keyword
https://read.qxmd.com/read/37621854/objective-evaluation-of-intracochlear-electrocochleography-repeatability-thresholds-and-tonotopic-patterns
#21
JOURNAL ARTICLE
Klaus Schuerch, Wilhelm Wimmer, Christian Rummel, Marco Domenico Caversaccio, Stefan Weder
INTRODUCTION: Intracochlear electrocochleography (ECochG) is increasingly being used to measure residual inner ear function in cochlear implant (CI) recipients. ECochG signals reflect the state of the inner ear and can be measured during implantation and post-operatively. The aim of our study was to apply an objective deep learning (DL)-based algorithm to assess the reproducibility of longitudinally recorded ECochG signals, compare them with audiometric hearing thresholds, and identify signal patterns and tonotopic behavior...
2023: Frontiers in Neurology
https://read.qxmd.com/read/37483448/assessment-of-cochlear-synaptopathy-by-electrocochleography-to-low-frequencies-in-a-preclinical-model-and-human-subjects
#22
JOURNAL ARTICLE
Raymond A Haggerty, Kendall A Hutson, William J Riggs, Kevin D Brown, Harold C Pillsbury, Oliver F Adunka, Craig A Buchman, Douglas C Fitzpatrick
Cochlear synaptopathy is the loss of synapses between the inner hair cells and the auditory nerve despite survival of sensory hair cells. The findings of extensive cochlear synaptopathy in animals after moderate noise exposures challenged the long-held view that hair cells are the cochlear elements most sensitive to insults that lead to hearing loss. However, cochlear synaptopathy has been difficult to identify in humans. We applied novel algorithms to determine hair cell and neural contributions to electrocochleographic (ECochG) recordings from the round window of animal and human subjects...
2023: Frontiers in Neurology
https://read.qxmd.com/read/37400265/diagnostic-role-of-combined-electrocochleography-and-pure-tone-audiometry-monitoring-during-dehydrating-test-in-m%C3%A3-ni%C3%A3-re-s-disease-a-case-series
#23
JOURNAL ARTICLE
Angelo Immordino, Federico Sireci, Francesco Lorusso, Rosario La Gumina, Calogero Montalbano, Mohamad Alfarghal, Palmira Immordino, Francesco Dispenza
OBJECTIVES: To evaluate the diagnostic role of combined electrocochleography and pure-tone audiometry monitoring during dehydrating test in Ménière's disease and consider its suitability as a diagnostic tool to differentiate those patients with unclear differential diagnosis and therefore identify those with clear endolymphatic hydrops responsive to dehydrating test. To study the efficacy of dehydrating therapy on vertiginous symptoms and hearing loss in patients with Ménière's disease...
July 1, 2023: Otology & Neurotology
https://read.qxmd.com/read/37306464/a-state-of-the-art-method-for-preserving-residual-hearing-during-cochlear-implant-surgery
#24
JOURNAL ARTICLE
Aarno Dietz, Pia Linder, Matti Iso-Mustajärvi
The developments in surgical techniques and cochlear implant (CI) electrode design have expanded the indications for CI treatment. Currently, patients with high-frequency hearing loss may benefit from CIs when low-frequency residual hearing can be preserved, as this enables combined electric-acoustic stimulation (EAS). The possible benefits of EAS include, for example, improved sound quality, music perception, and speech intelligibility in noise. The risks of inner ear trauma and a deterioration or even complete loss of residual hearing vary according to the surgical technique and the type of electrode array used...
May 26, 2023: Journal of Visualized Experiments: JoVE
https://read.qxmd.com/read/37267660/intracochlear-electrocochleography-findings-in-cochlear-implant-recipients-with-auditory-neuropathy-spectrum-disorder
#25
JOURNAL ARTICLE
Merve Bayri Ulukan, Ayca Ciprut
OBJECTIVES: This study aimed to compare intracochlear electrocochleography (ECochG) findings in a group of cochlear implant (CI) recipients with auditory neuropathy spectrum disorder (ANSD) with a group of CI recipients with sensorineural hearing loss (SNHL). Auditory outcome and spectral resolution findings were also compared among CI recipients with and without cochlear microphonic (CM) responses. METHODS: This single-center, prospective cohort study was undertaken at a tertiary referral center...
July 2023: International Journal of Pediatric Otorhinolaryngology
https://read.qxmd.com/read/37215732/case-report-bilateral-sudden-deafness-in-acute-middle-cerebellar-peduncle-infarction-central-or-peripheral
#26
Ziyun Yuan, Lei Xiang, Ran Liu, Wei Yue
BACKGROUND: The middle cerebellar peduncle (MCP) is the most common site associated with hearing impairment in acute ischaemic stroke. Narrowing or occlusion of the vertebrobasilar artery due to atherosclerosis is thought to be the main pathogenesis of MCP infarction. Most previous reports of MCP infarction have not been clear whether the patient's hearing impairment is localized to the center or periphery. CASE PRESENTATION: We report 44-year-old man with vertigo, tinnitus, and bilateral sudden sensorineural hearing loss (SSNHL) as the first symptoms...
2023: Frontiers in Medicine
https://read.qxmd.com/read/37195836/real-time-feature-extraction-from-electrocochleography-with-impedance-measurements-during-cochlear-implantation-using-linear-state-space-models
#27
JOURNAL ARTICLE
Raphael R Andonie, Wilhelm Wimmer, Reto A Wildhaber, Marco Caversaccio, Stefan Weder
Electrocochleography (ECochG) is increasingly used to monitor the inner ear function of cochlear implant (CI) patients during surgery. Current ECochG-based trauma detection shows low sensitivity and specificity and depends on visual analysis by experts. Trauma detection could be improved by including electric impedance data recorded simultaneously with the ECochG. However, combined recordings are rarely used because the impedance measurements produce artifacts in the ECochG. In this study, we propose a framework for automated real-time analysis of intraoperative ECochG signals using Autonomous Linear State-Space Models (ALSSMs)...
May 17, 2023: IEEE Transactions on Bio-medical Engineering
https://read.qxmd.com/read/36964094/intraoperative-cochlear-nerve-monitoring-in-vestibular-schwannoma-microsurgery
#28
REVIEW
Kevin Y Zhan, Cameron C Wick
Monitoring the cochlear nerve during vestibular schwannoma (VS) microsurgery depends on the hearing status and surgical approach. Traditional hearing preservation VS microsurgery relies on acoustically driven auditory brainstem response (ABR) and cochlear nerve action potential. Both modalities have advantages and disadvantages that need to be understood for proper implementation. When hearing is lost or the approach violates the otic capsule, electrically evoked monitoring methods may be used. Evoked ABR (eABR) is feasible and safe but may be limited by artifact...
June 2023: Otolaryngologic Clinics of North America
https://read.qxmd.com/read/36949075/an-intracochlear-electrocochleography-dataset-from-raw-data-to-objective-analysis-using-deep-learning
#29
JOURNAL ARTICLE
Klaus Schuerch, Wilhelm Wimmer, Adrian Dalbert, Christian Rummel, Marco Caversaccio, Georgios Mantokoudis, Tom Gawliczek, Stefan Weder
Electrocochleography (ECochG) measures electrophysiological inner ear potentials in response to acoustic stimulation. These potentials reflect the state of the inner ear and provide important information about its residual function. For cochlear implant (CI) recipients, we can measure ECochG signals directly within the cochlea using the implant electrode. We are able to perform these recordings during and at any point after implantation. However, the analysis and interpretation of ECochG signals are not trivial...
March 22, 2023: Scientific Data
https://read.qxmd.com/read/36935398/characteristics-of-the-summating-potential-measured-across-a-cochlear-implant-array-as-an-indicator-of-cochlear-function
#30
JOURNAL ARTICLE
Jared Panario, Christofer Bester, Stephen John O'Leary
OBJECTIVES: The underlying state of cochlear and neural tissue function is known to affect postoperative speech perception following cochlear implantation. The ability to assess these tissues in patients can be performed using intracochlear electrocochleography (IC ECochG). One component of ECochG is the summating potential (SP) that appears to be generated by multiple cochlear tissues. Its qualities may be able to detect the presence of functional inner hair cells, but evidence for this is limited in human cochleae...
March 20, 2023: Ear and Hearing
https://read.qxmd.com/read/36858988/isolating-auditory-nerve-contributions-to-electrocochleography-by-high-pass-filtering-a-better-biomarker-for-cochlear-nerve-degeneration
#31
JOURNAL ARTICLE
Viacheslav Vasilkov, M Charles Liberman, Stéphane F Maison
In search of biomarkers for cochlear neural degeneration (CND) in electrocochleography from humans with normal thresholds, we high-pass and low-pass filtered the responses to separate contributions of auditory-nerve action potentials (N1 ) from hair-cell summating potentials (SP). The new N1 measure is better correlated with performance on difficult word-recognition tasks used as a proxy for CND. Furthermore, the paradoxical correlation between larger SPs and worse word scores, observed with classic electrocochleographic analysis, disappears with the new metric...
February 2023: JASA express letters
https://read.qxmd.com/read/36845413/acute-effects-of-cochleostomy-and-electrode-array-insertion-on-compound-action-potentials-in-normal-hearing-guinea-pigs
#32
JOURNAL ARTICLE
Saad Jwair, Dyan Ramekers, Hans G X M Thomeer, Huib Versnel
INTRODUCTION: Electrocochleography (ECochG) is increasingly used in cochlear implant (CI) surgery, in order to monitor the effect of insertion of the electrode array aiming to preserve residual hearing. However, obtained results are often difficult to interpret. Here we aim to relate changes in ECochG responses to acute trauma induced by different stages of cochlear implantation by performing ECochG at multiple time points during the procedure in normal-hearing guinea pigs. MATERIALS AND METHODS: Eleven normal-hearing guinea pigs received a gold-ball electrode that was fixed in the round-window niche...
2023: Frontiers in Neuroscience
https://read.qxmd.com/read/36831873/multi-frequency-electrocochleography-and-electrode-scan-to-identify-electrode-insertion-trauma-during-cochlear-implantation
#33
JOURNAL ARTICLE
Aniket A Saoji, Madison K Graham, Weston J Adkins, Kanthaiah Koka, Matthew L Carlson, Brian A Neff, Colin L W Driscoll, Douglas C Fitzpatrick
Intraoperative electrocochleography (ECOG) is performed using a single low-frequency acoustic stimulus (e.g., 500 Hz) to monitor cochlear microphonics (CM) during cochlear implant (CI) electrode insertion. A decrease in CM amplitude is commonly associated with cochlear trauma and is used to guide electrode placement. However, advancement of the recording electrode beyond the sites of CM generation can also lead to a decrease in CM amplitude and is sometimes interpreted as cochlear trauma, resulting in unnecessary electrode manipulation and increased risk of cochlear trauma during CI electrode placement...
February 15, 2023: Brain Sciences
https://read.qxmd.com/read/36806472/detailed-clinical-characteristics-and-its-correlation-with-the-diagnostic-test-results-in-patients-with-defined-mnire-apos-s-disease
#34
JOURNAL ARTICLE
Agnieszka Jasińska-Nowacka, Magdalena Lachowska, Kazimierz Niemczyk
INTRODUCTION: Mnire's disease is characterized by vertigo episodes with nausea and vomiting accompanied by aural symptoms. Diagnosis is based on clinical manifestation and sensorineural hearing loss confirmed in pure tone audiometry. AIM: The purpose was to evaluate clinical features and audiological and vestibular tests in patients with definite Mnire's disease. MATERIAL AND METHODS: Seventy patients were enrolled in this study...
February 20, 2023: Otolaryngologia Polska
https://read.qxmd.com/read/36795197/minimum-detectable-differences-in-electrocochleography-measurements-bayesian-based-predictions
#35
JOURNAL ARTICLE
Shawn S Goodman, Jeffery T Lichtenhan, Skyler G Jennings
Physiology of the cochlea and auditory nerve can be assessed with electrocochleography (ECochG), a technique that involves measuring auditory evoked potentials from an electrode placed near or within the cochlea. Research, clinical, and operating room applications of ECochG have in part centered on measuring the auditory nerve compound action potential (AP) amplitude, the summating potential (SP) amplitude, and the ratio of the two (SP/AP). Despite the common use of ECochG, the variability of repeated amplitude measurements for individuals and groups is not well understood...
February 16, 2023: Journal of the Association for Research in Otolaryngology: JARO
https://read.qxmd.com/read/36790447/longitudinal-electrocochleography-as-an-objective-measure-of-serial-behavioral-audiometry-in-electro-acoustic-stimulation-patients
#36
JOURNAL ARTICLE
Viral D Tejani, Jeong-Seo Kim, Christine P Etler, Jeffrey Skidmore, Yi Yuan, Shuman He, Marlan R Hansen, Bruce J Gantz, Paul J Abbas, Carolyn J Brown
OBJECTIVE: Minimally traumatic surgical techniques and advances in cochlear implant (CI) electrode array designs have allowed acoustic hearing present in a CI candidate prior to surgery to be preserved postoperatively. As a result, these patients benefit from combined electric-acoustic stimulation (EAS) postoperatively. However, 30% to 40% of EAS CI users experience a partial loss of hearing up to 30 dB after surgery. This additional hearing loss is generally not severe enough to preclude use of acoustic amplification; however, it can still impact EAS benefits...
February 15, 2023: Ear and Hearing
https://read.qxmd.com/read/36768827/functional-and-molecular-markers-for-hearing-loss-and-vertigo-attacks-in-meniere-s-disease
#37
REVIEW
Chao-Hui Yang, Ming-Yu Yang, Chung-Feng Hwang, Kuang-Hsu Lien
Meniere's disease (MD) is one of the most complicated diseases in the otologic clinic. The complexity of MD is partially due to the multifactorial etiological mechanisms and the heterogenous symptoms, including episodic vertigo, hearing loss, aural fullness and tinnitus. As a result, the diagnosis of MD and differentiating MD from other diseases with similar symptoms, such as vestibular migraine (VM), is challenging. In addition, it is difficult to predict the progression of hearing loss and the frequency of vertigo attacks...
January 28, 2023: International Journal of Molecular Sciences
https://read.qxmd.com/read/36742890/effect-of-glycerol-administration-on-ecochg-and-vemp-findings-in-individual-with-meniere-s-disease
#38
JOURNAL ARTICLE
Pooja Nagarajan, Muthu Selvi Thangaraj
The present study aimed to find the effect of glycerol administration on Electrocochleography (ECochG), cervical and ocular Vestibular Evoked Myogenic Potential (c-VEMP, o-VEMP) findings in individual with Meniere's disease. Sixteen participants (32 ears) diagnosed with Meniere's disease underwent ECochG, c-VEMP and o-VEMP for both pre and 1 h post-glycerol administration. Paired t-test indicated that the SP/AP ratio of ECochG measures was significantly improved with post-glycerol administration. There was no significant difference in the mean amplitude of o-VEMP and c-VEMP between pre and post-glycerol administration...
December 2022: Indian Journal of Otolaryngology and Head and Neck Surgery
https://read.qxmd.com/read/36648923/vestibular-migraine-versus-m%C3%A3-niere-s-disease-diagnostic-utility-of-electrocochleography
#39
JOURNAL ARTICLE
Paul Tabet, Ahlem Elblidi, Issam Saliba
Objectives: The diagnostic criteria for vestibular migraine (VM) and Méniere’s disease (MD) present an important overlap, which leads to a difficult diagnosis in patients presenting with headache, vertigo, hearing loss, ear fullness, and tinnitus. The objective of our study is to determine whether the area-under-the-curve ratio of the summating potentials (SP) and action potentials (AP) curves on electrocochleography (ECoG) helps differentiate VM from MD with or without the use of the well-established clinical criteria...
December 26, 2022: Audiology Research
https://read.qxmd.com/read/36570833/lack-of-neural-contributions-to-the-summating-potential-in-humans-with-meniere-s-disease
#40
JOURNAL ARTICLE
William J Riggs, Tatyana E Fontenot, Meghan M Hiss, Varun Varadarajan, Aaron C Moberly, Oliver F Adunka, Douglas C Fitzpatrick
OBJECTIVE: To investigate the electrophysiology of the cochlear summating potential (SP) in patients with Meniere's disease (MD). Although long considered a purely hair cell potential, recent studies show a neural contribution to the SP. Patients with MD have an enhanced SP compared to those without the disease. Consequently, this study was to determine if the enhancement of the SP was in whole or part due to neural dysfunction. DESIGN: Study participants included 41 adults with MD and 53 subjects with auditory neuropathy spectrum disorder (ANSD), undergoing surgery where the round window was accessible...
2022: Frontiers in Neuroscience
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