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https://www.readbyqxmd.com/read/28538470/progression-of-unilateral-hearing-loss-in-children-with-and-without-ipsilateral-cochlear-nerve-canal-stenosis-a-hazard-analysis
#1
Patricia L Purcell, Justin R Shinn, Scott S Coggeshall, Grace Phillips, Angelisa Paladin, Kathleen C Y Sie, David L Horn
OBJECTIVE: To investigate the risk of hearing loss progression in each ear among children with unilateral hearing loss associated with ipsilateral bony cochlear nerve canal (BCNC) stenosis. SETTING: Tertiary pediatric referral center. PATIENTS: Children diagnosed with unilateral hearing loss who had undergone temporal bone computed tomography imaging and had at least 6 months of follow-up audiometric testing were identified from a prospective audiological database...
May 22, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28535131/detection-of-deafness-in-puppies-using-a-hand-held-otoacoustic-emission-screener
#2
Michael H Sims, Erin Plyler, Ashley Harkrider, Karen McLucas
The purpose of this study was to evaluate the use of a hand-held otoacoustic emissions screener to detect deafness in puppies. Specifically, distortion product otoacoustic emissions were recorded from 34 puppies (both sexes) of a variety of breeds, from 6-10 wk of age, and the results were compared to brainstem auditory evoked responses (BAER) recorded from the same puppies. Recordings were obtained from both ears in awake or lightly anesthetized puppies, and the results from each ear were compared. In all 62 ears that had normal BAERs, the distortion product otoacoustic emissions screener gave a response of "Pass...
May 23, 2017: Journal of the American Animal Hospital Association
https://www.readbyqxmd.com/read/28535123/topical-otic-drugs-in-a-multi-purpose-manufacturing-facility-a-guide-on-determination-and-application-of-permitted-daily-exposure-pde
#3
Lisa Wiesner, Maarten Prause, Ester Lovsin Barle
Due to newly introduced EU GMP guideline for Medicinal Products for Human and Veterinary use (PIC/S, 2015), product specific PDE for toxicological evaluation in multi-purpose facilities are required within a documented process for risk assessment. EMA (2014) guidance on setting PDE limits so far focused on systemic administration routes such as IV, oral or inhalation. This manuscript wants to give guidance on setting PDE values for risk management purposes in multi-purpose facilities for Active Pharmaceutical Ingredients (APIs) applied as topical otic drugs to the outer ear canal...
May 23, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28534730/big-stimulus-little-ears-safety-in-administering-vestibular-evoked-myogenic-potentials-in-children
#4
Megan L A Thomas, Denis Fitzpatrick, Ryan McCreery, Kristen L Janky
BACKGROUND: Cervical and ocular vestibular-evoked myogenic potentials (VEMPs) have become common clinical vestibular assessments. However, VEMP testing requires high intensity stimuli, raising concerns regarding safety with children, where sound pressure levels may be higher due to their smaller ear canal volumes. PURPOSE: The purpose of this study was to estimate the range of peak-to-peak equivalent sound pressure levels (peSPLs) in child and adult ears in response to high intensity stimuli (i...
May 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28532527/how-i-do-it-underwater-endoscopic-ear-surgery-for-plugging-in-superior-canal-dehiscence-syndrome
#5
D Yamauchi, Y Hara, H Hidaka, T Kawase, Y Katori
BACKGROUND: Underwater endoscopic ear surgery does not require suction and so protects the inner ear from unexpected aeration that may damage its function in the treatment of labyrinthine fistula. A method of underwater endoscopic ear surgery is proposed for the treatment of superior canal dehiscence. METHODS: Underwater endoscopic ear surgery was performed for plugging of the superior semicircular canal through the transmastoid approach. Saline solution was infused into the mastoid cavity through an Endo-Scrub Lens Cleaning Sheath...
May 23, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28530447/middle-ear-function-and-pathophysiology-in-andean-children-living-at-high-altitudes
#6
S Allen Counter, Leo H Buchanan, Fernando Ortega, Anthony B Jacobs, Göran Laurell
Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B. Jacobs, and Göran Laurell. Middle ear function and pathophysiology in Andean children living at high altitudes. High Alt Med Biol 00:000-000, 2017.-The extent of altitude-related middle ear disorders in children native to high altitudes is unclear. This study examined middle ear pathophysiology in two groups of children living in high-altitude Ecuadorian Andean communities by investigating middle ear pressure (MEP), tympanic membrane compliance (TMC), and ear canal volume (ECV) using tympanometry, and by otological examination...
May 22, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28516966/expanded-transcanal-transpromontorial-approach-to-the-internal-auditory-canal-and-cerebellopontine-angle-a-cadaveric-study
#7
L Presutti, M Bonali, D Marchioni, G Pavesi, A Feletti, L Anschuetz, M Alicandri-Ciufelli
The aim of this paper is to describe and evaluate the feasibility of an expanded endoscopic transcanal transpromotorial approach (ExpTTA) to the internal auditory canal and the cerebellopontine angle. To this end, we performed a cadaveric dissection study in September 2015. In total, 2 heads (4 sides) were dissected focusing on anatomical landmarks and surgical feasibility. Data from dissections were reviewed and analysed for further consideration. In all 4 sides of the cadavers the procedure was feasible. In all cadavers, it was necessary to extensively drill the temporo-mandibular joint and to calibrate the external ear canal to allow adequate room to manoeuver the instruments and optics and to comfortably access the cerebellopontine angle...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28516487/the-petrosal-and-bony-labyrinth-of-diplobune-minor-an-enigmatic-artiodactyla-from-the-oligocene-of-western-europe
#8
Maeva J Orliac, Ricardo Araújo, Fabrice Lihoreau
Anoplotheriinae are Paleogene European artiodactyls that present a unique postcranial morphology with a tridactyl autopodium and uncommon limb orientation. This peculiar morphology led to various hypotheses regarding anoplotheriine locomotion from semiaquatic to partly arboreal or partly bipedal. The petrosal bone, housing the organs of balance, and hearing, offers complementary information to postcranial morphology on the ecology of this uncommon artiodactyl. Here, we investigate the middle ear and bony labyrinth of the small anoplotheriine Diplobune minor based on four specimens from the Early Oligocene locality of Itardies (Quercy, France)...
May 17, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28503164/superior-canal-dehiscence-syndrome-lessons-from-the-first-20-years
#9
REVIEW
Bryan K Ward, John P Carey, Lloyd B Minor
Superior semicircular canal dehiscence syndrome was first reported by Lloyd Minor and colleagues in 1998. Patients with a dehiscence in the bone overlying the superior semicircular canal experience symptoms of pressure or sound-induced vertigo, bone conduction hyperacusis, and pulsatile tinnitus. The initial series of patients were diagnosed based on common symptoms, a physical examination finding of eye movements in the plane of the superior semicircular canal when ear canal pressure or loud tones were applied to the ear, and high-resolution computed tomography imaging demonstrating a dehiscence in the bone over the superior semicircular canal...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28498268/transcanal-endoscopic-ear-surgery-for-excision-of-a-facial-nerve-venous-malformation-with-interposition-nerve-grafting-a-case-report
#10
Cameron C Wick, Mark Sakai, Timothy E Richardson, Brandon Isaacson
OBJECTIVE: To illustrate a novel approach for the surgical management of a venous malformation of the facial nerve, including interposition nerve grafting, via an exclusively transcanal endoscopic ear surgery (TEES) approach. PATIENT: Thirty nine-year-old woman with a preoperative House-Brackmann (HB) grade IV facial paresis secondary to a facial nerve tumor. INTERVENTION(S): Surgical excision and interposition nerve graft via a transcanal endoscopic approach...
May 11, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28492927/prevalence-of-auditory-problems-in-children-with-feeding-and-swallowing-disorders
#11
Vishakha Waman Rawool
Purpose: Although an interdisciplinary approach is recommended for assessment and management of feeding or swallowing difficulties, audiologists are not always included in the interdisciplinary team. The purpose of this study is to report the prevalence of middle ear and hearing problems in children with feeding and swallowing disorders and to compare this prevalence with that in typical children. Method: A total of 103 children were included in the study: 44 children with feeding and swallowing disorders and 59 children without any such disorders...
May 24, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28491450/contribution-of-oral-triamcinolone-to-treating-proliferative-and-necrotising-otitis-externa-in-a-14-year-old-persian-cat
#12
Yutaka Momota, Junya Yasuda, Nobuaki Arai, Masami Yamamoto, Hisashi Yoshimura, Mitsutaka Ikezawa, Shuji Suzuki, Kimimasa Takahashi, Toshinori Sako
CASE SUMMARY: A 14-year-old female spayed cat was referred for recurrent otitis externa and unusual proliferative lesions in both ear canals. The affected pinnae and external ear canals were covered with large reddish-to-dark-brown verrucous and necrotic tissue. Friable material and exudates occluded both ear canals. Proliferative lesions developed in both ears 2-3 weeks before referral. The histopathological diagnosis from two biopsies obtained from the friable materials with endoscopic biopsy forceps was proliferative and necrotising otitis externa (PNOE)...
January 2017: JFMS Open Rep
https://www.readbyqxmd.com/read/28490727/syringocystadenoma-papilliferum-of-the-external-auditory-canal
#13
Luca Bruschini, Annalisa Ciabotti, Andrea De Vito, Francesca Forli, Christina Cambi, Eugenio Maria Ciancia, Stefano Berrettini
BACKGROUND Ceruminous glands are modified apocrine glands, situated in the external auditory canal, that, together with sebaceous glands, produce cerumen, better known as ear wax. The neoplastic transformation of these structures is very rare and there have been few cases reported in the literature. CASE REPORT Syringocystadenoma papilliferum is one of the rarest tumors among benign tumors arising from the ceruminous glands. We here report the case of a 72-year-old man with a lesion histologically documented as a syringocystadenoma papilliferum and we review the literature, focusing our attention on clinical features and treatment options of benign glandular tumors arising from the external auditory canal...
May 11, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28487108/temporomandibular-joint-capsule-rupture-presenting-as-expandable-ear-canal-mass
#14
Wan-Hsuan Sun, Pa-Chun Wang
No abstract text is available yet for this article.
May 6, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28485088/determining-fitting-ranges-of-various-bone-conduction-hearing-aids
#15
Denise C P B M van Barneveld, Herman J W Kok, John F P Noten, Arjan J Bosman, Ad F M Snik
OBJECTIVES: To define fitting ranges for nine bone conduction devices (BCDs) over different frequencies based on the device's maximum power output (MPO) and to validate the assessment of MPO of bone conduction devices in the ear canal. BACKGROUND: MPO is an important characteristic when fitting bone conduction devices. It is the highest output level a device can deliver and is one of the major determinants of a device's fitting range. A skull simulator can be used to verify MPO of percutaneous bone conduction devices...
May 9, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28484680/superior-semicircular-canal-dehiscence-in-a-patient-with-ehlers-danlos-syndrome-a-case-report
#16
Lawrance K Chung, Carlito Lagman, Daniel T Nagasawa, Quinton Gopen, Isaac Yang
Superior semicircular canal dehiscence (SSCD) is a bony defect in the middle cranial fossa floor that results in an abnormal connection between the inner ear and cranial vault. Although the etiology of SSCD remains unclear, an inappropriately thin or fragile temporal bone likely predisposes an individual towards developing SSCD. Ehlers-Danlos syndrome (EDS) constitutes a group of genetic connective tissue disorders caused by a defect in the production, processing, or structure of collagen, or its associated proteins...
April 6, 2017: Curēus
https://www.readbyqxmd.com/read/28481172/clinical-decision-making-to-address-poor-outcomes-in-persistent-horizontal-semicircular-canal-benign-paroxysmal-positional-vertigo-a-case-study
#17
Brian M Moore
BACKGROUND: Horizontal semicircular canal BPPV (HSC-BPPV) can occur in 10-30% of BPPV cases. Lower success rates are reported for HSC-BPPV. The apogeotropic form of HSC-BPPV is more difficult to treat, as 5-40% of cases are described to be refractory to repositioning maneuvers. PURPOSE: To describe the assessment and treatment of a patient presenting with HSC-BPPV and to demonstrate the potential use of Forced-Prolonged Positioning (FPP) as a home exercise program (HEP) for persistent HSC-BPPV in an elderly patient...
May 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28477092/-intracochlear-schwannoma-tumor-removal-via-subtotal-cochleostomy-and-partial-cochlear-reconstruction-with-preservation-of-semicircular-canal-function-german-version
#18
S Plontke, S Kösling, N Pazaitis, T Rahne
We report about a patient who in 2005, aged 37 years, experienced sudden mild to moderate, mid-frequency sensorineural hearing loss in the right ear along with tinnitus and mild dizziness. MRI of the temporal bone revealed a very small (1 mm) contrast-enhancing lesion in the second turn of the right cochlea. Hearing gradually deteriorated with complete hearing loss in 2015. At this time, an MRI scan showed a lesion completely filling the cochlea.The tumor was removed via transmeatal subtotal cochleostomy...
May 5, 2017: HNO
https://www.readbyqxmd.com/read/28475547/prediction-of-intraoperative-csf-gusher-and-postoperative-facial-nerve-stimulation-in-patients-with-cochleovestibular-malformations-undergoing-cochlear-implantation-surgery
#19
Teru Kamogashira, Shinichi Iwasaki, Akinori Kashio, Akinobu Kakigi, Shotaro Karino, Yu Matsumoto, Tatsuya Yamasoba
OBJECTIVE: To determine parameters in computed tomography (CT) of the temporal bone that would be useful for prediction of cerebrospinal fluid (CSF) gusher during cochlear implantation (CI) surgery and postoperative facial nerve stimulation (FNS) in patients with inner ear malformations. STUDY DESIGN: Retrospective study. SETTING: Tertiary referral center. PATIENTS: Three hundred seventy-five cases who had undergone CI surgery including 54 inner ear malformation cases were analyzed...
May 4, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28473682/bilateral-microtia-canal-atresia-and-aplasia-of-cochleovestibular-nerve
#20
A Asma, A R Roslenda, I Fadzilah, A Mazita, M B Marina, A Ab Aziz
A six-month-old baby with congenital patent ductus arteriosus (PDA), bilateral microtia and canal atresia was referred for hearing assessment. The audiology assessment revealed bilateral profound hearing loss, which is atypical for a case of pure canal atresia. Imaging was performed much earlier than usual and, as suspected, the patient also had bilateral severe inner ear anomaly. It is extremely rare for a person to have both external and inner ear anomaly because of the different embryological origin. The only suitable hearing rehabilitation option for this kind of patients is brainstem implant...
April 2017: Medical Journal of Malaysia
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