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https://www.readbyqxmd.com/read/28197707/hearing-loss-in-vitiligo-current-concepts-and-review
#1
REVIEW
Marrigje Aagje de Jong, Cahtia Adelman, Menachem Gross
The objective of this study was to describe the occurrence, clinical manifestations, audiometric findings, pathogenesis and approach to sensorineural hearing loss (SNHL) among patients diagnosed with vitiligo with a review of the literature. We present a systematic review of the literature on cases of SNHL in patients diagnosed with vitiligo and studies conducted to investigate audiometric changes in such patients. Data on presentation, diagnosis and medical approach were reviewed. A total of 21 studies and case reports revealed at least 102 cases of SNHL in patients diagnosed with vitiligo...
February 14, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28147610/evidence-for-apical-basal-transition-in-the-delay-of-the-reflection-components-of-otoacoustic-emissions
#2
A Moleti, D Pistilli, R Sisto
Stimulus-frequency, transient-evoked, and distortion product otoacoustic emissions (OAEs) have been measured in eight normal-hearing human ears over a wide stimulus level range, with high spectral resolution. The single-reflection component of the response was isolated using time-frequency filtering, and its average delay was measured as a function of frequency and stimulus level. The apical-basal transition was studied by fitting the average delay of the filtered single-reflection OAEs, expressed in number of cycles, to a three-slope power-law function with two knot frequencies...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28147590/compensating-for-ear-canal-acoustics-when-measuring-otoacoustic-emissions
#3
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/28137699/frequency-dependent-fine-structure-in-the-frequency-following-response-the-byproduct-of-multiple-generators
#4
Parker Tichko, Erika Skoe
The frequency-following response (FFR) is an auditory-evoked response recorded at the scalp that captures the spectrotemporal properties of tonal stimuli. Previous investigations report that the amplitude of the FFR fluctuates as a function of stimulus frequency, a phenomenon thought to reflect multiple neural generators phase-locking to the stimulus with different response latencies. When phase-locked responses are offset by different latencies, constructive and destructive phase interferences emerge in the volume-conducted signals, culminating in an attenuation or amplification of the scalp-recorded response in a frequency-specific manner...
January 27, 2017: Hearing Research
https://www.readbyqxmd.com/read/28110343/sex-related-cochlear-impairment-in-cigarette-smokers
#5
Grażyna Lisowska, Jerzy Jochem, Agata Gierlotka, Maciej Misiołek, Wojciech Ścierski
BACKGROUND A number of studies have documented the influence of cigarette smoking on hearing. However, the association between sex and hearing impairment in smokers as measured by otoacoustic emissions (OAEs) has not been clearly established. The aim of this study was to analyze sex-specific effects of smoking on hearing via conventional and ultra-high-frequency pure tone audiometry (PTA), and OAEs, specifically spontaneous OAEs, click-evoked OAEs, and distortion-product OAEs. MATERIAL AND METHODS The study included 84 healthy volunteers aged 25-45 years (mean 34), among them 46 women (25 non-smokers and 21 smokers) and 38 men (16 non-smokers and 22 smokers)...
January 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28102004/prevalence-and-causes-of-hearing-impairment-in-fundong-health-district-north-west-cameroon
#6
Silvia Ferrite, Islay Mactaggart, Hannah Kuper, Joseph Oye, Sarah Polack
OBJECTIVE: To estimate the prevalence and causes of hearing impairment in Fundong Health District, North West Cameroon. METHODS: We selected 51 clusters of 80 people through probability proportionate to size sampling. Initial hearing screening was undertaken through an otoacoustic emission (OAE) test. Participants aged 4+ years who failed this test in both ears or for whom an OAE reading could not be taken underwent a manual pure-tone audiometry (PTA) screening...
January 18, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28099390/to-nearly-come-full-circle-nonoperative-management-of-high-grade-iv-v-blunt-splenic-trauma-is-safe-utilizing-a-protocol-with-routine-angioembolization
#7
Indermeet S Bhullar, Joseph J Tepas, Daniel Siragusa, Todd Loper, Andrew Kerwin, Eric R Frykberg
INTRODUCTION: Nonoperative management (NOM) of hemodynamically stable high grade (IV-V) blunt splenic trauma (BST) remains controversial given the high failure rates (19%) that persist despite angioembolization (AE) protocols. The NOM protocol was modified in 2011 to include mandatory AE of all grade (IV-V) injuries without CB along with selective AE of grade (I-V) with CB. The purpose of this study was to determine if this new AE protocol significantly lowered the failure rates for grade (IV-V) injuries allowing for safe observation without surgery and if the exclusion of grade III injuries allowed for the prevention of unnecessary angiograms without affecting the overall failure rates...
January 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28079681/internal-jugular-vein-compression-a-novel-approach-to-mitigate-blast-induced-hearing-injury
#8
Brian Sindelar, Michael Shinners, Sydney Sherman, Kevin Novak, Kristine Erickson, Vimal Patel, Paul Kubilis, David Smith, John Finan, Julian E Bailes
HYPOTHESIS: Internal jugular vein (IJV) compression before blast injury will lead to reduced risk of traumatic hearing injury following exposure to a blast injury. BACKGROUND: IJV compression and its effects on not only intracranial, but also intracochlear pressure may potentiate blast induced hearing injury, therefore, precluding its use as a prophylactic therapy for blast induced traumatic brain injury. METHODS: Twenty Sprague Dawley rats were exposed to a 17...
January 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28045920/alterations-in-evoked-otoacoustic-emissions-by-the-use-of-meglumine-antimoniate-in-american-tegumentary-leishmaniasis-patients
#9
Débora Cristina de Oliveira Bezerra, Renata Oliveira de Barcelos, Ellen Carvalho de Castro, Claudia Cristina Jardim Duarte, Raquel de Vasconcellos Carvalhaes Oliveira, Tania Salgado de Sousa Torraca, Maria Helena de Araújo-Melo, Frederico Pereira Bom Braga, Benivaldo Ramos Ferreira Terceiro, Lúcia Regina do Nascimento Brahim Paes, Armando de Oliveira Schubach, Cláudia Maria Valete-Rosalino
INTRODUCTION: Tegumentary Leishmaniasis (TL) is a neglected, non-contagious, infectious disease, caused by different protozoa species of the Leishmania genus that affects skin and mucous membranes. Meglumine Antimoniate (MA), the first drug of choice for TL treatment in Brazil, has already been associated with cochlear toxicity, which is defined as damages of the cochlea caused by exposure to chemical substances, resulting in reversible or irreversible hearing loss. Auditory monitoring for cochlear toxicity aims at the early detection of auditory disorders, enabling, when possible, hearing to be preserved or an early auditory rehabilitation...
2017: PloS One
https://www.readbyqxmd.com/read/28040016/quasilinear-reflection-as-a-possible-mechanism-for-suppressor-induced-otoacoustic-emission
#10
Yi-Wen Liu, Tzu-Chi Liu
A frequency-domain iterative approach is developed to compute the change in characteristic impedance in the cochlea due to the presence of a suppressor tone. Based on this approach, a small transient wave passing by the best place (BP) of the suppressor is predicted to be partially reflected because of the suppressor-induced impedance variation. This computational approach is tested on a nonlinear model of cochlear mechanics [Liu, J. Acoust. Soc. Am. 136, 1788-1796 (2014)]. When a 9-kHz suppressor at 60 dB sound pressure level is delivered to the model, the characteristic impedance decreases by ∼20% near its BP...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28012542/audiological-findings-in-children-with-ataxia-telangiectasia-a-t-syndrome
#11
Pretty O Afifi, Hanaa Hussein Elsanadiky
AIM: To assess peripheral and central hearing in children with A-T. METHOD: 3 children diagnosed with A-T according to the diagnostic criteria for A-T of the European Society for Immunodeficiencies. Involuntary movements were seen in the form of chorea-athetosis together with tremors. They were examined to assess both peripheral and central hearing was assessed (hearing thresholds). Sound-field testing, tympanometry, acoustic reflexes, Otoacoustic Emissions (OAEs) and Auditory Brainstem Responses (ABR) were done for all of them...
January 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27991472/modeling-signal-to-noise-ratio-of-otoacoustic-emissions-in-workers-exposed-to-different-industrial-noise-levels
#12
Parvin Nassiri, Sajad Zare, Mohammad R Monazzam, Akram Pourbakht, Kamal Azam, Taghi Golmohammadi
INTRODUCTION: Noise is considered as the most common cause of harmful physical effects in the workplace. A sound that is generated from within the inner ear is known as an otoacoustic emission (OAE). Distortion-product otoacoustic emissions (DPOAEs) assess evoked emission and hearing capacity. The aim of this study was to assess the signal-to-noise ratio in different frequencies and at different times of the shift work in workers exposed to various levels of noise. It was also aimed to provide a statistical model for signal-to-noise ratio (SNR) of OAEs in different frequencies based on the two variables of sound pressure level (SPL) and exposure time...
November 2016: Noise & Health
https://www.readbyqxmd.com/read/27989947/otoacoustic-emission-estimates-of-human-basilar-membrane-impulse-response-duration-and-cochlear-filter-tuning
#13
Stefan Raufer, Sarah Verhulst
This study describes a method based on temporal suppression of click-evoked otoacoustic emissions (CEOAEs) to estimate the time course and duration of human basilar membrane impulse responses (BM IRs). This was achieved by tracing the suppression of dominant peaks in the CEOAE spectrum as a function of the temporal separation between two equal-level stimulus clicks. The relationship between the suppression pattern and underlying BM IR duration near the generation site of the CEOAE frequency was established using model simulations...
October 27, 2016: Hearing Research
https://www.readbyqxmd.com/read/27957560/auditory-and-nonauditory-effects-of-ultrasonic-scaler-use-and-its-role-in-the-development-of-permanent-hearing-loss
#14
Aditi Chopra, Betsy S Thomas, Kishan Mohan, Karthik Sivaraman
PURPOSE: To evaluate the negative auditory and non-auditory effects developed immediately after using ultrasonic scalers and their potential role in the development of permanent hearing loss. MATERIALS AND METHODS: The auditory functions of 60 dental clinicians were evaluated with the pure tone audiometry test (PTA), tympanogram and the otoacoustic emission test (OAE) before and immediately after using ultrasonic scalers. The paired t-test was used to evaluate the difference in the pre- and post-exposure recordings for all three tests...
2016: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/27914370/concurrent-measures-of-contralateral-suppression-of-transient-evoked-otoacoustic-emissions-and-of-auditory-steady-state-responses
#15
Ian B Mertes, Marjorie R Leek
Contralateral suppression of otoacoustic emissions (OAEs) is frequently used to assess the medial olivocochlear (MOC) efferent system, and may have clinical utility. However, OAEs are weak or absent in hearing-impaired ears, so little is known about MOC function in the presence of hearing loss. A potential alternative measure is contralateral suppression of the auditory steady-state response (ASSR) because ASSRs are measurable in many hearing-impaired ears. This study compared contralateral suppression of both transient-evoked otoacoustic emissions (TEOAEs) and ASSRs in a group of ten primarily older adults with either normal hearing or mild sensorineural hearing loss...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27873084/distortion-product-otoacoustic-emission-measured-below-300%C3%A2-hz-in-normal-hearing-human-subjects
#16
Anders T Christensen, Rodrigo Ordoñez, Dorte Hammershøi
Physiological noise levels in the human ear canal often exceed naturally low levels of otoacoustic emissions (OAEs) near the threshold of hearing. Low-frequency noise, and electronic filtering to cope with it, has effectively limited the study of OAE to frequencies above about 500 Hz. Presently, a custom-built low-frequency acoustic probe was put to use in 21 normal-hearing human subjects (of 34 recruited). Distortion-product otoacoustic emission (DPOAE) was measured in the enclosed ear canal volume as the response to two simultaneously presented tones with frequencies f 1 and f 2...
November 21, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27863646/regenerative-efficacy-of-mesenchymal-stromal-cells-from-human-placenta-in-sensorineural-hearing-loss
#17
Kicheol Kil, Mi Young Choi, Ji Sun Kong, Woo Jin Kim, Kyoung Ho Park
INTRODUCTION: Hearing loss is a common chronic disorder characterized by decline of auditory function. The global population have suffered from deafness and the transplantation of stem cells is regarded as a therapeutic strategy for this disease. METHODS: We collected placenta from a total of 13 samples of full term pregnant women and isolated MSCs derived from human placenta and transplanted MSCs on deaf animal model. The normal group and the sensorineural hearing loss (SNHL) group and the experimental (transplanted MSCs) group were compared and estimated hearing level using auditory brainstem response (ABR) recordings and the otoacoustic emission (OAE) test...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27863036/newborn-hearing-screening-in-prematurity-fate-of-screening-failures-and-auditory-maturation
#18
H C Yang, C M Sung, D J Shin, Y B Cho, C H Jang, H-H Cho
OBJECTIVES: The purpose of this study was to identify delayed auditory maturation and the fate of premature infants who failed the newborn hearing screening (NHS) in neonatal intensive care unit. MATERIALS AND METHODS: A total of 1375 neonates underwent NHS using the transient evoked otoacoustic emission (TEOAE) in a tertiary hospital between 2007 and 2010 according to the Joint Committee on Infant Hearing guidelines. In addition, a structured telephone survey was given to caregivers of infants who were lost to follow-up NHS...
November 12, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27849126/tinnitus-and-leisure-noise
#19
Warwick Williams, Lyndal Carter
OBJECTIVE: To study the relationship of life-time noise exposure and experience of tinnitus. DESIGN: Audiometric measures included otoscopy, pure tone air- and bone-conduction hearing threshold levels (HTL) and otoacoustic emissions (OAEs). Participants completed questionnaires including demographic information, past hearing health, history of participation in loud leisure activities, and attitudes to noise. STUDY SAMPLE: A representative sample (1435) of the young (11-35 years old) Australian population...
November 16, 2016: International Journal of Audiology
https://www.readbyqxmd.com/read/27833865/audiological-and-electrophysiological-changes-in-patients-with-vitiligo
#20
Richa Arya, Sanjay Kumar Munjal, Naresh Kumar Panda, Davinder Prasad
The study was conducted to evaluate the audiological and electrophysiological findings in patients with Vitiligo and to compare the findings with otologically and audiologically normal controls. Study group included 50 subjects (25 Males, 25 Females) with Vitiligo (Mean age-27.4 years) and control group contained 40 age-matched normal hearing subjects. Pure tone audiometry (PTA) with extended high frequency audiometry, Otoacoustic emissions (OAEs), Tympanometry, Auditory brainstem responses (ABR) and Middle latency responses (MLR) were conducted in all subjects...
December 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
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