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Middle ear implant

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https://www.readbyqxmd.com/read/28889786/implantable-microphones-as-an-alternative-to-external-microphones-for-cochlear-implants
#1
Alistair Mitchell-Innes, Robert Morse, Richard Irving, Philip Begg
Totally implantable cochlear implants may be able to address many of the problems cochlear implant users have around cosmetic appearances, discomfort, and restriction of activities. The major technological challenges that need to be solved to develop a totally implantable device relate to implanted microphone performance. Previous attempts at implanting microphones for cochlear implants have not performed as well as conventional cochlear implant microphones, and in addition have struggled with extraneous body or surface contact noise...
September 11, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28885481/comparison-of-an-electromagnetic-middle-ear-implant-and-hearing-aid-word-recognition-performance-to-word-recognition-performance-obtained-under-earphones
#2
C Y Joseph Chang, Michael Spearman, Brian Spearman, Anna McCraney, Michael E Glasscock
OBJECTIVE: To report the results of patients with the Maxum middle ear implant (MEI) and compare word recognition scores (WRS) and speech perception gap (SP Gap) of Maxum versus optimally fit hearing aids (HA). STUDY DESIGN: Case series with chart review. SETTING: Single, private otology clinic. PATIENTS: Eleven ears, in nine adult patients (two women; average age 62.7 yr). INTERVENTIONS: Twelve consecutive ears with moderate to severe sensorineural hearing loss (SNHL) underwent implantation of the Maxum system...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28869639/analysis-of-the-influence-of-the-transducer-and-its-coupling-layer-on-round-window-stimulation
#3
Houguang Liu, Dan Xu, Jianhua Yang, Shanguo Yang, Gang Cheng, Xinsheng Huang
PURPOSE: In this work, a finite element study is proposed to evaluate the effects of the transducer and its coupling layer on the performance of round window (RW) stimulation. METHODS: Based on a set of micro-computer tomography images of a healthy adult's right ear and reverse engineering technique, a coupled finite-element model of the human ear and the transducer was constructed and verified. Then, the effect of the cross-section of the transducer, the elastic modulus of the coupling layer, the mass of the transducer, and the preload of the transducer were studied...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28854835/a-new-semi-implantable-middle-ear-implant-for-sensorineural-hearing-loss-three-years-follow-up-in-a-pilot-patient-s-group
#4
Maurizio Barbara, Luigi Volpini, Chiara Filippi, Francesca Atturo, Simonetta Monini
OBJECTIVE: The aim of this article is to report on the long-term follow-up of a new semi-implantable middle ear device utilized for restoration of moderate-to-severe sensorineural hearing loss in a first series of subjects. METHODS: Three subjects, affected by sensorineural hearing loss, have undergone implantation of Maxum(®) middle ear implant, via a transcanal approach. They all underwent an auditory assessment, paying particular attention on the pre- versus post-operative hearing levels under the unaided, best-fitted hearing aided and implant-aided conditions...
August 30, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28834277/vibrant-soundbridge-can-improve-the-most-comfortable-listening-level-in-sensorineural-hearing-loss-our-experience-of-61-patients
#5
Jinsei Jung, Jin Won Kim, In Seok Moon, Sung Huhn Kim, Jae Young Choi
In auditory rehabilitation, the most comfortable listening level (MCL) is important because the conversation partners of patients with hearing impairment are often individuals with normal hearing. Thus, normalizing MCL can help patients with hearing loss to reduce the communication handicap with individuals with normal hearing. While active middle ear implants demonstrate comparable performance with conventional hearing aids (HA) with regard to functional hearing gain and speech intelligibility, little is known about the effect of middle ear implants on the MCL...
August 18, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28806311/evaluation-of-maximal-speech-intelligibility-with-vibrant-soundbridge-in-patients-with-sensorineural-hearing-loss
#6
Hyun-Jin Lee, Jeon Mi Lee, Jae Young Choi, Jinsei Jung
OBJECTIVE: The study investigated improvements in maximal speech intelligibility after Vibrant Soundbridge (VSB) implantation and analyzed the effect of the hearing loss pattern on maximal speech intelligibility represented by a phonetically balanced word score (PBmax). The effect of middle ear implants on PBmax has not been evaluated yet. STUDY DESIGN: Study. SETTING: Tertiary academic medical center. PATIENTS/INTERVENTIONS: Sixty patients who underwent VSB from December 2011 to January 2016 were retrospectively reviewed...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28777229/the-modified-rambo-transcanal-approach-for-cochlear-implantation-in-charge-syndrome
#7
Cameron C Wick, Amy M Moore, Daniel E Killeen, Brandon Isaacson
OBJECTIVE: CHARGE syndrome is associated with a variety of temporal bone anomalies and deafness. The lack of surgical landmarks and facial nerve irregularities make cochlear implantation in this population a challenging endeavor. This study aims to describe a safe and efficacious transcanal approach for cochlear implantation that obviates the need to perform a mastoidectomy and facial recess. PATIENTS: Three children with profound hearing loss secondary to CHARGE syndrome...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28756095/surgical-considerations-and-safety-of-cochlear-implantation-in-otitis-media-with-effusion
#8
Rasit Cevizci, Alper Dilci, Fatih Celenk, Recep Karamert, Yildirim Bayazit
OBJECTIVE: To evaluate the effects of otitis media with effusion on surgical parameters, patient safety, perioperative and postoperative complications. METHODS: Total 890 children who underwent cochlear implantation between 2006 and 2015 were included. The ages ranged from 12 months to 63 months (mean: 32 months). The patients were divided into two groups according to the presence or absence of otitis media with effusion; otitis media with effusion group and non-otitis media group...
July 26, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28731963/audiologic-gain-of-incus-short-process-vibroplasty-with-conventional-incus-long-process-vibroplasty-a-retrospective-analysis-of-36-patients
#9
Jeon Mi Lee, Young Ho Lee, Jinsei Jung, Sung Huhn Kim, In Seok Moon, Jae Young Choi
OBJECTIVE: To compare the audiological and non-audiological benefits of incus short process (SP) vibroplasty with those of conventional incus long process (LP) vibroplasty. STUDY DESIGN: Retrospective analysis. SETTING: Tertiary referral center. PATIENTS: Thirty-six patients with sensorineural hearing loss were treated with the semi-implantable middle ear hearing device. Of these, 22 were treated with conventional LP vibroplasty, and 14 were treated with SP vibroplasty using SP couplers...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28728240/-the-implantation-of-bonebridge-in-bilateral-congenital-malformation-of-external-and-middle-ear
#10
S Q Zhao, R Ren, D M Han, Y Li, X B Ma, D N Wang, Y L Li
Objective: To evaluate the auditory efficacy of Bonebridge implantation in patients with bilateral congenital malformation of external and middle ear. Methods: Eleven cases (6 males and 5 females) had unilateral Bonebridge implantation. The age ranged from 8 to 26 and the average age was 16.9. Seven to ten days after operation, the first fitting was undergone. In acoustic sound field, the average auditory thresholds were respectively measured for unaided ears and Bonebridge implanted ears by pure tone auditory (PTA, 0...
July 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/28717576/demodulation-of-quasi-quadrature-interferometric-signals-for-use-in-the-totally-implantable-hearing-aids
#11
Milos C Tomic, Zoran V Djinovic, Slobodan J Petricevic
We propose and experimentally prove an algorithm for demodulation of interferometric signals, modified for use in a totally implantable hearing aid device. A fiber optic configuration, which generates two quasi-quadrature signals by a passive 3x3 coupler, for a non-contact detection of the middle ear ossicle vibration is employed. We simulated the ossicle vibration and large movements and demonstrated the effectiveness of the algorithm to compensate changes of the signal DC values and the phase shift introduced by the coupler...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28708797/role-of-multislice-ct-imaging-in-predicting-the-visibility-of-the-round-window-in-pediatric-cochlear-implantation
#12
Yasser A Fouad, Ahmad Shaker Elaassar, Mohammad Waheed El-Anwar, Ebrahim Sabir, Ahmad Abdelhamid, Mai Ghonimy
BACKGROUND: High-resolution computed tomography (HRCT) magnifies the role of preoperative imaging for detailed inner and middle ear anatomical information and enhances more efforts for better dependent correlation and measurements of round window (RW). OBJECTIVE: To find an applicable way by HRCT imaging for the prediction of the visibility of the RW during cochlear implantation (CI) surgery. METHODS: Five radiologic measurements were performed on the axial HRCT and these measurements were correlated with the degree of RW visibility after performing posterior tympanotomy during CI surgery...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28671917/experimental-simulation-of-clinical-borderline-situations-in-temporal-bone-specimens-after-ossiculoplasty
#13
Till F Jakob, Jan Kromeier, Tobias Baumann, Jens Pfeiffer, Marcus Neudert, Roland Laszig, Thomas Zahnert, Christian Offergeld
OBJECTIVES: One reason for insufficient hearing improvement with a distinct air-bone gap after ossiculoplasty with implantation of partial or total ossicular replacement prostheses can be the dislocation or minimal shifting of the prosthesis. The aim of this study was the simulation of common clinical borderline situations with minimal shifting of the prosthesis in temporal bone specimens after ossiculoplasty. It was furthermore the goal to identify these specific situations through imaging by cone beam computed tomography (cbCT) and direct visual inspection using the operation microscope...
June 30, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28666703/a-comparative-study-of-med-el-fmt-attachment-to-the-long-process-of-the-incus-in-intact-middle-ears-and-its-attachment-to-disarticulated-stapes-head
#14
Tao Chen, Liu-Jie Ren, Dong-Ming Yin, Jia Li, Lin Yang, Pei-Dong Dai, Tian-Yu Zhang
The Vibrant Soundbridge(©) (VSB) active middle-ear implant provides an effective treatment for mild-to-severe sensorineural hearing loss in the case of normal middle ear anatomy and mixed hearing loss in middle ear malformation. The VSB floating mass transducer (FMT), with proper couplers, can be installed on various structures of the ossicular chain, e.g., the short and long process of the incus, the stapes head, and the stapes footplate. A long process (LP) coupler is most commonly used for FMT attachment to the long process of the incus with intact ossicular chain, while CliP and Bell couplers are two standardized and reliable methods for FMT attachment to the stapes head with missing incus and malleus...
June 23, 2017: Hearing Research
https://www.readbyqxmd.com/read/28601531/sheep-as-a-large-animal-ear-model-middle-ear-ossicular-velocities-and-intracochlear-sound-pressure
#15
Dominik Péus, Ivo Dobrev, Lukas Prochazka, Konrad Thoele, Adrian Dalbert, Andreas Boss, Nicolas Newcomb, Rudolf Probst, Christof Röösli, Jae Hoon Sim, Alexander Huber, Flurin Pfiffner
Animals are frequently used for the development and testing of new hearing devices. Dimensions of the middle ear and cochlea differ significantly between humans and commonly used animals, such as rodents or cats. The sheep cochlea is anatomically more like the human cochlea in size and number of turns. This study investigated the middle-ear ossicular velocities and intracochlear sound pressure (ICSP) in sheep temporal bones, with the aim of characterizing the sheep as an experimental model for implantable hearing devices...
August 2017: Hearing Research
https://www.readbyqxmd.com/read/28594978/association-of-gel-forming-mucins-and-aquaporin-gene-expression-with-hearing-loss-effusion-viscosity-and-inflammation-in-otitis-media-with-effusion
#16
Tina L Samuels, Justin C Yan, Pawjai Khampang, Peter W Dettmar, Alexander MacKinnon, Wenzhou Hong, Nikki Johnston, Blake C Papsin, Robert H Chun, Michael E McCormick, Joseph E Kerschner
Importance: Persistent, viscous middle ear effusion in pediatric otitis media (OM) contributes to increased likelihood of anesthesia and surgery, conductive hearing loss, and subsequent developmental delays. Biomarkers of effusion viscosity and hearing loss have not yet been identified despite the potential that such markers hold for targeted therapy and screening. Objective: To investigate the association of gel-forming mucins and aquaporin 5 (AQP5) gene expression with inflammation, effusion viscosity, and hearing loss in pediatric OM with effusion (OME)...
August 1, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28581120/evaluating-speech-perception-of-the-maxum-middle-ear-implant-versus-speech-perception-under-inserts
#17
R Kent Dyer, Michael Spearman, Brian Spearman, Anna McCraney
OBJECTIVES/HYPOTHESIS: To evaluate the speech perception of the Ototronix MAXUM middle ear implant relative to the cochlear potential for speech perception of patients. STUDY DESIGN: Clinical study chart review. METHODS: We performed an evaluation of data from a prospective clinical study of 10 MAXUM patients. Primary outcome measures included comparison of word recognition (WR) scores with MAXUM (WRMAXUM ) versus word recognition under inserts (WRinserts ), and the functional gain improvement for pure-tone average (PTA) (0...
June 5, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28538078/vibroplasty-in-severe-congenital-or-acquired-meatal-stenosis-by-coupling-an-active-middle-ear-implant-to-the-short-process-of-the-incus
#18
Jan Peter Thomas, Christiane Voelter, Katrin Neumann, Stefan Dazert
OBJECTIVE: To evaluate the safety and effectiveness of coupling an active middle ear implant to the short process of the incus in subjects with meatal pathologies. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. PATIENTS: Twelve patients suffering from either congenital aural atresia or acquired meatal fibrosis. INTERVENTION: Implantation of an active middle ear implant with coupling of the actuator to the short process of the incus...
August 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28516965/benefits-of-active-middle-ear-implants-over-hearing-aids-in-patients-with-sloping-high-tone-hearing-loss-comparison-with-hearing-aids
#19
J M Lee, J H Jeon, I S Moon, J Y Choi
In this retrospective chart review we compared the subjective and objective benefits of active middle ear implants (AMEIs) with conventional hearing aids (HAs) in patients with sloping high tone hearing loss. Thirty-four patients with sensorineural hearing loss were treated with AMEIs. Of these, six had sloping high tone hearing loss and had worn an HA for more than 6 months. Objective assessments, a pure-tone audiogram, as well as a word recognition test, and the Korean version of the Hearing in Noise Test (K-HINT), and a subjective assessment, the Abbreviated Profile of Hearing Aid Benefit (APHAB) questionnaire, were performed...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28499303/-long-term-follow-up-and-patient-satisfaction-after-tympanoplasty-with-titanium-clip-prothesis
#20
Guido Wolferts, Daniel Schicke, K-Wolfgang Delank
Aim of the present study is to evaluate the long term results of ossiculoplasty using titanium clip prosthesis. A retrospective analysis with prospective follow-up has been done including for all patients who had a Clip-PORP implanted between the years 2002-2013. Following this, audiometric hearing results were measured with clinical examination including otoscopy and quality of life evaluation using Glasgow benefit inventory. 48 patients (51 ears, 29 men, 19 women, average age 44.1 years) received followed up after an average duration of 6...
May 12, 2017: Laryngo- Rhino- Otologie
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