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https://www.readbyqxmd.com/read/28208894/case-report-of-youngest-successful-bilateral-cartilage-tympanoplasty-in-india
#1
Gaurav Ashish, Ankita Gupta
Paediatric Chronic Suppurative Otitis Media (CSOM) remains a challenge for the treating otologists. Usually, concurrent foci of infection lie in the oropharynx or nasopharynx and treating these eventually leads to resolution of ear discharge. However, refractory cases can be threatening in view of complications secondary to CSOM. A two year and 10-month-old child presented with recurrent profuse mucopurulent ear discharge which had been refractory to multiple medical treatment. Recently she had recurrent otitis external episodes with excoriations of canal skin...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208893/comparative-evaluation-of-mastoid-cavity-obliteration-by-vascularised-temporalis-myofascial-flap-and-deep-temporal-fascial-periosteal-flap-in-canal-wall-down-mastoidectomy
#2
Navjot Kaur, Dinesh Kumar Sharma, Jagdeepak Singh
INTRODUCTION: A consensus is emerging amongst otologists that obliteration of the mastoid cavity that results after modified radical mastoidectomy is a sound option to prevent cavity related problems such as otorrhoea, infection, granulation tissue and hearing loss. A variety of techniques have been proposed to perform the obliteration. AIM: The present study aimed to compare the conventional method of mastoid cavity obliteration by vascularised temporalis myofascial flap with deep temporal fascial-periosteal flap in canal wall down mastoidectomy...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207625/a-three-dimensional-geometric-morphometric-study-to-quantify-temporal-bone-growth-and-its-consequences-for-the-success-of-implanting-bone-anchored-hearing-devices
#3
Sebastian Schilde, Stefan K Plontke, Torsten Rahne
OBJECTIVE: A computed tomography (CT)-based morphological-investigation to describe temporal bone growth and to devise a predictive test of the likely success of Bonebridge implantation into the growing mastoid region of the temporal bone in young patients. STUDY DESIGN: Retrospective cross-sectional study. SETTING: University Hospital Halle (Saale), Germany. PATIENTS: Two cohorts participated. This first, of patients aged less than 21 years, comprised 42 men, and 33 women patients...
February 15, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28193471/contralateral-occlusion-test-the-effect-of-external-ear-canal-occlusion-on-hearing-thresholds
#4
Luis Roque Reis, Paulo Fernandes, Pedro Escada
INTRODUCTION AND GOALS: Bedside testing with tuning forks may decrease turnaround time and improve decision making for a quick qualitative assessment of hearing loss. The purpose of this study was to quantify the effects of ear canal occlusion on hearing, in order to decide which tuning fork frequency is more appropriate to use for quantifying hearing loss with the Contralateral Occlusion Test. METHODS: Twenty normal-hearing adults (forty ears) underwent sound field pure tone audiometry with and without ear canal occlusion...
February 10, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28185320/orientation-of-the-lateral-semicircular-canal-in-xenarthra-and-its-links-with-head-posture-and-phylogeny
#5
Florence Coutier, Lionel Hautier, Raphaël Cornette, Eli Amson, Guillaume Billet
The orientation of the semicircular canals of the inner ear in the skull of vertebrates is one of the determinants of the capacity of this system to detect a given rotational movement of the head. Past functional studies on the spatial orientation of the semicircular canals essentially focused on the lateral semicircular canal (LSC), which is supposedly held close to horizontal during rest and/or alert behaviors. However, they generally investigated this feature in only a few and distantly related taxa. Based on 3D-models reconstructed from µCT-scans of skulls, we examined the diversity of orientations of the LSC within one of the four major clades of placental mammals, that is, the superorder Xenarthra, with a data set that includes almost all extant genera and two extinct taxa...
February 10, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28178096/relative-location-of-fundus-meatus-acustici-interni-via-porus-acusticus-internus-in-facial-nerve-decompression
#6
Xu Liu, Haodong Wang, Kailiang Cheng, Youqiong Li
Facial neural edema is the pathophysiological base of Bell's palsy. The middle cranial fossa approach is used to relieve the oppression of facial nerve at its most narrow course in the facial canal. In this research, the authors mainly discussed the internal auditory canal segment of facial nerve, completely in the shadow of the bony structure, which is inconvenient for transmastoid decompression. Therefore, the objective was to explore the definite position of the fundus meatus acustici interni from internal acoustic pore...
February 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28177336/nystagmus-intensity-and-direction-in-bow-and-lean-test-an-aid-to-diagnosis-of-lateral-semicircular-canal-benign-paroxysmal-positional-vertigo
#7
V Marcelli
The objective was to evaluate nystagmus intensity and direction (NID) during bow and lean test (BLT) in subjects suffering from idiopathic lateral semicircular canal benign paroxysmal positional vertigo (LSC-BPPV), in order to differentiate between the geotropic and the apogeotropic form and to determine the affected ear before using classic diagnostic procedures. The BLT was performed in 32 subjects affected by LSC-BPPV. "Nystagmus intensity" evaluation allows distinguishing the geotropic variant from the apogeotropic one, while the "nystagmus direction" allows identification of the side...
December 2016: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28173896/effects-of-a-sensory-branch-to-the-posterior-external-ear-canal-coughing-pain-ramsay-hunt-s-syndrome-and-hitselberger-s-sign
#8
S Mulazimoglu, R Flury, S Kapila, T Linder
BACKGROUND: A distinct nerve innervating the external auditory canal can often be identified in close relation to the facial nerve when gradually thinning the posterior canal wall. This nerve has been attributed to coughing during cerumen removal, neuralgic pain, Hitselberger's sign and vesicular eruptions described in Ramsay Hunt's syndrome. This study aimed to demonstrate the origin and clinical impact of this nerve. METHODS AND RESULTS: In patients with intractable otalgia or severe coughing whilst inserting a hearing aid, who responded temporarily to local anaesthesia, the symptoms could be resolved by sectioning a sensory branch to the posterior canal...
February 8, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28170434/the-internal-cranial-anatomy-of-romundina-stellina-%C3%A3-rvig-1975-vertebrata-placodermi-acanthothoraci-and-the-origin-of-jawed-vertebrates-anatomical-atlas-of-a-primitive-gnathostome
#9
Vincent Dupret, Sophie Sanchez, Daniel Goujet, Per Erik Ahlberg
Placoderms are considered as the first jawed vertebrates and constitute a paraphyletic group in the stem-gnathostome grade. The acanthothoracid placoderms are among the phylogenetically most basal and morphologically primitive gnathostomes, but their neurocranial anatomy is poorly understood. Here we present a near-complete three-dimensional skull of Romundina stellina, a small Early Devonian acanthothoracid from the Canadian Arctic Archipelago, scanned with propagation phase contrast microtomography at a 7...
2017: PloS One
https://www.readbyqxmd.com/read/28169838/estimation-of-minor-conductive-hearing-loss-in-humans-using-distortion-product-otoacoustic-emissions
#10
Steven C Marcrum, Peter Kummer, Thomas Steffens
OBJECTIVES: Conductive hearing loss (CHL) systematically alters distortion product otoacoustic emission (DPOAE) levels through attenuation of both the primary tones and the evoked response by the middle ear, as well as through modification of the effective L1-L2 relationship within the cochlea. It has been postulated that, if optimal primary tone level relationships for an ear without CHL are known or can be estimated accurately and a CHL can be presumed to attenuate both primary tones to a similar extent, the adjustment to L1 required to restore an optimal L1-L2 separation following CHL induction can be utilized to estimate CHL magnitude objectively...
February 6, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28168899/correlation-of-objective-audiometric-and-caloric-function-in-m%C3%A3-ni%C3%A3-re-s-disease
#11
Kyle P McMullen, Chen Lin, Michael S Harris, Oliver F Adunka
Objective Ménière's disease affects the vestibular and audiologic systems; however, little is known about the relationship between audiometric and caloric function with increasing duration of disease. We employed a novel methodology to understand the longitudinal correlation between audiometric and caloric function in Ménière's patients. Study Design Case series with chart review. Setting Neuro-otologic tertiary care practice. Subjects and Methods Charts of 19 patients with unilateral Ménière's disease, as classified by the 1995 American Academy of Otolaryngology-Head and Neck Foundation criteria, were examined...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28164933/using-auditory-steady-state-responses-for-measuring-hearing-protector-attenuation
#12
Olivier Valentin, Sasha M John, Frédéric Laville
INTRODUCTION: Present methods of measuring the attenuation of hearing protection devices (HPDs) have limitations. Objective measurements such as field microphone in real-ear do not assess bone-conducted sound. Psychophysical measurements such as real-ear attenuation at threshold (REAT) are biased due to the low frequency masking effects from test subjects' physiological noise and the variability of measurements based on subjective responses. An auditory steady-state responses (ASSRs) procedure is explored as a technique which might overcome these limitations...
January 2017: Noise & Health
https://www.readbyqxmd.com/read/28159525/celsr1-coordinates-the-planar-polarity-of-vestibular-hair-cells-during-inner-ear-development
#13
Jeremy S Duncan, Michelle L Stoller, Andrew F Francl, Fadel Tissir, Danelle Devenport, Michael R Deans
Vestibular hair cells of the inner ear are specialized receptors that detect mechanical stimuli from gravity and motion via the deflection of a polarized bundle of stereocilia located on their apical cell surfaces. The orientation of stereociliary bundles is coordinated between neighboring cells by core PCP proteins including the large adhesive G-protein coupled receptor Celsr1. We show that mice lacking Celsr1 have vestibular behavioral phenotypes including circling. In addition, we show that Celsr1 is asymmetrically distributed at cell boundaries between hair cells and neighboring supporting cells in the developing vestibular and auditory sensory epithelia...
February 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28159186/foreign-body-in-external-ear-canal-an-unusual-cause-of-chronic-cough
#14
Kellyanne Rose Gold, Jacob L Wester, Robert Gold
No abstract text is available yet for this article.
January 31, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28158903/tympanomastoid-cholesterol-granulomas-immunohistochemical-evaluation-of-angiogenesis
#15
Giannicola Iannella, Cira Di Gioia, Raffaella Carletti, Giuseppe Magliulo
OBJECTIVES/HYPOTHESIS: This study investigates the immunohistochemical expression of vascular endothelial growth factor (VEGF) and CD34 in patients treated for middle ear and mastoid cholesterol granulomas to evaluate the angiogenesis and vascularization of this type of lesion. A correlation between the immunohistochemical data and the radiological and intraoperative evidence of temporal bone marrow invasion and blood source connection was performed to validate this hypothesis. STUDY DESIGN: Retrospective study...
February 3, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28154359/impairments-of-inner-ears-caused-by-physical-environmental-stresses
#16
Nobutaka Ohgami, Reina Oshino, Hiromasa Ninomiya, Xiang Li, Masashi Kato
The inner ears contain the organ of Corti, vestibule and semicircular canal. The organ of Corti is crucial for hearing, while the vestibule and semicircular canal play important roles in maintaining balance. Exposure to noise at excessive levels is known to cause damages of the inner ears, resulting in noise-induced hearing loss. On the other hand, noise levels (dB) are used for the evaluation of health risks by exposure to noise, although noise consists of sound with broad frequencies (Hz). Thus, information about the frequency-dependent effect of noise on health is largely unknown...
2017: Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
https://www.readbyqxmd.com/read/28147608/comparing-otoacoustic-emissions-evoked-by-chirp-transients-with-constant-absorbed-sound-power-and-constant-incident-pressure-magnitude
#17
Douglas H Keefe, M Patrick Feeney, Lisa L Hunter, Denis F Fitzpatrick
Human ear-canal properties of transient acoustic stimuli are contrasted that utilize measured ear-canal pressures in conjunction with measured acoustic pressure reflectance and admittance. These data are referenced to the tip of a probe snugly inserted into the ear canal. Promising procedures to calibrate across frequency include stimuli with controlled levels of incident pressure magnitude, absorbed sound power, and forward pressure magnitude. An equivalent pressure at the eardrum is calculated from these measured data using a transmission-line model of ear-canal acoustics parameterized by acoustically estimated ear-canal area at the probe tip and length between the probe tip and eardrum...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28147590/compensating-for-ear-canal-acoustics-when-measuring-otoacoustic-emissions
#18
Karolina K Charaziak, Christopher A Shera
Otoacoustic emissions (OAEs) provide an acoustic fingerprint of the inner ear, and changes in this fingerprint may indicate changes in cochlear function arising from efferent modulation, aging, noise trauma, and/or exposure to harmful agents. However, the reproducibility and diagnostic power of OAE measurements is compromised by the variable acoustics of the ear canal, in particular, by multiple reflections and the emergence of standing waves at relevant frequencies. Even when stimulus levels are controlled using methods that circumvent standing-wave problems (e...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28141649/values-range-of-tympanometric-gradient-in-otitis-media-with-effusion
#19
Sertac Duzer, Oner Sakallioglu, Abdulvahap Akyigit, Cahit Polat, Hasan Cetiner, Nihat Susaman
INTRODUCTION: The aim of this study was to establish how reliable a given tympanogram is in predicting the presence or absence of a middle ear effusion, and to provide new views for the diagnostic information of tympanometry. The use of tympanometric gradient in addition to static admittance is the focus of this study. MATERIALS AND METHODS: The authors enrolled 146 female and 129 male patients. The participants were allocated into groups as follow: Group A1 consisted of 50 healthy children...
January 30, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28141179/pedicled-temporalis-muscle-flap-stuffing-after-a-lateral-temporal-bone-resection-for-treating-mastoid-osteoradionecrosis
#20
Junming Chen, Feng Lin, Zhen Liu, Youjun Yu, Yuejian Wang
Objective The aim of this study was to compare the outcomes of lateral temporal bone resection and pedicled temporalis muscle flap stuffing with external auditory canal closure with those of canal wall down mastoidectomy for the treatment of mastoid osteoradionecrosis. Study Design Prospective nonrandomized case-control clinical study. Setting Department of Otolaryngology of the First People's Hospital of Foshan. Subjects and Methods Seventy-seven postirradiation nasopharyngeal carcinoma patients with mastoid osteoradionecrosis were included...
January 1, 2017: Otolaryngology—Head and Neck Surgery
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