scholarly journals Improving methods for diagnosing occupational hearing loss

2021 ◽  
Vol 100 (11) ◽  
pp. 1323-1327
Author(s):  
Alfiya D. Volgareva ◽  
Elmira R. Shaikhlislamova ◽  
Svetlana A. Gallyamova ◽  
Galina G. Gimranova ◽  
Inna V. Shapoval ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Short Latency ◽  
Control Group ◽  
Physical Factors ◽  
Occupational Noise ◽  
Number Of Patients ◽  
The Difference ◽  
Occupational Hearing Loss

Introduction. Since the share of sensorineural hearing loss in the structure of occupational morbidity in the Russian Federation increased by 1.5 times in 2018 compared to 2007, it is essential to ensure the reliability of the results of diagnostic studies to establish the fact of hearing impairment as a result of occupational noise. Materials and methods. Retrospectively for the period 2008-2017 the analysis of the prevalence and dynamics of occupational hearing loss in the Republic of Bashkortostan (RB) was carried out. Objectification of the state of the auditory sensory analyzer was carried out in 30 patients with occupational hearing loss using tonal threshold audiometry and registration of short-latency auditory evoked potentials. Results. In the RB, the number of occupational diseases caused by exposure to physical factors has doubled, mainly due to occupational hearing loss with a mild course of the process. The obtained indicators of short-latency auditory evoked potentials determined the difference in the latencies of the recorded potentials, amplitudes and intervals in persons with impaired auditory function of professional origin and in a group of persons from the control group who did not have industrial acoustic contact. Conclusion. The increase in the number of patients with occupational hearing loss requires the development of measures for their timely and objective diagnosis and medical care. The method of recording short-latency auditory evoked potentials is sensitive and quite informative in diagnosing hearing loss from exposure to occupational noise.

Threshold Estimation Using “Chained Stimuli” for Cortical Auditory Evoked Potentials in Individuals With Normal Hearing and Hearing Impairment

2019 ◽  
Vol 28 (2S) ◽  
pp. 428-436
Author(s):  
Mohan Kumar Kalaiah ◽  
Sanjana Poovaiah ◽  
Usha Shastri
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Testing Time ◽  
Threshold Estimation ◽  
Behavioral Threshold ◽  
Hearing Sensitivity ◽  
The Difference ◽  
Cortical Auditory Evoked Potentials

Purpose We investigated the utility of chained stimuli for threshold estimation using cortical auditory evoked potentials (CAEPs) in individuals with normal hearing sensitivity and hearing loss. The effect of the order of frequency in chained stimuli on CAEPs was also studied. Method Seventeen individuals with normal hearing and 17 individuals with mild to severe sensorineural hearing loss participated in the study. In individuals with normal hearing, CAEPs were recorded at 80 dB nHL for 4 chained stimuli with different orders of frequencies within them (Chained Stimuli 1 [CS1]: 500, 1000, 2000, 4000 Hz; Chained Stimuli 2: 4000, 2000, 1000, 500 Hz; Chained Stimuli 3: 500, 2000, 1000, 4000 Hz; Chained Stimuli 4: 4000, 1000, 2000, 500 Hz). CAEP threshold estimation was carried out using CS1 in both groups and was compared with behavioral pure-tone thresholds. Results CS1 elicited the largest amplitude responses at low and mid frequencies, whereas all 4 stimuli elicited similar amplitude responses at high frequencies. CAEP thresholds were generally within 10–20 dB above the participants' behavioral threshold in both groups. The difference between CAEP threshold and behavioral threshold was less for individuals with hearing loss compared to individuals with normal hearing. There was a significant positive correlation between CAEP threshold and behavioral threshold at all the frequencies. Conclusions CS1 could be used to elicit CAEPs for threshold estimation in adult participants with normal hearing and hearing loss of varied degrees with theoretically reduced testing time. The actual time reduction using chained stimuli and the correction factor to be applied to estimate behavioral threshold can be studied in future investigations.

Antioxidant Enzyme Levels Inversely Covary with Hearing Loss After Amikacin Treatment

2003 ◽  
Vol 14 (03) ◽  
pp. 134-143 ◽  
Author(s):  
James J. Klemens ◽  
Robert P. Meech ◽  
Larry F. Hughes ◽  
Satu Somani ◽  
Kathleen C.M. Campbell
Keyword(s):  
Hearing Loss ◽  
Enzyme Activity ◽  
Antioxidant Enzyme ◽  
Guinea Pigs ◽  
Auditory Brainstem ◽  
Antioxidant Enzyme Activity ◽  
Control Group ◽  
Glutathione S Transferase ◽  
Brainstem Response ◽  
The Difference

This study's purpose was to determine if a correlation exists between cochlear antioxidant activity changes and auditory function after induction of aminoglycoside (AG) ototoxicity. Two groups of five 250-350 g albino guinea pigs served as subjects. For 28 days, albino guinea pigs were administered either 200 mg/kg/day amikacin, or saline subcutaneously. Auditory brainstem response testing was performed prior to the first injection and again before sacrifice, 28 days later. Cochleae were harvested and superoxide dismutase, catalase, glutathione peroxidase, glutathione-S-transferase, glutathione reductase activities and malondialdehyde levels were measured. All antioxidant enzymes had significantly lower activity in the amikacin group (p ≤ 0.05) than in the control group. The difference in cochlear antioxidant enzyme activity between groups inversely correlated significantly with the change in ABR thresholds. The greatest correlation was for the high frequencies, which are most affected by aminoglycosides. This study demonstrates that antioxidant enzyme activity and amikacin-induced hearing loss significantly covary.

182. Early detection of hearing loss by means of brain stem auditory evoked potentials

2008 ◽  
Vol 119 (9) ◽  
pp. e144
Author(s):  
E.B. Nuñez ◽  
R.M. Pérez ◽  
M. Amador ◽  
S. Batista
Keyword(s):  
Hearing Loss ◽  
Early Detection ◽  
Evoked Potentials ◽  
Brain Stem ◽  
Auditory Evoked Potentials

Effects of Conductive Hearing Loss on Auditory Evoked Potentials and Audiogenic Seizures in Mice

1973 ◽  
Vol 244 (138) ◽  
pp. 255-256 ◽  
Author(s):  
MICHAEL D. McGINN ◽  
JAMES F. WILLOTT ◽  
KENNETH R. HENRY ◽  
K. R. H.
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Conductive Hearing Loss ◽  
Audiogenic Seizures ◽  
Conductive Hearing

Brainstem Auditory Evoked Potentials and Other Auditory Evoked Potentials

2017 ◽  
Author(s):  
Abeer J. Hani ◽  
Aatif M. Husain
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Short Latency ◽  
Brainstem Auditory Evoked Potentials ◽  
Auditory Pathways

Auditory evoked potentials (AEP) are used to evaluate the auditory pathways. Clinically the most useful AEPs are short-latency AEP, also known as brainstem auditory evoked potentials (BAEPs). As their name implies, BAEPs are used to assess the auditory pathways in the brainstem. This chapter focuses on BAEPs. The basic neuroanatomy of the generators of the BAEP waveforms is reviewed, followed by a detailed description of the techniques used to obtain BAEP and factors that may impact the results. A description of the interpretation and applications of BAEPs is provided with discussion of the significance of the changes in amplitude, absolute latencies, and interpeak latencies of the BAEP waveforms. An overview of other auditory evoked potentials is also provided.

scholarly journals Brainstem auditory evoked potentials in children with microcephaly

2016 ◽  
Vol 43 (1) ◽  
pp. 28
Author(s):  
Irawan Mangunatmadja ◽  
Dwi Putro Widodo ◽  
Hardiono D Pusponegoro
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Clinical Manifestations ◽  
Auditory Brainstem ◽  
Brainstem Auditory Evoked Potentials ◽  
Perinatal Infection ◽  
History Of ◽  
Delayed Development

Background Hearing loss (HL) is commonly found in childrenwith microcephaly. The aim of this study was to reveal hearing lossand auditory brainstem pathways disorders in children with micro-cephaly and other handicaps.Methods There were 194 children who were referred for hearingevaluation. Subjects with history of congenital perinatal infection(TORCH) were excluded. Data were collected from the results ofBrainstem Auditory Evoked Potentials (BAEP) recordings, includ-ing sex, age, clinical manifestations, latency and interlatency be-tween waves I, III, V, and the hearing levels of each ear.Results Moderate to profound HL were found in fourteen ears(58%) of patients with microcephaly. Moderate to profound HL (28%)and endocochlear damage (15%) were found in the ears of pa-tients with microcephaly and delayed speech. Moderate to pro-found HL (39%) and endocochlear damage (11%) were detectedin the ears of patients with microcephaly and delayed develop-ment. Moderate to profound HL (21%) and endocochlear damage(16%) were found in the ears of microcephalic patients with bothdelayed speech and delayed development. Moderate to profoundHL (26%) and endocochlear damage (32%) were detected in theears of patients with microcephaly and cerebral palsy.Conclusion This study revealed the importance of early HL de-tection in microcephalic patients especially those with other handi-caps such as delayed speech, delayed development, and cere-bral palsy

scholarly journals Impact of Unilateral Hearing Loss on Behavioral and Evoked Potential Measures of Auditory Function in Adults

2019 ◽  
Vol 30 (07) ◽  
pp. 564-578
Author(s):  
Oscar M. Cañete ◽  
Suzanne C. Purdy ◽  
Colin R. S. Brown ◽  
Michel Neeff ◽  
Peter R. Thorne
Keyword(s):  
Hearing Loss ◽  
Speech Recognition ◽  
Sound Localization ◽  
Auditory Evoked Potentials ◽  
Social Impact ◽  
Unilateral Hearing Loss ◽  
Control Group ◽  
Self Perception ◽  
Listening Effort ◽  
Speech Detection

AbstractA unilateral hearing loss (UHL) can have a significant functional and social impact on children and adults, affecting their quality of life. In adults, UHL is typically associated with difficulties understanding speech in noise and sound localization, and UHL increases the self-perception of auditory disability for a range of listening situations. Furthermore, despite evidence for the negative effects of reduced unilateral auditory input on the neural encoding of binaural cues, the perceptual consequences of these changes are still not well understood.Determine effects of UHL on auditory abilities and speech-evoked cortical auditory evoked potentials (CAEPs).CAEPs, sound localization, speech perception in noise and self-perception of auditory abilities (speech, spatial, and qualities hearing scale) were assessed.Thirteen adults with UHL with a range of etiologies, duration of hearing loss, and severity and a control group of eleven binaural listeners with normal hearing.Participants with UHL varied greatly in their ability to localize sound and reported speech recognition and listening effort were the greatest problem. There was a greater effect of right ear than left ear hearing loss on N1 amplitude hemispheric asymmetry and N1 latencies evoked by speech syllables in noise. As duration of hearing loss increased, contralateral dominance (N1 amplitude asymmetry) decreased. N1 amplitudes correlated with speech scores, larger N1 amplitudes were associated with better speech recognition in noise scores. N1 latencies are delayed (in the better ear) and amplitude hemisphere asymmetry differed across UHL participants as function of side of deafness, mainly for right-sided deafness.UHL affects a range of auditory abilities, including speech detection in noise, sound localization, and self-perceived hearing disability. CAEPs elicited by speech sounds are sensitive enough to evidence changes within the auditory cortex due to an UHL.

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