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Hearing Preservation

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https://www.readbyqxmd.com/read/29148288/cochlear-volume-as-a-predictive-factor-for-residual-hearing-preservation-after-conventional-cochlear-implantation
#1
Masahiro Takahashi, Yasuhiro Arai, Naoko Sakuma, Kenichiro Yabuki, Daisuke Sano, Goshi Nishimura, Nobuhiko Oridate, Shin-Ichi Usami
OBJECTIVE: The preservation of residual hearing after conventional cochlear implantation (CI) is frequently observed when atraumatic soft surgery is adopted. The purpose of this study was to elucidate the predictive factors for residual hearing preservation after atraumatic CI. PATIENTS: This study included 46 patients who underwent CI based on an atraumatic technique using a standard-length flexible electrode implant through a round window approach. MAIN OUTCOME MEASURE: Cochlear volume was measured using magnetic resonance imaging (MRI)...
November 17, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29140965/long-term-hearing-preservation-after-resection-of-vestibular-schwannoma-a-systematic-review-and-meta-analysis
#2
Syed F Ahsan, Farhan Huq, Michael Seidman, Andrew Taylor
OBJECTIVE: The objective is to perform a systematic review and meta-analysis of the literature on the long-term results of hearing preservation after vestibular schwannoma resection. DATA SOURCES: Ovid/Medline, PubMed, Embase, and the Cochrane library from January 1980 to January 2015. STUDY SELECTION: Inclusion criteria: age ≥18 years, minimum 10 patients in the treatment group, hearing preserving microsurgery, no previous radiation treatment, serviceable hearing at immediate postop follow-up, hearing outcomes reported using Gardner Robinson or the American Academy of Otolaryngology-Head and Neck Surgeons hearing grading scales, and average follow-up of 5 years...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29138759/identification-of-persistent-and-resurgent-sodium-currents-in-spiral-ganglion-neurons-cultured-from-the-mouse-cochlea
#3
Lorcan Browne, Katie E Smith, Daniel J Jagger
In spiral ganglion neurons (SGNs), the afferent single units of the auditory nerve, high spontaneous and evoked firing rates ensure preservation of the temporal code describing the key features of incoming sound. During postnatal development, the spatiotemporal distribution of ion channel subtypes contributes to the maturation of action potential generation in SGNs, and to their ability to generate spike patterns that follow rapidly changing inputs. Here we describe tetrodotoxin (TTX)-sensitive Na(+) currents in SGNs cultured from mice, whose properties may support this fast spiking behavior...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29135865/electrode-impedance-fluctuations-as-a-biomarker-for-inner-ear-pathology-after-cochlear-implantation
#4
June Choi, Matthew R Payne, Luke J Campbell, Christo W Bester, Carrie Newbold, Hayden Eastwood, Stephen J O'Leary
OBJECTIVES/HYPOTHESIS: Cochlear implant surgery now aims to preserve residual low frequency hearing. The current research explores whether fluctuations in the electrical impedance of cochlear implant electrodes may act as a biomarker for pathological changes that lead to the delayed loss of residual hearing. STUDY DESIGN: Secondary analysis of a double-blinded randomized trial, where methylprednisolone was administered intravenously before cochlear implantation with a view to preserving residual hearing...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29135686/cortical-correlates-of-binaural-temporal-processing-deficits-in-older-adults
#5
Ann Clock Eddins, David A Eddins
OBJECTIVES: This study was designed to evaluate binaural temporal processing in young and older adults using a binaural masking level difference (BMLD) paradigm. Using behavioral and electrophysiological measures within the same listeners, a series of stimulus manipulations was used to evaluate the relative contribution of binaural temporal fine-structure and temporal envelope cues. We evaluated the hypotheses that age-related declines in the BMLD task would be more strongly associated with temporal fine-structure than envelope cues and that age-related declines in behavioral measures would be correlated with cortical auditory evoked potential (CAEP) measures...
November 9, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29130439/cochlear-implantation-in-children-with-postlingual-progressive-steeply-sloping-high-frequency-hearing-loss
#6
Margaret A Meredith, Jay T Rubinstein, Kathleen C Y Sie, Susan J Norton
BACKGROUND: Children with steeply sloping sensorineural hearing loss (SNHL) lack access to critical high-frequency cues despite the use of advanced hearing aid technology. In addition, their auditory-only aided speech perception abilities often meet Food and Drug Administration criteria for cochlear implantation. PURPOSE: The objective of this study was to describe hearing preservation and speech perception outcomes in a group of young children with steeply sloping SNHL who received a cochlear implant (CI)...
November 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/29111339/combined-vocal-exercises-for-rehabilitation-after-supracricoid-laryngectomy-evaluation-of-different-execution-times
#7
Hevely Saray Lima Silveira, Marcia Simões-Zenari, Marco Aurélio Kulcsar, Claudio Roberto Cernea, Kátia Nemr
INTRODUCTION: The supracricoid partial laryngectomy allows the preservation of laryngeal functions with good local cancer control. OBJECTIVE: To assess laryngeal configuration and voice analysis data following the performance of a combination of two vocal exercises: the prolonged /b/vocal exercise combined with the vowel /e/ using chest and arm pushing with different durations among individuals who have undergone supracricoid laryngectomy. METHODS: Eleven patients undergoing partial laryngectomy supracricoid with cricohyoidoepiglottopexy (CHEP) were evaluated using voice recording...
October 27, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29103379/electrode-design-and-insertional-depth-dependent-intra-cochlear-pressure-changes-a-model-experiment
#8
P Mittmann, A Ernst, I Todt
BACKGROUND: Preservation of residual hearing is one of the major goals in modern cochlear implant surgery. Intra-cochlear fluid pressure changes influence residual hearing, and should be kept low before, during and after cochlear implant insertion. METHODS: Experiments were performed in an artificial cochlear model. A pressure sensor was inserted in the apical part. Five insertions were performed on two electrode arrays. Each insertion was divided into three parts, and statistically evaluated in terms of pressure peak frequency and pressure peak amplitude...
November 6, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/29102129/an-overview-of-cochlear-implant-electrode-array-designs
#9
REVIEW
Anandhan Dhanasingh, Claude Jolly
Cochlear implant electrode arrays are designed with specific characteristics that allow for the preservation of intra-cochlear structures during the insertion process, as well as during explantation. Straight lateral wall (LW) electrode arrays and pre-curved modiolar hugging (MH) electrode arrays are the two types that are commercially available. Although there is a third type of electrode array called the mid-scala (MS), which is positioned in the middle of the scala tympani (ST), and is usually considered as an MH type of electrode...
October 18, 2017: Hearing Research
https://www.readbyqxmd.com/read/29099442/prospective-evaluation-of-patients-undergoing-translabyrinthine-excision-of-vestibular-schwannoma-with-concurrent-cochlear-implantation
#10
Meredith A Rooth, Margaret T Dillon, Kevin D Brown
OBJECTIVE: Translabyrinthine (TL) vestibular schwannoma (VS) resection may be accomplished with preservation of the cochlear nerve, permitting successful, concurrent cochlear implantation. In this single institution, Food and Drug Administration-approved feasibility study, we wished to determine the success and outcomes of concurrent cochlear implantation at the time of TL resection of VS. STUDY DESIGN: Prospective cohort. SETTING: Tertiary referral center...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29098313/-surgery-of-vestibular-schwannoma%C3%A2-more-clinical-diagnostics-of-vertigo-for-a-better-preservation-of-hearing
#11
REVIEW
A Blödow
No abstract text is available yet for this article.
November 2, 2017: HNO
https://www.readbyqxmd.com/read/29092806/an-effective-surgical-approach-for-the-management-of-recurrent-first-branchial-cleft-fistula-with-cysts-a-case-report
#12
Mi Jang, Chunfu Dai
The goal of this case report is to describe an unusual case of recurrent first branchial cleft fistula with cysts and the effective surgical approach of complete removal with preservation of the facial nerve. A 27-year-old woman presented to our clinic after unsuccessful removal twice during the last 20 years. We have achieved satisfactory outcomes by using an approach to identify the facial nerve at the stylomastoid foramen with canal wall up mastoidectomy under a microscope. No sign of facial palsy, hearing loss, or recurrence were noted in postoperative follow-up...
November 2, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/29092558/examination-of-a-hybrid-beamformer-that-preserves-auditory-spatial-cues
#13
Virginia Best, Elin Roverud, Christine R Mason, Gerald Kidd
A hearing-aid strategy that combines a beamforming microphone array in the high frequencies with natural binaural signals in the low frequencies was examined. This strategy attempts to balance the benefits of beamforming (improved signal-to-noise ratio) with the benefits of binaural listening (spatial awareness and location-based segregation). The crossover frequency was varied from 200 to 1200 Hz, and performance was compared to full-spectrum binaural and beamformer conditions. Speech intelligibility in the presence of noise or competing speech was measured in listeners with and without hearing loss...
October 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29080147/non-invasive-intraoperative-monitoring-of-cochlear-function-by-cochlear-microphonics-during-cerebellopontine-angle-surgery
#14
Blandine Lourenço, Béatriz Madero, Stéphane Tringali, Xavier Dubernard, Toufic Khalil, André Chays, Arnaud Bazin, Thierry Mom, Paul Avan
In vestibular-schwannoma (VS) surgery, hearing-preservation rate remains low. Besides damage to the cochlear nerve, intraoperative cochlear ischemia is a potential cause of hearing loss. Here, we used non-invasive cochlear microphonic (CM) recordings to detect the cochlear vascular events of VS surgery. Continuous intraoperative CM monitoring, in response to 80-95 dB SPL, 1-kHz tone-bursts, was performed in two samples of patients undergoing retrosigmoid cerebellopontine-angle surgery: one for VS (n = 31) and one for vestibular neurectomy or vasculo-neural conflict causing intractable trigeminal neuralgia, harmless to hearing (n = 19, control group)...
October 27, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29073844/hearing-preservation-cochlear-implantation-in-children-the-hearring-group-consensus-and-practice-guide
#15
Gunesh Rajan, Dayse Tavora-Vieira, Wolf-Dieter Baumgartner, Benoit Godey, Joachim Müller, Martin O'Driscoll, Henryk Skarzynski, Piotr Skarzynski, Shin-Ichi Usami, Oliver Adunka, Sumit Agrawal, Iain Bruce, Marc De Bodt, Marco Caversaccio, Harold Pilsbury, Javier Gavilán, Rudolf Hagen, Abdulrahman Hagr, Mohan Kameswaran, Eva Karltorp, Martin Kompis, Vlad Kuzovkov, Luis Lassaletta, Li Yongxin, Artu Lorensr, Manikoth Manoj, Jane Martin, Griet Mertens, Robert Mlynski, Lorn Parnese, Sasidharan Pulibalathingal, Andreas Radeloff, Christopher H Raine, Ranjith Rajeswaran, Joachim Schmutzhard, Georg Sprinzl, Hinrich Staecker, Kurt Stephan, Serafima Sugarova, Mario Zernotti, Patrick Zorowka, Paul Van de Heyning
OBJECTIVES: To provide multidisciplinary cochlear implant teams with a current consensus statement to support hearing preservation cochlear implantation (HPCI) in children, including those children with symptomatic partial deafness (PD) where the intention is to use electric-acoustic stimulation (EAS). The main objectives are to provide guidelines on who is a candidate, how to assess these children and when to implant if Med-El Flex electrode arrays are chosen for implantation. METHODS: The HEARRING group reviewed the current evidence and practice regarding the management of children to be considered for HPCI surgery emphasizing the assessment needed prior to implantation in order to demonstrate the benefits in these children over time...
October 26, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/29066124/population-based-study-of-stereotactic-radiosurgery-or-fractionated-stereotactic-radiation-therapy-for-vestibular-schwannoma-long-term-outcomes-and-toxicities
#16
Andrea Lo, Gareth Ayre, Roy Ma, Fred Hsu, Ryojo Akagami, Michael McKenzie, Boris Valev, Ermias Gete, Isabelle Vallieres, Alan Nichol
PURPOSE: To examine long-term local control of vestibular schwannoma and side effects in patients treated with stereotactic radiosurgery (SRS) and fractionated stereotactic radiation therapy (SRT) in British Columbia. METHODS AND MATERIALS: From August 1998 to May 2009, 207 patients were treated with radiation therapy (RT) at British Columbia Cancer Agency. 136 (66%) received SRS, and 71 (34%) received SRT. Dose prescriptions were 50 Gy/25 fractions for SRT and 12 Gy/1 fraction for SRS...
September 18, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29050101/-factors-of-hearing-preservation-in-acoustic-neuroma-surgery
#17
H Y Tan, Z Y Wang, H Wu
Over the past 50 years, the focus of acoustic neuroma surgery has shifted from low mortality and tumor resection to retention of neurological function. Hearing preservation is another point in addition to facial nerve function preservation. Hearing preservation rates overall ranged from 2% to 93% in recent studies. Characteristics such as approach, pre-operative neurological function, tumor size, nerve of origin and fundal fluid of the internal auditory canal have been reported as possible influencing factors...
October 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29049602/speech-understanding-in-complex-listening-environments-by-listeners-fit-with-cochlear-implants
#18
Michael F Dorman, Rene H Gifford
Purpose: The aim of this article is to summarize recent published and unpublished research from our 2 laboratories on improving speech understanding in complex listening environments by listeners fit with cochlear implants (CIs). Method: CI listeners were tested in 2 listening environments. One was a simulation of a restaurant with multiple, diffuse noise sources, and the other was a cocktail party with 2 spatially separated point sources of competing speech. At issue was the value of the following sources of information, or interventions, on speech understanding: (a) visual information, (b) adaptive beamformer microphones and remote microphones, (c) bimodal fittings, that is, a CI and contralateral low-frequency acoustic hearing, (d) hearing preservation fittings, that is, a CI with preserved low-frequency acoustic in the same ear plus low-frequency acoustic hearing in the contralateral ear, and (e) bilateral CIs...
October 17, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/29044151/modeling-and-preventing-progressive-hearing-loss-in-usher-syndrome-iii
#19
Ruishuang Geng, Akil Omar, Suhasini R Gopal, Daniel H-C Chen, Ruben Stepanyan, Martin L Basch, Astra Dinculescu, David N Furness, David Saperstein, William Hauswirth, Lawrence R Lustig, Kumar N Alagramam
Usher syndrome type III (USH3) characterized by progressive loss of vision and hearing is caused by mutations in the clarin-1 gene (CLRN1). Clrn1 knockout (KO) mice develop hair cell defects by postnatal day 2 (P2) and are deaf by P21-P25. Early onset profound hearing loss in KO mice and lack of information about the cochlear cell type that requires Clrn1 expression pose challenges to therapeutic investigation. We generated KO mice harboring a transgene, TgAC1, consisting of Clrn1-UTR (Clrn1 cDNA including its 5' and 3' UTR) under the control of regulatory elements (Atoh1 3' enhancer/β-globin basal promoter) to direct expression of Clrn1 in hair cells during development and down regulate it postnatally...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29038950/firing-a-loaded-gun-during-sleep-in-an-elderly-man-with-a-perfect-storm-of-risk-factors-including-severe-obstructive-sleep-apnea
#20
Francesca Ingravallo, Carlos H Schenck, Ernesto D'Aloja, Monica Puligheddu
PURPOSE: We report a case of firing a loaded gun during sleep in a geriatric patient with undiagnosed major sleep disorders and multiple risk factors for sleep violence. Polysomnographic findings, diagnostic challenges, and forensic implications in this unprecedented geriatric case are discussed. METHODS: A 75-year-old employed man, married for 32 years, presented to a sleep center reporting to having fired a shot in his bedroom during sleep while his wife was away, without memory of hearing the gunshot...
October 16, 2017: Sleep & Breathing, Schlaf & Atmung
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