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https://www.readbyqxmd.com/read/28719718/cochlear-implant-electrode-array-exposure-a-delayed-complication
#1
Christina Mishu, David A Klodd, Miriam Redleaf
Exposure of the cochlear implant electrode array as a late complication has been reported rarely in the literature. A retrospective analysis revealed 4 patients presenting with exposure of their cochlear implant electrode arrays from 2 to 17 years after implantation. Data collected from these 4 patients were surgical implantation approach, type of implant, age at implant, interval between implant and complication, surgical correction of the problem, pathology at the time of correction, and length of follow-up after intervention...
July 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28718243/type-i-tympanoplasty-by-underlay-technique-factors-affecting-outcome
#2
Tahira Sajid, Mohammad Imran Shah, Rehman Ghani, Mohammad Asif
BACKGROUND: Type-I Tympanoplasty is an operation which is widely done to close a persistent tympanic membrane perforation after clearing the disease from the middle ear. It is very safe and effective procedure. The success rate varies in different setups and there are some confounding factors which affect the result of Type-I tympanoplasty like the size, type and location of perforation. By conducting this study, we aimed to calculate the success rate of Type-I Tympanoplasty in Ayub Teaching Hospital and assess which confounding factors affect the success rate...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28715600/ultrastructural-study-of-the-neural-microcircuits-in-the-sensory-epithelium-of-the-paratympanic-organ-of-the-chicken
#3
F Giannessi, L Ryskalin, R Ruffoli
The paratympanic organ (PTO) is a sensory organ located in the medial wall of the tympanic cavity of birds. The organ looks like a small tapering vesicle, and is equipped with a sensory epithelium formed by supporting cells (SCs) and Type II hair cells (Type II-HCs). The function of the PTO has not yet been precisely defined. The prevailing current hypothesis is that the PTO assesses the air pressure exerted on the external surface of the tympanic membrane. The PTO could may thus function as a barometer and, in flying birds, also as an altimeter...
July 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28708445/evaluation-of-yap-signaling-in-a-rat-tympanic-membrane-under-a-continuous-negative-pressure-load-and-in-human-middle-ear-cholesteatoma
#4
Naotaro Akiyama, Tomomi Yamamoto-Fukuda, Mamoru Yoshikawa, Hiromi Kojima
OBJECTIVES: Mechanotransduction plays an important role in cell-proliferative activities. Negative pressure in the middle ear is thought to be an important factor related to the etiology of acquired middle ear cholesteatoma. However, the correlation between negative pressure in the middle ear and the mechanism of middle ear cholesteatoma formation remains unclear. In this study, we investigated the expression of key molecules for mechanotransduction immunohistochemically. METHODS: An immunohistochemical analysis was performed using anti-Wnt5a (a marker of alternative Wnt signaling), -Yes-associated protein (YAP) (a marker of mechanosensing) and -pYAP (phosphorylated YAP at Ser 127: inactivated YAP) antibody in the tympanic membrane (TM) under a negative pressure load and in human middle ear cholesteatoma tissues...
July 14, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28707578/acute-otitis-media-in-children
#5
Alexander Kc Leung, Alex H C Wong
BACKGROUND: Acute otitis media is a common childhood infection. Prompt diagnosis and appropriate treatment are very important. OBJECTIVE: To review in depth the epidemiology, pathophysiology, clinical manifestations, diagnosis, complications and particularly treatment of acute otitis media in children. METHODS: A PubMed search was completed in Clinical Queries using the key term "acute otitis media". Patents were searched using the key term "acute otitis media" from www...
July 12, 2017: Recent Patents on Inflammation & Allergy Drug Discovery
https://www.readbyqxmd.com/read/28695815/effectiveness-of-underbody-forced-air-warming-system-in-preventing-hypothermia-in-patients-undergoing-major-surgeries
#6
Hao Liang, Jie Yi
Objective To compare the effectiveness of the forced-air warming system and the conventional warming care practice in preventing hypothermia in patients undergoing major surgeries.Methods A total of 62 patients were enrolled in this study. Patients of both sexes,aged≥18 years,and with an ASA physical status Ⅰ-Ⅲ were included and allocated randomly into intervention group(n=30)or control group(n=32). Patients in the intervention group were provided forced-air warming,either prior to induction or during the surgery procedure depending on core temperature monitoring results...
June 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28692592/reduction-in-temporary-and-permanent-audiological-injury-through-internal-jugular-vein-compression-in-a-rodent-blast-injury-model
#7
Brian Sindelar, Michael Shinners, Sydney Sherman, Kristine Erickson, Vimal Patel, Paul Kubilis, John D Finan, Julian E Bailes
HYPOTHESIS: Internal jugular vein (IJV) compression influences not only intracranial but also intracochlear physiology and has demonstrated preclinical effectiveness in reducing acute audiological injury in a rodent blast model. However, the long-term effects in this model are unknown. BACKGROUND: Blast wave-induced audiological injury from an improvised explosive device is a leading cause of morbidity among service members in theater but there are limitations to the current protective measures...
July 7, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28688565/diagnostic-accuracy-of-a-general-practitioner-with-video-otoscopy-collected-by-a-health-care-facilitator-compared-to-traditional-otoscopy
#8
Thorbjörn Lundberg, Leigh Biagio de Jager, De Wet Swanepoel, Claude Laurent
OBJECTIVE: Video-otoscopy is rapidly developing as a new method to diagnose common ear disease and can be performed by trained health care facilitators as well as by clinicians. This study aimed to compare remote asynchronous assessments of video-otoscopy with otoscopy performed by a general practitioner. METHOD: Children, aged 2-16 years, attending a health center in Johannesburg, South Africa, were examined. An otologist performed otomicroscopy and a general practitioner performed otoscopy...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28680629/an-isolated-traumatic-fracture-of-the-malleus-handle
#9
Sertac Yetiser
Traumatic fracture of the malleus handle without tympanic membrane perforation is a rare incidence. Diagnosis of conductive hearing loss can only be confirmed with manipulation of the ossicles under sedation as computerized tomography is not informative. We present a 39-year-old lady with Q-tip injury when she get sudden phone call.
July 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28675101/tympanoplasty-following-blast-injury
#10
Matthew Keller, Ryan Sload, Justin Wilson, Howard Greene, Peggy Han, Sean Wise
Objectives To assess outcomes following tympanoplasty for blast-induced tympanic membrane perforations in a military population. Study Design Case series with chart review. Setting Tertiary care medical centers. Subjects and Methods Military personnel (N = 254) undergoing tympanoplasty for blast-related tympanic membrane perforations sustained between April 2005 and July 2014 were identified from the Expeditionary Medical Encounter Database. Descriptive statistics were obtained regarding demographics, primary and revision surgery success rates, hearing status pre- and postsurgery, and frequency of ossicular reconstruction...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28658990/optimization-of-peptides-that-actively-cross-the-tympanic-membrane-by-random-amino-acid-extension-a-phage-display-study
#11
Arwa Kurabi, Daniel Schaerer, Lisa Chang, Kwang Pak, Allen F Ryan
Local treatment of middle ear (ME) disease currently requires surgical penetration of the tympanic membrane (TM). We previously discovered 12-mer peptides that are actively transported across the intact TM, a process that could be used for noninvasive drug delivery into the ME. To optimize transport and provide further understanding of the peptides transport mechanism, we extended two of the candidate peptides by six additional amino acids at random, and screened the resulting 18-mers libraries on TMs of rats with active bacterial otitis media (OM) for transport efficiency using phage display...
June 29, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28657955/the-hannover-coupler-controlled-static-prestress-in-round-window-stimulation-with-the-floating-mass-transducer
#12
Mathias Müller, Rolf Salcher, Thomas Lenarz, Hannes Maier
INTRODUCTION: Stimulation of the cochlear round window (RW) with the floating mass transducer (FMT) still suffers from large variation in clinical outcomes. Beside the geometric mismatch between RW and FMT diameter that is a known limiting factor in achieving optimal coupling between actuator and RW membrane, the applied static force between FMT and RW is usually undefined. In this study, the feasibility and efficacy of a specially designed FMT coupler permitting application of static preloads to the RW membrane to optimize FMT-RW coupling was investigated...
June 27, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28657952/diagnosis-of-superior-semicircular-canal-dehiscence-in-the-presence-of-concomitant-otosclerosis
#13
Michael Yong, Erica Zaia, Brian Westerberg, Jane Lea
OBJECTIVE: To review three patients with concurrent otosclerosis and superior canal dehiscence identified before operative intervention and provide a practical diagnostic approach to this clinical scenario. STUDY DESIGN: Retrospective patient series. SETTING: Tertiary/quaternary referral center. PATIENTS: Individuals with confirmed diagnoses of concurrent otosclerosis and superior semicircular canal dehiscence syndrome...
June 27, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28653118/quantitative-pneumatic-otoscopy-using-a-light-based-ranging-technique
#14
Ryan L Shelton, Ryan M Nolan, Guillermo L Monroy, Paritosh Pande, Michael A Novak, Ryan G Porter, Stephen A Boppart
Otitis media is the leading cause of hearing loss in children. It is commonly associated with fluid in the ear, which can result in up to 45 dB of hearing loss for extended periods of time during a child's most important developmental years. Accurate assessment of middle ear effusions is an important part of understanding otitis media. Current technologies used to diagnose otitis media with effusion are pneumatic otoscopy, tympanometry, and acoustic reflectometry. While all of these techniques can reasonably diagnose the presence of an effusion, they provide limited information about the infection present behind the tympanic membrane...
June 26, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28634733/dynamic-properties-of-human-tympanic-membrane-after-exposure-to-blast-waves
#15
Warren G Engles, Xuelin Wang, Rong Z Gan
Blast overpressure causes dynamic damage to middle ear components, and tympanic membrane (TM) rupture is the most frequent middle ear injury. However, it is unclear how the blast waves change mechanical properties of the TM and affect sound transmission through the ear. This paper reports the current study on dynamic properties of the TM after exposure to blast waves by using acoustic loading and laser Doppler vibrometry (LDV). The TM specimens were prepared from human temporal bones following exposures to blast overpressure...
June 20, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28608748/tympanic-membrane-and-ossicular-sparing-modified-lateral-temporal-bone-resection
#16
Yaser Ghavami, Yarah M Haidar, Marlon Maducdoc, Tjoson Tjoa, Omid Moshtaghi, Harrison W Lin, Hamid R Djalilian
A modified lateral temporal bone resection (mLTBR) is a unique technique that spares the tympanic membrane (TM) and ossicles in select patients with squamous cell carcinoma (SCCa). The records of 5 patients with SCCa of the temporal bone with negative frozen-section biopsy at the tympanic annulus were reviewed. The mean follow-up time for the patients was 29.2 months. One patient received postoperative radiation due to cervical nodal extracapsular spread. All patients were recurrence free as of the most recent follow-up (range, 8-50 months)...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28608739/safety-of-repeated-dose-intratympanic-injections-with-am-101-in-acute-inner-ear-tinnitus
#17
Hinrich Staecker, Michael Morelock, Timothy Kramer, Pavel Chrbolka, Joong Ho Ahn, Thomas Meyer
Objective To evaluate the safety and tolerability of repeated intratympanic administration of the gel-formulated NMDA receptor antagonist AM-101 in acute patients with inner ear tinnitus. Study Design Prospective, double-blind, randomized, placebo-controlled study. Setting Sixty-nine secondary and tertiary sites in North America, Europe, and Asia. Subjects and Methods In total, 343 subjects with persistent acute tinnitus after traumatic cochlear injury or otitis media were randomized to receive 3 intratympanic doses of either AM-101 0...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28608552/a-perspective-on-stem-cell-therapy-for-ear-disorders
#18
Rahul Mittal, Hyunseo D Jung, Jeenu Mittal, Adrien A Eshraghi
The use of stem cells in cell-based therapy is an emerging concept for the treatment of ear disorders. Tympanic membrane perforation (TMP) and inner ear disorders are some of the most commonly presented otologic disorders that can benefit from advances in cell-based therapy. Studies have already demonstrated that stem cell-based therapy can potentially be an effective treatment modality for acute and chronic TMP. Recent studies have also shown promise in application of cell-based approach to treat inner ear dysfunction...
June 13, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28607890/endoscopic-tympanoplasty-using-nasal-septal-cartilage-allograft
#19
N Ahilasamy, Badra Shanti, Sivaprakasam Rajasekaran
The purpose of the study was to analyze the morphological and functional outcomes in a series of 60 patients for whom Type I tympanoplasty was done using alcohol preserved nasal septal cartilage allograft through endoscopic permeatal route. The study was a prospective, interventional (surgical) study of 60 patients between October 2012 and September 2014. Patients were operated using 0°, 4 mm, 18 cm long Hopkin's rod endoscope through permeatal route. 70% ethyl alcohol preserved allogeneic nasal septal cartilage with thickness of around 0...
June 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28606657/the-effects-of-fibroblast-growth-factor-2-delivered-via-a-gelfoam-patch-on-the-regeneration-of-myringosclerotic-traumatic-eardrum-perforations-lying-close-to-the-malleus
#20
Zhong-Hai Jin, Yi-Han Dong, Zi-Han Lou
OBJECTIVE: We evaluated the effects of fibroblast growth factor-2 (FGF-2) delivered via a Gelfoam patch on the regeneration of myringosclerotic traumatic tympanic membrane perforations (TMPs) lying close to the malleus. STUDY DESIGN: A prospective, randomized, controlled clinical study. SETTING: A university-affiliated teaching hospital. SUBJECTS AND METHODS: We prospectively analyzed, in a randomized manner, the outcomes of treatment for traumatic TMPs constituting >25% of the tympanic membrane...
June 9, 2017: American Journal of Otolaryngology
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