...
September 2016: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/26963446/analysis-of-audio-vestibular-assessment-in-acute-low-tone-hearing-loss
#19
Gi Jung Im, Sung Kyun Kim, June Choi, Jae Jun Song, Sung Won Chae, Hak Hyun Jung
Conclusion This study demonstrated excellent hearing recovery following the combined treatment of diuretic and oral steroid, and electrocochleography (ECoG) was significantly higher than normal side. This study reports characteristics of acute low-tone hearing loss (ALHL) that show the greater low-tone hearing loss, the higher ECoG, and excellent recovery, even-though low-tone hearing loss is worse, which can be different compared with sudden deafness. Objective To analyze ALHL without vertigo, this study compared the ALHL group with all patients exhibiting low-tone hearing loss and ear fullness...
July 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/26945317/assessment-of-cochlear-trauma-during-cochlear-implantation-using-electrocochleography-and-cone-beam-computed-tomography
#20
Adrian Dalbert, Alexander Huber, Dorothe Veraguth, Christof Roosli, Flurin Pfiffner
OBJECTIVE: To assess cochlear trauma during cochlear implantation by electrocochleography (ECoG) and cone beam computed tomography (CBCT) and to correlate intraoperative cochlear trauma with postoperative loss of residual hearing. METHODS: ECoG recordings to tone bursts at 250, 500, 750, and 1000 Hz and click stimuli were recorded before and after insertion of the cochlear implant electrode array, using an extracochlear recording electrode. CBCTs were conducted within 6 weeks after surgery...
June 2016: Otology & Neurotology
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