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https://www.readbyqxmd.com/read/29210944/stapes-release-in-tympanosclerosis
#1
Es-Hak Bedri, Nebiat Teferi, Miriam Redleaf
: Tympanosclerosis in the middle ear space is common in Ethiopia and often involves the ossicles and particularly the stapes. Ear operations in Ethiopia are relatively expensive in this country of limited medical resources and a low average living wage. In this setting, 2-stage operations using prostheses become prohibitively expensive. Therefore, the recommended 2-stage approach for tympanic membrane perforation with tympanosclerosis and stapes fixation is impractical for Ethiopia.We present a series of 67 patients who had a single stage tympanoplasty, removal of tympanosclerosis from the stapes suprastructure, and ossicular chain reconstruction using ossicular interposition...
November 28, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29209853/3d-endoscopic-ear-surgery-a-clinical-pilot-study
#2
Daniele Bernardeschi, Ghizlene Lahlou, Daniele De Seta, Francesca Yoshie Russo, Isabelle Mosnier, Olivier Sterkers
OBJECTIVE: To evaluate the feasibility and efficacy of a new high-resolution 3D endoscope in endoscopic ear and lateral skull base surgery. METHODS: Eight patients, five women and three men, were included in this clinical pilot prospective study. Their age was 38 ± 17.3 years (mean ± SD, range 17-54 years). The right side was involved in five cases, and the left side in three cases. There were three cases of chronic otitis, one case of cholesteatoma of the external auditory canal, one case of otosclerosis, one case of cochlear implant surgery, and two cases of stage 2 vestibular schwannoma operated on with a retrosigmoid approach to preserve hearing...
December 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29205455/the-middle-and-inner-ears-of-the-palaeogene-golden-mole-namachloris-a-comparison-with-extant-species
#3
Matthew J Mason, Nigel C Bennett, Martin Pickford
Many living species of golden moles (Chrysochloridae) have greatly enlarged middle ear ossicles, believed to be used in the detection of ground vibrations through inertial bone conduction. Other unusual features of chrysochlorids include internally coupled middle ear cavities and the loss of the tensor tympani muscle. Our understanding of the evolutionary history of these characteristics has been limited by the paucity of fossil evidence. In this article, we describe for the first time the exquisitely preserved middle and inner ears of Namachloris arenatans from the Palaeogene of Namibia, visualised using computed tomography, as well as ossicles attributed to this species...
December 4, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/29192304/association-of-hearing-loss-and-otologic-outcomes-with-fibrous-dysplasia
#4
Alison M Boyce, Carmen Brewer, Timothy R DeKlotz, Christopher K Zalewski, Kelly A King, Michael T Collins, H Jeffrey Kim
Importance: Fibrous dysplasia (FD) and McCune-Albright syndrome (MAS) are rare bone and endocrine disorders in which expansile fibro-osseous lesions result in deformity, pain, and functional impairment. The effect of FD on hearing and otologic function has not been established. Objectives: To characterize audiologic and otologic manifestations in a large cohort of individuals with FD/MAS and to investigate potential mechanisms of hearing loss. Design, Setting, and Participants: In this natural history study, individuals with craniofacial FD seen at a clinical research center underwent clinical, biochemical, computed tomographic, audiologic, and otolaryngologic evaluations...
November 30, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/29190487/minimally-invasive-laser-vibrometry-mivib-with-a-floating-mass-transducer-a-new-method-for-objective-evaluation-of-the-middle-ear-demonstrated-on-stapes-fixation
#5
Jeremy Wales, Kilian Gladiné, Paul Van de Heyning, Vedat Topsakal, Magnus von Unge, Joris Dirckx
Ossicular fixation through otosclerosis, chronic otitis media and other pathologies, especially tympanosclerosis, are treated by surgery if hearing aids fail as an alternative. However, the best hearing outcome is often based on knowledge of the degree and location of the fixation. Objective methods to quantify the degree and position of the fixation are largely lacking. Laser vibrometry is a known method to detect ossicular fixation but clinical applicability remains limited. A new method, minimally invasive laser vibrometry (MIVIB), is presented to quantify ossicle mobility using laser vibrometry measurement through the ear canal after elevating the tympanic membrane, thus making the method feasible in minimally invasive explorative surgery...
November 20, 2017: Hearing Research
https://www.readbyqxmd.com/read/29169906/limits-on-normal-cochlear-third-windows-provided-by-previous-investigations-of-additional-sound-paths-into-and-out-of-the-cat-inner-ear
#6
John J Rosowski, Peter Bowers, Hideko H Nakajima
While most models of cochlear function assume the presence of only two windows into the mammalian cochlea (the oval and round windows), a position that is generally supported by several lines of data, there is evidence for additional sound paths into and out of the inner ear in normal mammals. In this report we review the existing evidence for and against the 'two-window' hypothesis. We then determine how existing data and inner-ear anatomy restrict transmission of sound through these additional sound pathways in cat by utilizing a well-tested model of the cat inner ear, together with anatomical descriptions of the cat cochlear and vestibular aqueducts (potential additional windows to the cochlea)...
November 10, 2017: Hearing Research
https://www.readbyqxmd.com/read/29158536/validation-of-methods-for-prediction-of-clinical-output-levels-of-active-middle-ear-implants-from-measurements-in-human-cadaveric-ears
#7
Martin Grossöhmichen, Bernd Waldmann, Rolf Salcher, Nils Prenzler, Thomas Lenarz, Hannes Maier
Today, the standard method to predict output levels of active middle ear implants (AMEIs) before clinical data are available is stapes vibration measurement in human cadaveric ears, according to ASTM standard F2504-05. Although this procedure is well established, the validity of the predicted output levels has never been demonstrated clinically. Furthermore, this procedure requires a mobile and visually accessible stapes and an AMEI stimulating the ossicular chain. Thus, an alternative method is needed to quantify the output level of AMEIs in all other stimulation modes, e...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29149722/effects-of-middle-ear-quasi-static-stiffness-on-sound-transmission-quantified-by-a-novel-3-axis-optical-force-sensor
#8
Ivo Dobrev, Jae Hoon Sim, Baktash Aqtashi, Alexander M Huber, Thomas Linder, Christof Röösli
BACKGROUND: Intra-operative quantification of the ossicle mobility could provide valuable feedback for the current status of the patient's conductive hearing. However, current methods for evaluation of middle ear mobility are mostly limited to the surgeon's subjective impression through manual palpation of the ossicles. This study investigates how middle ear transfer function is affected by stapes quasi-static stiffness of the ossicular chain. The stiffness of the middle ear is induced by a) using a novel fiber-optic 3-axis force sensor to quantify the quasi-static stiffness of the middle ear, and b) by artificial reduction of stapes mobility due to drying of the middle ear...
November 10, 2017: Hearing Research
https://www.readbyqxmd.com/read/29121375/management-of-benign-middle-ear-tumors-a-series-of-7-cases
#9
Z Jason Qian, Amy M Coffey, Kathleen M O'Toole, Anil K Lalwani
Benign middle ear tumors represent a rare group of neoplasms that vary widely in their pathology, anatomy, and clinical findings. These factors have made it difficult to establish guidelines for the resection of such tumors. Here we present 7 unique cases of these rare and diverse tumors and draw from our experience to recommend optimal surgical management. Based on our experience, a postauricular incision is necessary in nearly all cases. Mastoidectomy is required for tumors that extend into the mastoid cavity...
October 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/29116047/factors-that-have-an-influence-on-bone-conduction-thresholds-changes-after-otosurgery-in-the-patients-operated-on-due-to-the-perforation-of-the-tympanic-membrane-with-the-preserved-ossicular-chain
#10
Maciej Wiatr, Agnieszka Wiatr, Sebastian Kocoń, Jacek Składzień
INTRODUCTION: The aim of the middle ear surgery is to eliminate abnormalities from the mucous, ensure the due airing of the postoperative cavity and reconstruct the sound-conducting system in the middle ear. Numerous reports can be found in literature on the changes to bone conduction as a consequence of middle ear surgery. STUDY OBJECTIVE: The aim of the work is to define the factors that affect bone conduction in the patients operated on due to the perforation of the tympanic membrane with the preserved and normal mobile ossicular chain...
August 31, 2017: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29109839/hearing-and-mortality-outcomes-following-temporal-bone-fractures
#11
Adam Honeybrook, Aniruddha Patki, Nikita Chapurin, Charles Woodard
The aim of this article is to determine hearing and mortality outcomes following temporal bone fractures. Retrospective chart review was performed of 152 patients diagnosed with a temporal bone fracture presenting to the emergency room at a tertiary care referral center over a 10-year period. Utilizing Patients' previously obtained temporal bone computed tomographic scans and audiograms, fractures were classified based on several classification schemes. Correlations between fracture patterns, mortality, and hearing outcomes were analyzed using χ(2) tests...
December 2017: Craniomaxillofacial Trauma & Reconstruction
https://www.readbyqxmd.com/read/29106870/pediatric-tympanic-membrane-cholesteatoma-systematic-review-and-meta-analysis
#12
REVIEW
Harry H Ching, Alycia G Spinner, Matthew Ng
INTRODUCTION: Tympanic membrane cholesteatoma (TMC) is a rare anomaly found in pediatric patients with no significant otologic history. Its pathogenesis appears distinct from congenital mesotympanic cholesteatoma. This systematic review and meta-analysis evaluates the management of TMC. METHODS: Two authors independently conducted a systematic review using the PubMed-NCBI, Cochrane Library, and Web of Science databases. Studies describing cases of pediatric TMC were included...
November 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29099047/concept-and-evaluation-of-a-new-piezoelectric-transducer-for-an-implantable-middle-ear-hearing-device
#13
Houguang Liu, Jinlei Cheng, Jianhua Yang, Zhushi Rao, Gang Cheng, Shanguo Yang, Xinsheng Huang, Mengli Wang
Implantable middle ear hearing devices (IMEHDs) have been developed as a new technology to overcome the limitations of conventional hearing aids. The piezoelectric cantilever transducers currently used in the IMEHDs have the advantages of low power consumption and ease of fabrication, but generate less high-frequency output. To address this problem, we proposed and designed a new piezoelectric transducer based on a piezoelectric stack for the IMEHD. This new transducer, attached to the incus body with a coupling rod, stimulates the ossicular chain in response to the expansion-and-contraction of its piezoelectric stack...
November 2, 2017: Sensors
https://www.readbyqxmd.com/read/29096926/using-temporal-bone-computed-tomography-to-predict-sensorineural-hearing-loss-in-otic-capsule-sparing-temporal-bone-fracture
#14
Seog Kyun Mun, Kyung Hyun Oh, Young Ho Hong, Hyun Jin Min, Kyung Soo Kim, Sei Young Lee, Hoon Shik Yang, Mun Young Chang
OBJECTIVES: The purpose of this study was to investigate the efficacy of otic capsule-sparing (OCS) length for the prediction of sensorineural hearing loss (SNHL) in patients with OCS temporal bone fracture. METHODS: Thirty-four patients with OCS temporal bone fracture were enrolled, and their temporal bone computed tomography (TBCT), audiogram, and medical records were reviewed. The TBCT measured the shortest length between the otic capsule and fracture line. This length was referred to as the OCS length and was used to predict SNHL...
October 31, 2017: Injury
https://www.readbyqxmd.com/read/29073815/effect-of-esterified-hyaluronic-acid-as-middle-ear-packing-in-tympanoplasty-for-adhesive-otitis-media
#15
Rui Deng, Yanqing Fang, Jun Shen, Xiong Ou, Wenyi Liuyan, Bin Wan, Yasheng Yuan, Xiaoting Cheng, Yilai Shu, Bing Chen
OBJECTIVES: The goal of this study was to evaluate the effects of middle ear packing agents (MEPA) on post-operative hearing improvement and complications after tympanoplasty in patients with adhesive otitis media (OM). MATERIALS AND METHODS: Patients with adhesive OM who underwent tympanoplasty surgery were enrolled in the study between January 2012 and January 2015. A total of 205 patients who received canal wall-down tympanoplasty with ossicular chain reconstruction were randomized into one of the three groups with different MEPA...
October 26, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29017231/-long-term-follow-up-and-patient-satisfaction-after-tympanoplasty-with-titanium-clip-prothesis
#16
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...
October 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28994723/middle-ear-prosthesis-with-bactericidal-efficacy-in-vitro-investigation
#17
Magdalena Ziąbka, Michał Dziadek, Elżbieta Menaszek, Rafał Banasiuk, Aleksandra Królicka
Materials used in ossicular replacement prostheses must possess appropriate biological properties, such as biocompatibility, stability, no cytotoxicity. Due to the risk of infection (otitis media and chronic otitis media), it is desirable to use an antibacterial agent for illness prevention during the ossicular reconstruction. The goal of this work was to observe biological properties of a new composite prosthesis made of ABS containing silver nanoparticles (AgNPs 45T). Samples for biological tests and then a prototype of middle ear prosthesis were prepared using injection moulding and extrusion techniques...
October 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28964300/anatomical-measurement-of-the-ossicles-in-patients-with-congenital-aural-atresia-and-stenosis
#18
Jieying Li, Keguang Chen, Chenlong Li, Dongming Yin, Tianyu Zhang, Peidong Dai
OBJECTIVES: Our aims were to measure and compare anatomical parameters of the ossicles in normal, congenital aural stenosis (CAS), and congenital aural atresia (CAA) ears. METHODS: This retrospective study was performed using three-dimensional reconstructed images derived from computed tomography scans of 20 normal subjects, 20 CAS patients, and 20 CAA patients. RESULTS: The lengths of the malleus handle and long process of the incus were greater in normal ears than in CAS and CAA ears (all P < 0...
October 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28964299/otologic-manifestations-of-larsen-syndrome
#19
REVIEW
Letícia Helena de Sousa Marques, Daniela Vieira Martins, Gabriel Liria Juares, Fábio Tadeu Moura Lorenzetti, Rafael da Costa Monsanto
OBJECTIVE: To describe and discuss otologic manifestations of Larsen syndrome, based on a case report and a systematic review of the literature. MATERIALS AND METHODS: We performed a PubMED database search, and we selected studies reporting otolaryngologic manifestations secondary to Larsen syndrome. The selected articles were read in full, and three researchers independently extracted data from the studies. In parallel, we report the case of a 14-year-old patient who had hearing loss secondary to Larsen syndrome...
October 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28944619/comparative-study-of-new-autologous-material-bone-cartilage-composite-graft-for-ossiculoplasty-with-polycel-%C3%A2-and-titanium
#20
J S Kong, C Y Jeong, M J Shim, W J Kim, S W Yeo, S N Park
OBJECTIVE: Ossiculoplasty is a surgical procedure that recreates sound transmission of the middle ear in conductive hearing loss. Various materials have been used for ossicular reconstruction, but the most ideal material for ossiculoplasty remains controversial. The purpose of this study was to introduce a novel method of autologous ossiculoplasty, bone-cartilage composite graft (BCCG) and to compare its surgical results with different types of ossiculoplastic prostheses. STUDY DESIGN: A retrospective study was performed in a tertiary referral centre...
September 25, 2017: Clinical Otolaryngology
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