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https://www.readbyqxmd.com/read/28324012/deletion-of-the-thyroid-hormone-activating-type-2-deiodinase-rescues-cone-photoreceptor-degeneration-but-not-deafness-in-mice-lacking-type-3-deiodinase
#1
Lily Ng, Hong Liu, Donald L St Germain, Arturo Hernandez, Douglas Forrest
Type 2 deiodinase amplifies and type 3 deiodinase depletes levels of the active form of thyroid hormone, triiodothyronine (T3). Given the opposing activities of these enzymes, we tested the hypothesis that they counteract each other's developmental functions by investigating whether deletion of type 2 deiodinase (encoded by Dio2) modifies sensory phenotypes in type 3 deiodinase-deficient (Dio3-/-) mice. Dio3-/- mice display degeneration of retinal cones, the photoreceptors that mediate daylight and color vision...
March 7, 2017: Endocrinology
https://www.readbyqxmd.com/read/28318969/auditory-perceptual-evaluation-of-voice-quality-of-cochlear-implanted-and-normal-hearing-individuals-a-reliability-study
#2
Ana Cristina Coelho, Alcione Ghedini Brasolotto, Ana Carolina Nascimento Fernandes, Daniela Malta de Souza Medved, Eduardo Magalhães da Silva, Fayez Bahmad Júnior
OBJECTIVE: This study aimed to present an experience in rating voices of adults with normal hearing and adults with cochlear implants and critically examine the outcomes, discussing pros and cons of the methodology used. STUDY DESIGN: This is a cross-sectional, prospective study. METHODS: One hundred and fifty voice samples, consisting of 50 sustained vowels, 50 samples of connected speech, and 50 samples of conversational speech, belonging to 25 adults with hearing impairment with cochlear implants and 25 adults with normal hearing, were perceptually analyzed for inter-rater agreement and intra-rater reliability...
March 16, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28318810/incomplete-partition-type-iii-a-rare-and-difficult-cochlear-implant-surgical-indication
#3
Levent Sennaroğlu, Münir Demir Bajin
OBJECTIVE: Presenting the clinical features and treatment options for incomplete partition type-III. METHODS: Nine primary and 1 revision incomplete partition type-III cochlear implant cases treated between 2004 and 2015 in Hacettepe University Department of Otolaryngology were included in the study. Treatment options and particularly cochlear implantation tecnique were described. RESULTS: Nine primary and 1 revison cases were all succesfully implanted...
March 16, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28317336/a-novel-radiologic-check-test-of-round-window-accessibility-for-cochlear-implantation-our-experience-in-198-cases
#4
Mahmoud F Mandour, Mohammed Adel Khalifa, Hossam M Adel Khalifa, Mohammed Tomoum
Clear visualization of the round window niche (RWN) and round window membrane (RWM) through the facial recess using standard posterior tympanotomy approach is a prime requisite for the surgeon. Moreover, even with the traditional cochleostomy approach, proper identification of RWN is essential for accurate localization of promontory cochleostomy site. (1) This article is protected by copyright. All rights reserved.
March 20, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28317321/development-of-a-home-based-auditory-training-to-improve-speech-recognition-on-the-telephone-for-patients-with-cochlear-implants-a-randomized-trial
#5
Friedrich Ihler, Jenny Blum, Gino Steinmetz, Bernhard G Weiss, Stefan Zirn, Martin Canis
OBJECTIVES: Speech recognition on the telephone poses a challenge for patients with cochlear implants due to a reduced bandwidth of transmission. This trial evaluates a home-based auditory training with telephone-specific filtered speech material to improve sentence recognition. DESIGN: Randomized controlled parallel double-blind. SETTING: One tertiary referral center. PARTICIPANTS: 20 postlingually deafened patients with cochlear implants...
March 20, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28316289/post-stapedectomy-granuloma-a-devastating-complication
#6
E Watts, H R F Powell, S R Saeed, R M Irving
OBJECTIVES: This paper reports three cases of severe post-stapedectomy granuloma, emphasising the variable presentation of this devastating complication and the challenges of its management. METHODS: A retrospective review was conducted of three cases of post-stapedectomy granuloma requiring surgical debulking between 2010 and 2015. Clinical symptoms, serial imaging, histopathology and post-operative outcomes were considered. RESULTS: Intra-operatively, extensive granulation tissue with erosion of the otic capsule was found...
March 20, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28315206/otorhinolaryngological-toxicities-of-new-drugs-in-oncology
#7
REVIEW
Dana M Hartl, Daphné Morel, Erika Saavedra, Christophe Massard, Alessandra Rinaldo, Nabil F Saba, Alfio Ferlito, Jean-Charles Soria
Many new or relatively new cancer drugs-personalized anticancer agents-have been approved for use in various clinical settings in oncology or are still under evaluation in clinical trials. Targeted therapies as well as new immune checkpoint blockers have toxicity profiles that differ from conventional cytotoxic chemotherapy, and many can cause adverse effects that affect the mouth and pharynx, the nasal cavities, and the larynx. This review aims to provide an overview of current knowledge concerning these side effects and contemporary management...
March 17, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28306651/predicting-auditory-outcomes-from-radiological-imaging-in-cochlear-implant-patients-with-cochlear-nerve-deficiency
#8
Xingmei Wei, Yongxin Li, Biao Chen, Yue Gong, Qian-Jie Fu, Ting Liu, Danmo Cui, Qiaotong Su, Ying Shi
OBJECTIVE: To compare imaging and outcome data in cochlear implant (CI) patients with and without cochlear nerve deficiency (CND). STUDY DESIGN: Retrospective study comparing presurgical imaging (via high-resolution computed tomography and three-dimensional magnetic resonance imaging) to postsurgical auditory outcomes in CI patients with and without CND. PATIENTS: Forty-three CI patients with CND diagnosed according to preoperative imaging were included in the CND group...
March 16, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28306650/cochlear-transcriptome-following-acoustic-trauma-and-dexamethasone-administration-identified-by-a-combination-of-rna-seq-and-dna-microarray
#9
Yukihide Maeda, Ryotaro Omichi, Akiko Sugaya, Shin Kariya, Kazunori Nishizaki
AIM: To elucidate molecular mechanisms of noise-induced hearing loss (NIHL) and glucocorticoid therapy in the cochlea. BACKGROUND: Glucocorticoids are used to treat many forms of acute sensorineural hearing loss, but their molecular action in the cochlea remains poorly understood. METHODS: Dexamethasone was administered intraperitoneally immediately following acoustic overstimulation at 120 dB SPL for 2 hours to mice. The whole cochlear transcriptome was analyzed 12 and 24 hours following noise trauma and dexamethasone administration by both next-generation sequencing (RNA-seq) and DNA microarray...
March 16, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28306649/secondary-endolymphatic-hydrops
#10
Ashley P O'Connell Ferster, Sebahattin Cureoglu, Nevra Keskin, Michael M Paparella, Huseyin Isildak
HYPOTHESIS: A review of the most recent literature will provide clinicians with an update of secondary endolymphatic hydrops, aiding in diagnosis and treatment of affected patients. BACKGROUND: Secondary endolymphatic hydrops is a pathologic finding of the inner ear resulting in episodic vertigo and intermittent hearing loss. It is a finding for which extensive research is being performed. METHODS: A review of the most recent literature on secondary endolymphatic hydrops was performed using PubMed literature search...
March 16, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28304096/insertion-depth-impacts-speech-perception-and-hearing-preservation-for-lateral-wall-electrodes
#11
Brendan P O'Connell, Jacob B Hunter, David S Haynes, Jourdan T Holder, Matt M Dedmon, Jack H Noble, Benoit M Dawant, George B Wanna
OBJECTIVES: 1) Examine angular insertion depths (AID) and scalar location of Med-El (GmbH Innsbruck, Austria) electrodes; and 2) determine the relationship between AID and audiologic outcomes controlling for scalar position. STUDY DESIGN: Retrospective review. METHODS: Postlingually deafened adults undergoing cochlear implantation with Flex 24, Flex 28, and Standard electrode arrays (Med-El) were identified. Patients with preoperative and postoperative computed tomography scans were included so that electrode location and AID could be determined...
March 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28304075/steroid-intracochlear-distribution-differs-by-administration-method-systemic-versus-intratympanic-injection
#12
Jong Joo Lee, Jeong Hun Jang, Oak-Sung Choo, Hye Jin Lim, Yun-Hoon Choung
OBJECTIVE: Steroids have been widely used to treat inner-ear diseases such as sudden sensorineural hearing loss, tinnitus, and Meniere's disease. They can be given via either systemic or intratympanic (IT) injection. The purpose of the present study was to explore differences in intracochlear steroid distribution by the administration method employed (systemic vs. IT injection). STUDY DESIGN: Animal study. METHODS: Twenty-three Sprague-Dawley rats were given fluorescein isothiocyanate-labeled dexamethasone (FITC-DEX) three times (on successive days) via intraperitoneal (IP) or IT injection...
March 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28303412/auditory-enhancement-in-cochlear-implant-users-under-simultaneous-and-forward-masking
#13
Heather A Kreft, Andrew J Oxenham
Auditory enhancement is the phenomenon whereby the salience or detectability of a target sound within a masker is enhanced by the prior presentation of the masker alone. Enhancement has been demonstrated using both simultaneous and forward masking in normal-hearing listeners and may play an important role in auditory and speech perception within complex and time-varying acoustic environments. The few studies of enhancement in hearing-impaired listeners have reported reduced or absent enhancement effects under forward masking, suggesting a potentially peripheral locus of the effect...
March 16, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28303288/-technical-advancements-in-cochlear-implants-state-of-the-art
#14
A Büchner, L Gärtner
Twenty years ago, cochlear implants (CI) were indicated only in cases of profound hearing loss or complete deafness. While from today's perspective the technology was clumsy and provided patients with only limited speech comprehension in quiet scenarios, successive advances in CI technology and the consequent substantial hearing improvements over time have since then resulted in continuous relaxation of indication criteria toward residual hearing. While achievements in implant and processor electronics have been one key factor for the ever-improving hearing performance, development of electro-acoustic CI systems-together with atraumatic implantation concepts-has led to enormous improvements in patients with low-frequency residual hearing...
March 16, 2017: HNO
https://www.readbyqxmd.com/read/28301392/combined-electric-and-acoustic-stimulation-with-hearing-preservation-effect-of-cochlear-implant-low-frequency-cutoff-on-speech-understanding-and-perceived-listening-difficulty
#15
René H Gifford, Timothy J Davis, Linsey W Sunderhaus, Christine Menapace, Barbara Buck, Jillian Crosson, Lori O'Neill, Anne Beiter, Phil Segel
OBJECTIVE: The primary objective of this study was to assess the effect of electric and acoustic overlap for speech understanding in typical listening conditions using semidiffuse noise. DESIGN: This study used a within-subjects, repeated measures design including 11 experienced adult implant recipients (13 ears) with functional residual hearing in the implanted and nonimplanted ear. The aided acoustic bandwidth was fixed and the low-frequency cutoff for the cochlear implant (CI) was varied systematically...
March 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28301391/comparison-of-multipole-stimulus-configurations-with-respect-to-loudness-and-spread-of-excitation
#16
Dirk Vellinga, Jeroen Johannes Briaire, David Michael Paul van Meenen, Johannes Hubertus Maria Frijns
OBJECTIVE: Current spread is a substantial limitation of speech coding strategies in cochlear implants. Multipoles have the potential to reduce current spread and thus generate more discriminable pitch percepts. The difficulty with multipoles is reaching sufficient loudness. The primary goal was to compare the loudness characteristics and spread of excitation (SOE) of three types of phased array stimulation, a novel multipole, with three more conventional configurations. DESIGN: Fifteen postlingually deafened cochlear implant users performed psychophysical experiments addressing SOE, loudness scaling, loudness threshold, loudness balancing, and loudness discrimination...
March 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28301390/pre-and-postoperative-binaural-unmasking-for-bimodal-cochlear-implant-listeners
#17
Benjamin M Sheffield, Gerald Schuchman, Joshua G W Bernstein
OBJECTIVES: Cochlear implants (CIs) are increasingly recommended to individuals with residual bilateral acoustic hearing. Although new hearing-preserving electrode designs and surgical approaches show great promise, CI recipients are still at risk to lose acoustic hearing in the implanted ear, which could prevent the ability to take advantage of binaural unmasking to aid speech recognition in noise. This study examined the tradeoff between the benefits of a CI for speech understanding in noise and the potential loss of binaural unmasking for CI recipients with some bilateral preoperative acoustic hearing...
March 15, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28301272/speech-recognition-in-bilaterally-cochlear-implanted-adults-in-tokyo-japan
#18
Yoko Ohta, Atsushi Kawano, Sachie Kawaguchi, Kyoko Shirai, Kiyoaki Tsukahara
INTRODUCTION: The clinical effects of bilateral cochlear implantation (BCI) include binaural summation and better hearing under noise conditions. This study retrospectively examined the utility of BCI compared to unilateral cochlear implantation (CI) in adults. PATIENTS AND METHODS: We investigated 34 adults who underwent BCI, comparing speech recognition between BCI and first CI under silent and noise conditions. We assessed correlations between speech recognition after first and second CIs, and between the interval from first to second CI surgery and speech recognition of second CI...
March 16, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28300958/use-of-fm-system-in-cochlear-implant
#19
Joice de Moura Silva, Luzia Maria Pozzobom Ventura Pizarro, Liège Franzini Tanamati
Purpose: To verify the use of the Frequency Modulation System (FM) and its benefit for cochlear implant users. Methods: Analysis of medical records of 113 users of Cochlear Implants (CI) adapted with FM System kits between September 2013 and September 2015 after publication of the Administrative Rule 1.274 of 6/25/2013, regarding the results of the speech perception tests (SPT) and the Listening Inventory For Education - Revised (LIFE-R) and Classroom Participation Questionnaire (CPQ)...
March 9, 2017: CoDAS
https://www.readbyqxmd.com/read/28298021/prophylactic-nimodipine-treatment-and-improvement-in-hearing-outcome-after-vestibular-schwannoma-surgery-a-combined-analysis-of-a-randomized-multicenter-phase-iii-trial-and-its-pilot-study
#20
Christian Scheller, Andreas Wienke, Marcos Tatagiba, Alireza Gharabaghi, Kristofer F Ramina, Oliver Ganslandt, Barbara Bischoff, Johannes Zenk, Tobias Engelhorn, Cordula Matthies, Thomas Westermaier, Gregor Antoniadis, Maria Teresa Pedro, Veit Rohde, Kajetan von Eckardstein, Thomas Kretschmer, Malte Kornhuber, Jörg Steighardt, Michael Richter, Fred G Barker, Christian Strauss
OBJECT In clinical routines, neuroprotective strategies in neurosurgical interventions are still missing. A pilot study (n = 30) and an analogously performed Phase III trial (n = 112) pointed to a beneficial effect of prophylactic nimodipine and hydroxyethyl starch (HES) in vestibular schwannoma (VS) surgery. Considering the small sample size, the data from both studies were pooled. METHODS The patients in both investigator-initiated studies were assigned to 2 groups. The treatment group (n = 70) received parenteral nimodipine (1-2 mg/hour) and HES (hematocrit 30%-35%) from the day before surgery until the 7th postoperative day...
February 24, 2017: Journal of Neurosurgery
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