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Endolymphatic hydrops

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https://www.readbyqxmd.com/read/29135874/meni%C3%A3-re-and-friends-imaging-and-classification-of-hydropic-ear-disease
#1
Robert Gürkov
BACKGROUND: Over 75 years ago, endolymphatic hydrops was discovered as the pathologic correlate of Menière's disease. However, this pathologic finding could be ascertained only in postmortem histologic studies. Due to this diagnostic dilemma and the variable manifestation of the various audiovestibular symptoms, diagnostic classification systems based on clinical findings have been used hitherto. METHODS: A review of the literature of magnetic resonance (MR) imaging of hydropic ear disease...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29105767/the-relationship-between-endolymphatic-hydrops-in-the-vestibule-and-low-frequency-air-bone-gaps
#2
Satofumi Sugimoto, Tadao Yoshida, Masaaki Teranishi, Yuriko Okazaki, Shinji Naganawa, Michihiko Sone
OBJECTIVES/HYPOTHESIS: To investigate the relationship between endolymphatic hydrops and hearing level, focusing on significant vestibular endolymphatic hydrops adjacent to the stapes footplate and low-frequency air-bone gaps. STUDY DESIGN: Retrospective study. METHODS: The study included 1,548 ears from 775 patients who underwent magnetic resonance imaging examination in our university hospital to investigate possible endolymphatic hydrops between January 2012 and December 2015...
November 6, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29099441/mastoid-and-inner-ear-measurements-in-patients-with-meni%C3%A3-re-s-disease
#3
Eric M Sugihara, Alexander L Marinica, Nathan D Vandjelovic, Benjamin M Kelley, Said S Sana, Nicholas E Starkey, Seilesh C Babu
OBJECTIVE: To determine the relationship between radiographic temporal bone anatomy of patients with Menière's disease in medically and surgically managed populations versus controls. STUDY DESIGN: Retrospective chart review. SETTING: Two tertiary referral centers. PATIENTS: Adults older than 18 years with Menière's disease treated with endolymphatic sac decompression (ESD) or medical management (non-ESD) versus controls...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29082086/elhnet-a-convolutional-neural-network-for-classifying-cochlear-endolymphatic-hydrops-imaged-with-optical-coherence-tomography
#4
George S Liu, Michael H Zhu, Jinkyung Kim, Patrick Raphael, Brian E Applegate, John S Oghalai
Detection of endolymphatic hydrops is important for diagnosing Meniere's disease, and can be performed non-invasively using optical coherence tomography (OCT) in animal models as well as potentially in the clinic. Here, we developed ELHnet, a convolutional neural network to classify endolymphatic hydrops in a mouse model using learned features from OCT images of mice cochleae. We trained ELHnet on 2159 training and validation images from 17 mice, using only the image pixels and observer-determined labels of endolymphatic hydrops as the inputs...
October 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29080146/use-of-narrow-band-imaging-and-4k-technology-in-otology-and-neuro-otology-preliminary-experience-and-feasibility-study
#5
Henry Zhang, Phui Yee Wong, Tiarnan Magos, Jabin Thaj, Gaurav Kumar
The advent of the endoscope has facilitated otological surgery in recent years. Advances in optical technology have led to the development of high definition visualisation, such as 4K magnification. Narrow band imaging (NBI) has been shown to improve visualisation of tissue based on varying degrees of vascularity. This is a feasibility study, the first of its kind, aiming to investigate the appearances of middle ear anatomy and pathology (tympanic membrane, tympanosclerosis, cholesteatoma, granulation, endolymphatic sac hydrops, otosclerosis) under the NBI filter, using a high definition 4K endoscope...
October 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29056463/a-high-jugular-bulb-and-poor-development-of-perivestibular-aqueductal-air-cells-are-not-the-cause-of-endolymphatic-hydrops-in-patients-with-m%C3%A3-ni%C3%A3-re-s-disease
#6
Ryohei Oya, Takao Imai, Takashi Sato, Atsuhiko Uno, Yoshiyuki Watanabe, Suzuyo Okazaki, Yumi Ohta, Tadashi Kitahara, Arata Horii, Hidenori Inohara
OBJECTIVE: The presence of endolymphatic hydrops in the inner ear, which can be detected with gadolinium-enhanced magnetic resonance imaging (Gd-MRI), is widely recognized as the main pathological cause of Ménière's disease (MD). However, the precise mechanisms underlying the development of endolymphatic hydrops remains unclear. One hypothesis proposes a relationship between the presence of a high jugular bulb (HJB) and MD, which disrupts the vestibular aqueduct leading to the development of endolymphatic hydrops...
October 19, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28984808/cochlear-dysfunction-is-not-common-in-human-meningioma-of-the-internal-auditory-canal
#7
Lukas D Landegger, Jong D Lee, Fred H Linthicum, Konstantina M Stankovic
HYPOTHESIS: Cochlear dysfunction is not common in human meningioma of the internal auditory canal. BACKGROUND: Meningiomas arising from the cerebellopontine angle and internal auditory canal typically cause hearing loss. Cochlear dysfunction is known to contribute to sensorineural hearing loss induced by vestibular schwannoma, the most common tumor of the internal auditory canal. Detailed cochlear histopathology in meningioma has not been reported. METHODS: Retrospective analysis of cochlear histopathology in five unoperated and five operated meningiomas of the internal auditory canal identified after screening human temporal bone collections from three academic medical centers...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28984802/vestibular-function-change-in-a-vasopressin-induced-hydrops-model
#8
Minbum Kim, Kyu-Sung Kim
HYPOTHESIS: A vasopressin-induced endoymphatic hydrops model can represent an acute vertiginous attack in Menière's disease (MD). BACKGROUND: Previous animal models are not appropriate to evaluate the efficacy of new treatments for hydrops because they cannot represent an acute attack of MD. Recently, a new dynamic model was introduced for acute hydrops exacerbation using the vasopressin type 2 receptor agonist, desmopressin (1-deamino-8-D-Arginine vasopressin, VP); however, resulting changes in vestibular function have not been investigated...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28969854/mri-in-otology-applications-in-cholesteatoma-and-m%C3%A3-ni%C3%A3-re-s-disease
#9
REVIEW
R K Lingam, S E J Connor, J W Casselman, T Beale
Imaging of middle-ear cholesteatoma with diffusion-weighted imaging (DWI) magnetic resonance imaging (MRI), and inner-ear endolymphatic hydrops (in Ménière's disease) with post-gadolinium high-resolution MRI, are reviewed. DWI MRI provides for a more specific diagnosis of tympano-mastoid cholesteatoma. There is an established and increasing role of DWI MRI in detecting both primary and postoperative cholesteatoma, localising disease, and planning surgery. The contemporary diagnostic accuracy of DWI is reviewed, pitfalls in interpretation are described, and potential future developments are highlighted...
September 29, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28951962/saccular-measurements-in-routine-mri-can-predict-hydrops-in-meni%C3%A3-re-s-disease
#10
François Simon, Jean-Pierre Guichard, Romain Kania, Julie Franc, Philippe Herman, Charlotte Hautefort
Most patients with suspicion of hydrops do not have access to MRI with 3D reconstruction of the endolymphatic space. Our main objective was to show that measurements of the saccule on a non-enhanced 3D-T2 MRI could show hydrops and help diagnose Menière disease. We conducted a prospective study from 2015 to 2016 to compare consecutive patients consulting for Menière's disease to a control group (patients with unilateral non-hydrops disorders and contralateral healthy ears). They all received full auditory and vestibular testing...
December 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28948373/evaluation-of-endolymphatic-hydrops-using-3-t-mri-after-intravenous-gadolinium-injection
#11
Takao Imai, Atsuhiko Uno, Tadashi Kitahara, Tomoko Okumura, Arata Horii, Yumi Ohta, Takashi Sato, Suzuyo Okazaki, Takefumi Kamakura, Yoshiyuki Ozono, Yoshiyuki Watanabe, Yukiko Hanada, Ryusuke Imai, Kazuya Ohata, Hidenori Inohara
Aim of this work is to establish evaluation criteria for identifying endolymphatic hydrops in the vestibule and cochlea using a magnetic resonance imaging (MRI) scanner. This is a retrospective diagnostic study. We evaluated 70 ears of 35 unilateral Ménière's disease patients. We performed 3-T MRI 4 h after intravenous gadolinium injection. Otologists manually traced the outline of vestibule, cochlea, and endolymphatic space of the vestibule and cochlea on two-dimensional fluid-attenuated inversion-recovery (2D-FLAIR) images...
December 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28811849/meniere-s-disease-and-vestibular-migraine-updates-and-review-of-the-literature
#12
REVIEW
Paul Tabet, Issam Saliba
The diagnosis of Meniere's disease (MD) and vestibular migraine (VM) is primarily based on clinical criteria and their differentiation is often difficult. Currently, there are no known definitive diagnostic tests that can reliably distinguish the two conditions. Patients with MD and patients with VM are treated differently, therefore improving the diagnosis of these two pathologies should avoid errors in management. A systematic review was conducted according to PRISMA guidelines. Medline-Ovid and Embase databases were used to conduct a thorough search of English-language publications dating from 1948 to March 2016...
September 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28769744/the-auditory-nerve-overlapped-waveform-anow-detects-small-endolymphatic-manipulations-that-may-go-undetected-by-conventional-measurements
#13
Jeffery T Lichtenhan, Choongheon Lee, Farah Dubaybo, Kaitlyn A Wenrich, Uzma S Wilson
Electrocochleography (ECochG) has been used to assess Ménière's disease, a pathology associated with endolymphatic hydrops and low-frequency sensorineural hearing loss. However, the current ECochG techniques are limited for use at high-frequencies only (≥1 kHz) and cannot be used to assess and understand the low-frequency sensorineural hearing loss in ears with Ménière's disease. In the current study, we use a relatively new ECochG technique to make measurements that originate from afferent auditory nerve fibers in the apical half of the cochlear spiral to assess effects of endolymphatic hydrops in guinea pig ears...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28749204/revision-of-a-furosemide-loading-vestibular-evoked-myogenic-potential-protocol-for-detecting-endolymphatic-hydrops
#14
Toru Seo, Ko Shiraishi, Takaaki Kobayashi, Kitano Mutsukazu, Takeshi Fujita, Kazuya Saito, Katsumi Doi
OBJECTIVE: The presence of endolymphatic hydrops can be suggested by improving the amplitude of vestibular-evoked myogenic potential (VEMP) after furosemide administration (furosemide loading VEMP [FVEMP]). The authors aimed to determine a stimulation frequency and judgment criteria to ascertain whether a revised FVEMP protocol can be applied to clinical settings. METHODS: The study included 25 individuals with unilateral Meniere's disease (MD) and 11 normal healthy volunteers...
July 27, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28708796/significance-of-endolymphatic-hydrops-in-ears-with-unilateral-sensorineural-hearing-loss
#15
Yuriko Okazaki, Tadao Yoshida, Satofumi Sugimoto, Masaaki Teranishi, Ken Kato, Shinji Naganawa, Michihiko Sone
OBJECTIVE: The purpose of this study was to investigate the existence of endolymphatic hydrops (EH) in affected and unaffected ears in patients with unilateral sensorineural hearing loss (SNHL) using contrast-enhanced magnetic resonance imaging (MRI), and to evaluate the significance of EH in various otological diseases. STUDY DESIGN: Retrospective study. SETTING: University hospital. METHODS: One hundred eighty-two ears from 91 patients with unilateral SNHL were studied...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28704892/is-electrocochleography-still-helpful-in-early-diagnosis-of-meniere-disease
#16
Fulvio Mammarella, Melissa Zelli, Theodoros Varakliotis, Alberto Eibenstein, Claudio Maria Pianura, Gianluca Bellocchi
BACKGROUND AND OBJECTIVES: Despite the extensive research for the Meniere's disease (MD), it's pathophysiology still remains uncertain and questionable among scientists. Clinical symptoms and audiometric tests form the basis for the diagnosis. Nevertheless the differential diagnosis can be extremely challenging, due to subjective and not specific results. Incorrect diagnosis is most likely and for this reason there is a great demand for objective and reliable tests. SUBJECTS AND METHODS: The presence of endolymphatic hydrops is necessary condition but non enough for the diagnosis...
July 2017: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/28687821/computer-aided-detection-and-quantification-of-endolymphatic-hydrops-within-the-mouse-cochlea-in-vivo-using-optical-coherence-tomography
#17
George S Liu, Jinkyung Kim, Brian E Applegate, John S Oghalai
Diseases that cause hearing loss and/or vertigo in humans such as Meniere’s disease are often studied using animal models. The volume of endolymph within the inner ear varies with these diseases. Here, we used a mouse model of increased endolymph volume, endolymphatic hydrops, to develop a computer-aided objective approach to measure endolymph volume from images collected <italic<in vivo</italic< using optical coherence tomography. The displacement of Reissner’s membrane from its normal position was measured in cochlear cross sections...
July 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28686071/contralateral-type-of-delayed-endolymphatic-hydrops-may-consist-of-two-phenotypes-based-on-a-magnetic-resonance-imaging-preliminary-study
#18
Munehisa Fukushima, Kei Yokoi, Junpei Iga, Shiro Akahani, Hidenori Inohara, Noriaki Takeda
OBJECTIVE: This study was performed to determine the volume distribution of EH in contralateral DEH. PATIENTS AND METHODS: Five contralateral DEH patients (age range = 21-77 years) and one ipsilateral DEH patient. Visualization of in vivo EH using 3T magnetic resonance (MR) imaging was performed by intravenous administration of gadolinium. The EH volume was determined quantitatively by adding the area of EH in consecutive MR images. RESULTS: The total EH volume of the patients with contralateral DEH varied from 24...
July 7, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28671918/a-comparison-of-distortion-product-otoacoustic-emission-properties-in-m%C3%A3-ni%C3%A3-re-s-disease-patients-and-normal-hearing-participants
#19
Markus Drexl, Eike Krause, Robert Gürkov
OBJECTIVES: Postmortem examination of temporal bones of Ménière's disease patients consistently show dilated endolymphatic spaces of the inner ear, for which the term endolymphatic hydrops has been coined. During the past decade, magnetic resonance imaging techniques for the inner ear appeared, advancing the diagnosis of Ménière's disease. They require, however, a field-strength of at least 3 T, are costly and not universally available. Alternative, noninvasive, cost-effective tests with high sensitivity and specifity for endolymphatic hydrops are desirable...
June 30, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28670263/tone-burst-electrocochleography-for-the-diagnosis-of-clinically-certain-meniere-s-disease
#20
REVIEW
Jeremy Hornibrook
The technique of transtympanic electrocochleography was initially developed as an objective hearing threshold test by Eggermont. Gibson et al. (1977) claimed that an enlarged direct current component of the action potential (AP) called the summating potential (SP) is an indication of endolymphatic hydrops, later confirmed by Coates who proposed an SP/AP ratio measure. This led to numerous publications using diagnostic ratios of 0.33-0.35. The insensitivity led to an eventual disenchantment with the test as a reliable objective test for Meniere's disease...
2017: Frontiers in Neuroscience
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