scholarly journals Hearing Thresholds Changes after MRI 1.5T of Head and Neck

2019 ◽  
Vol 2019 ◽  
pp. 1-4 ◽  
Author(s):  
Maryam Bahaloo ◽  
Mohammad Hossein Davari ◽  
Mohammad Sobhan ◽  
Seyyed Jalil Mirmohammadi ◽  
Mohammad Taghi Jalalian ◽  
...  
Keyword(s):  
Head And Neck ◽  
High Frequency ◽  
Repeated Measures ◽  
Hearing Threshold ◽  
Significant Shift ◽  
Auditory Thresholds ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
Significant Difference ◽  
Before And After

Introduction. Exposure to high intensity noise produced by MRI is a cause for concern. This study was conducted to determine the temporary and permanent effects of exposure to noise created by performing MRI on the hearing threshold of the subjects using conventional and extended high frequency audiometry. Methods. This semiexperimental study was performed on 35 patients referred to Shahid Rahnemoun Hospital for head and neck MRI due to different clinical conditions. The hearing threshold of patients was measured before, immediately after, and 24 hours after performing 1.5 Tesla MRI using conventional and extended high frequency audiometry. SPSS version 18 was used to compare the mean hearing thresholds before and after MRI using paired T test and repeated measures analysis. Results. Comparison of auditory thresholds in conventional and extended high frequencies before and immediately after MRI showed a significant shift at 4 KHz (P = 0.008 and P = 0.08 for right and left ears), 6 KHz (P = 0.03 and P = 0.01 for right and left ears), and 14 KHz (P =0.03 and P = 0.31 for right and left ears). However, there was no significant difference between audiometric thresholds before and 24 hours after MRI. Conclusion. Noise due to 1.5 Tesla MRI can only cause transient threshold shift.

Does gestational diabetes result in cochlear damage?

2014 ◽  
Vol 128 (11) ◽  
pp. 961-965 ◽  
Author(s):  
A Selcuk ◽  
H Terzi ◽  
U Turkay ◽  
A Kale ◽  
S Genc
Keyword(s):  
Gestational Diabetes ◽  
High Frequency ◽  
Diabetic Patients ◽  
Diabetes Group ◽  
Auditory Thresholds ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
Geographical Populations ◽  
Significant High Frequency ◽  
Cochlear Damage

AbstractBackground:Glucose metabolism has a significant impact on inner-ear physiology. Therefore, hearing may be affected in gestational diabetes.Method:A matched case–control study was performed to evaluate 27 patients with gestational diabetes and 31 non-diabetic pregnant women with similar demographic characteristics. A medical history was taken for each participant, and otological inspections and high-frequency audiometry tests were performed.Results:There were no significant differences in average pure tone air–bone hearing thresholds between the groups (p > 0.05). However, evaluation of high-frequency hearing thresholds indicated significantly increased auditory thresholds at 10 kHz and 12 kHz for right ears and at 8, 10, 12 and 14 kHz for left ears in the gestational diabetes group (p < 0.001).Conclusion:An investigation into cochlear damage in gestational diabetic patients showed significant high-frequency hearing loss. Further studies are needed to validate these findings in different ethnic groups and geographical populations.

Hearing threshold assessment post grommet insertion. Is it reliable?

2006 ◽  
Vol 121 (5) ◽  
pp. 431-434 ◽  
Author(s):  
H Griffiths ◽  
D James ◽  
R Davis ◽  
S Hartland ◽  
N Molony
Keyword(s):  
Repeated Measures ◽  
Otoacoustic Emissions ◽  
Hearing Threshold ◽  
Otoacoustic Emission ◽  
Auditory Brainstem ◽  
General Anaesthetic ◽  
Hearing Thresholds ◽  
Before And After ◽  
Brainstem Response ◽  
Operative Assessment

We aimed to investigate whether auditory brainstem response (ABR), assessed immediately after grommet insertion, was an accurate measure of hearing threshold.Ten children were recruited (20 ears). Patients underwent transient evoked otoacoustic emission (TEOAE) and ABR tests before and after grommet insertion under general anaesthetic. A third assessment was conducted at a six-week review, without anaesthetic or sedation. The hearing threshold in dB and the presence of TEOAE were recorded by senior audiologists. The results of each investigation were compared. At review, only 15 ABR and 17 TEOAE tests, of a possible 20, were recorded.Transient evoked otoacoustic emissions were recorded in 30 per cent of ears pre-operatively, 20 per cent of ears post-operatively and 82 per cent of ears at six-week review. The average ABR thresholds were 23.75 dB (range 10–45 dB) pre-operatively, 27.25 (range 15–40 dB) post-operatively and 15 dB (range 5–25 dB) at six-week review. Comparing pre- and post-operative assessment, decreased thresholds were seen in six ears and elevated thresholds in 11. Comparing the six-week review ABR with the post-operative ABR, 13 ears had decreased thresholds, by as much as 20 dB. Thresholds of 35 dB or greater were measured in six ears immediately after grommet insertion (maximum 40 dB). Threshold shifts of 15 dB or greater was observed in seven ears. The intra-subject variation was shown to be significant (p<0.001) when repeated measures analysis of variance was applied.We conclude that there is evidence that ABR can be inaccurate after grommet insertion, overestimating hearing thresholds. We believe that the mechanism by which the error is realised is temporary threshold shift.

scholarly journals A study of the high-frequency hearing thresholds of dentistry professionals

2012 ◽  
Vol 16 (02) ◽  
pp. 226-231 ◽  
Author(s):  
Ana de Melo ◽  
Cibele Santos ◽  
Andréa Lopes
Keyword(s):  
High Frequency ◽  
Hearing Threshold ◽  
Impaired Hearing ◽  
Prevention Measures ◽  
Hearing Ability ◽  
Group I ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
The Mean ◽  
Frequency Threshold

Summary Introduction: In the dentistry practice, dentists are exposed to harmful effects caused by several factors, such as the noise produced by their work instruments. In 1959, the American Dental Association recommended periodical hearing assessments and the use of ear protectors. Aquiring more information regarding dentists', dental nurses', and prosthodontists' hearing abilities is necessary to propose prevention measures and early treatment strategies. Objective: To investigate the auditory thresholds of dentists, dental nurses, and prosthodontists. Method: In this clinical and experimental study, 44 dentists (Group I; GI), 36 dental nurses (Group II; GII), and 28 prosthodontists (Group III; GIII) were included, , with a total of 108 professionals. The procedures that were performed included a specific interview, ear canal inspection, conventional and high-frequency threshold audiometry, a speech reception threshold test, and an acoustic impedance test. Results: In the 3 groups that were tested, the comparison between the mean hearing thresholds provided evidence of worsened hearing ability relative to the increase in frequency. For the tritonal mean at 500 to 2,000 Hz and 3,000 to 6,000 Hz, GIII presented the worst thresholds. For the mean of the high frequencies (9,000 and 16,000 Hz), GII presented the worst thresholds. Conclusion: The conventional hearing threshold evaluation did not demonstrate alterations in the 3 groups that were tested; however, the complementary tests such as high-frequency audiometry provided greater efficacy in the early detection of hearing problems, since this population's hearing loss impaired hearing ability at frequencies that are not tested by the conventional tests. Therefore, we emphasize the need of utilizing high-frequency threshold audiometry in the hearing assessment routine in combination with other audiological tests.

scholarly journals Extended high-frequency audiometry in healthy adults with different age groups

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Mingming Wang ◽  
Yu Ai ◽  
Yuechen Han ◽  
Zhaomin Fan ◽  
Peng Shi ◽  
...  
Keyword(s):  
High Frequency ◽  
Pure Tone ◽  
Bone Conduction ◽  
Hearing Threshold ◽  
Healthy Population ◽  
Age Group ◽  
Hearing Ability ◽  
Hearing Thresholds ◽  
High Frequency Audiometry ◽  
Air Conduction

Abstract Background It was well-documented that extended high-frequency (EHF, above 8 kHz) hearing test could be more sensitive comparing with the conventional measurement on frequency below 8 kHz, regarding the early prediction of auditory damage in certain population. However, hardly any age-specific thresholds of EHF in population with normal hearing ability were observed. This study aims to monitor the age-dependent hearing thresholds at EHF (from 9 to 20 kHz) in healthy hearing population. Methods A total of 162 healthy participants (from 21 to 70 years) with normal conventional pure tone audiograms were recruited and separated into five groups by age. Conventional pure tone average was performed with frequencies from 0.25 to 8 kHz under air conduction and from 0.25 to 4 kHz under bone conduction. EHF audiometry from 9 to 20 kHz was determined under air conduction. Results The effects of aging on hearing were evident at frequencies above 4 kHz. The hearing thresholds of EHF were less than 26 dB HL before 30 years-olds. Hearing abilities in EHF were deteriorated starting from the 31 ~ 40 group and were most obvious in the 51 ~ 60 group and the 61 ~ 70 group with the maximum thresholds of 75 dB HL. Sensitivity of EHF was inversely proportional to the frequency within each age group, and to age among groups. Subjects under 30 years old were totally responsive up to 16 kHz, and 52.2% could respond to 20 kHz. Meanwhile, no responsiveness was recorded to 20 kHz in the 51 ~ 60 group and even to 18 kHz in the 61 ~ 70 group. No gender differences in hearing threshold was observed within each age group, except an obvious decline at frequencies of 4, 6, 8, and 9 kHz in male participants of the 41 ~ 50 group. Conclusions Hearing thresholds at EHF from 9 to 20 kHz were more sensitive than at frequencies below 8 kHz for hearing measurement, and aging inversely affected hearing ability at EHF in healthy population. Hearing thresholds at EHF deteriorated with age and raising frequency, while the upper frequency limit decreased with aging. Graphical abstract

Temporary and Permanent Hearing Loss Among College-Aged Drumline Members

2016 ◽  
Vol 60 (1) ◽  
pp. 1009-1013
Author(s):  
Montana Haygood ◽  
Bruce N. Walker
Keyword(s):  
Hearing Loss ◽  
Hearing Threshold ◽  
Control Group ◽  
Significant Shift ◽  
Marching Band ◽  
Community Based ◽  
Sound Exposure ◽  
Hearing Thresholds ◽  
Before And After ◽  
And Gender

Many musicians experience dangerous levels of sound exposure throughout their musical careers. In particular, members of marching percussion ensembles (“drumlines”) are exposed to prolonged periods of potentially damaging levels of sound. As a result, they are at risk of developing hearing loss. This study determines whether any significant hearing loss or threshold shifts occurs with drumline members in an indoor drumline and college marching band. Two groups of participants were analyzed: one group consisted of both college drumline and community-based competitive drumline members, while the other (control) group consisted of non-drummers who were matched for age and gender to the drummers. The non-drummers were given an audiogram to determine the lowest levels of sound they could detect. The drummers were given an audiogram immediately before and after a drumline rehearsal. First, the drummer group showed significant hearing loss at the start of their rehearsal, compared to the non-drummer group. This is indication of permanent hearing loss for the drummers. Second, the drummers’ hearing thresholds after rehearsal were compared to their levels immediately before rehearsal. A significant shift in the drummer group’s hearing threshold was found, indicating (additional) temporary hearing loss occurring over the course of the rehearsal. Earplug usage of the drummers during their rehearsals was also analyzed. Drummers who did not wear earplugs exhibited a significantly greater threshold shift (i.e., hearing loss) than drummers who did wear earplugs. Evidence of both temporary and permanent hearing loss amongst the drummer group makes it clear that drumline members should be required to wear hearing protection during rehearsals, and presumably also during performances.

Impact of Resin Composite Viscosity and Fill-technique on Internal Gap in Class I Restorations: An OCT Evaluation

2021 ◽  
Author(s):  
KR Kantovitz ◽  
LL Cabral ◽  
NR Carlos ◽  
AZ de Freitas ◽  
DC Peruzzo ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Resin Composite ◽  
Oral Care ◽  
High Viscosity ◽  
Class I ◽  
Low Viscosity ◽  
Significant Difference ◽  
Before And After ◽  
Internal Adaptation ◽  
Internal Gap

SUMMARY The aim of this in vitro study was to quantitatively evaluate the internal gap of resin composites of high-and low-viscosity used in single- and incremental-fill techniques in Class I cavities exposed to thermal cycling (TC) using optical coherence tomography (OCT). Cavities of 4-mm depth and 3-mm diameter were prepared in 36 third molars randomly distributed into four groups, according to viscosity of restorative resin-based composite (high or low viscosity, all from 3M Oral Care) and technique application (bulk or incremental fill) used (n=9): RC, high-viscosity, incremental-fill, resin-based composite (Filtek Z350 XT Universal Restorative); BF, high-viscosity, bulk-fill, resin-based composite (Filtek One Bulk Fill); LRC, low-viscosity, incremental-fill, resin-based composite (Filtek Z350 XT Flowable Universal Restorative); and LBF, low-viscosity, bulk-fill, resin-based composite (Filtek Flowable Restorative). Single Bond Universal Adhesive system (3M Oral Care) was used in all the experimental groups. The incremental-fill technique was used for RC and LRC groups (2-mm increments), and a single-layer technique was used for BF and LBF groups, as recommended by the manufacturer. The internal adaptation of the resin at all dentin walls was evaluated before and after TC (5000 cycles between 5°C and 55°C) using OCT images. Five images of each restored tooth were obtained. Images were analyzed using ImageJ software that measured the entire length of the gaps at the dentin–restoration interface. The length of gaps (μm) was analyzed using two-way repeated measures ANOVA and the Tukey tests (α=0.05). There was a significant interaction between material types and TC (p=0.006), and a significant difference among all material types (p&lt;0.0001), before and after TC (p&lt;0.0001). Increased internal gaps at the dentin–restoration interface were noticed after TC for all groups. RC presented the lowest value of internal gap before and after TC, while LBF showed the highest values of internal gap after TC. In conclusion, TC negatively affected the integrity of internal gap, whereas high-viscosity, incremental-fill, resin-based composite presented better performance in terms of internal adaptation than low-viscosity, bulk-fill materials in Class I cavities.

Postural control and risk of falling in people who are blind: The effect and durability of perturbation and vestibular exercises

2022 ◽  
pp. 026461962110673
Author(s):  
Yousof Moghadas Tabrizi ◽  
Mohammad Hani Mansori ◽  
Mohammad Karimizadeh Ardakani
Keyword(s):  
Repeated Measures ◽  
Dynamic Balance ◽  
Somatosensory System ◽  
Exercise Group ◽  
Risk Of Falling ◽  
Balance System ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Falling Risk

The aim of this study was to compare the effect and durability of perturbation and vestibular exercises on balance and the risk of falling in people with visual impairment (VI). Thirty-six men with VI were divided into three groups, including a control and two experimental (perturbation and vestibular) groups. The experimental groups performed perturbation and vestibular exercises for 4 weeks and three sessions per week. Biodex balance system was used to assess balance and falling risk before and after training interventions. To evaluate the effects within and between groups at three levels of measurement: pre-test, post-test, and durability effect between three groups, repeated measures analysis of variance (ANOVA) and one-way ANOVA were used. Repeated measures ANOVA test showed that both experimental groups showed significant improvements in static balance, dynamic balance, and falling risk. In comparison between the groups, the results showed that in the post-test and durability stages, there was a significant difference between the groups and the perturbation exercise group had a greater effect on the dependent variables. Due to the effectiveness of exercises, it is recommended that people with VI pay attention to balance-based perturbation exercises to strengthen the somatosensory system and vestibular exercises to strengthen the vestibular system.

scholarly journals Impact of economic crisis on indications for general versus local anaesthesia in head and neck surgery: a single centre analysis

2014 ◽  
Vol 3 (6) ◽  
pp. 92
Author(s):  
Tatjana Goranovic ◽  
Boris Simunjak ◽  
Dinko Tonkovic ◽  
Miran Martinac
Keyword(s):  
Cost Saving ◽  
Head And Neck ◽  
General Anaesthesia ◽  
Local Anaesthesia ◽  
Neck Surgery ◽  
Head And Neck Surgery ◽  
Significant Difference ◽  
Before And After ◽  
Saving Measure ◽  
The Impact

Objective: To analyze the impact of the hospital board’s cost saving measure on physicians’ decision to indicate head and neck surgery according to the type of anaesthesia (general versus local). Methods: Design: a retrospective analysis of medical charts on head and neck surgery and anaesthesia covering 2011-2012. Setting: department of otorhinolaryngology and head and neck surgery, university hospital, Croatia. Participants: patients undergoing head and neck surgery. Intervention(s): reduction of departmental financial fund for general anaesthesia for 10%. Main Outcome Measure(s): an overall of number of head and neck surgeries performed in general versus local anaesthesia before and after the implementation of the intervention measure. Results: There were a total of 984 head and neck surgeries in general anaesthesia in 2011 and 861 in 2012. There were a total of 460 head and neck surgeries in local anaesthesia in 2011 and 528 in 2012. The performance of head and neck surgeries in general anaesthesia was significantly reduced in a year after the implementation of the intervention (p = .01) There was no statistical significant difference in the performance of head and neck surgeries in local anaesthesia before and after the intervention. Conclusions: The reduction of departmental fund for general anaesthesia as a cost saving method resulted only in reducing the total performance of surgeries in general anaesthesia without any switch to performing surgeries in local anaesthesia. It seems that the hospital board’s cost saving measure did not have any impact on physicians’ decisions to indicate more surgeries in local anaesthesia. 

scholarly journals Can Pregnancy Lead to Changes in Hearing Threshold?

2019 ◽  
pp. 014556131987124
Author(s):  
Devanshu Kwatra ◽  
Sunil Kumar ◽  
Gautam Bir Singh ◽  
Ratna Biswas ◽  
Prabhakar Upadhyay
Keyword(s):  
Postpartum Period ◽  
Hearing Threshold ◽  
Pure Tone Audiometry ◽  
Threshold Values ◽  
Hearing Sensitivity ◽  
Pregnant Females ◽  
Hearing Thresholds ◽  
Significant Difference ◽  
Hearing Assessment ◽  
Air Conduction

Purpose: This study explores the changes in hearing thresholds in pregnancy. Materials and Methods: A prospective hospital-based observational study was performed with a total of 69 patients in the age-group of 18 to 40 years. Patients underwent hearing assessment twice during the study period. Conventional pure tone audiometry and impedance audiometry were performed, first during the antepartum period (28-32 weeks of gestational age) and second time during the postpartum period (6 weeks postpartum). Results: Significant difference was seen between the average of air conduction threshold values at speech frequencies when antepartum values were compared with postpartum values. Conclusion: The alterations in hearing sensitivity in pregnant females which improved during the postpartum period can be attributed to pregnancy.

scholarly journals Extended High Frequency Audiometry in Polycystic Ovary Syndrome

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Cuneyt Kucur ◽  
Suna Kabil Kucur ◽  
Ilay Gozukara ◽  
Ali Seven ◽  
Kadriye Beril Yuksel ◽  
...  
Keyword(s):  
Hearing Impairment ◽  
High Frequency ◽  
Polycystic Ovary ◽  
Endothelial Damage ◽  
Reproductive Age ◽  
Control Group ◽  
Fasting Insulin ◽  
High Frequencies ◽  
High Frequency Audiometry ◽  
Significant Difference

Objective. Polycystic ovarian syndrome (PCOS) is the most common endocrine disorder affecting 5–10% of women in reproductive age. Insulin resistance, dyslipidemia, glucose intolerance, hypertension, and obesity are metabolic disorders accompanying the syndrome. PCOS is a chronic proinflammatory state and the disease is associated with endothelial dysfunction. In diseases with endothelial damage, hearing in high frequencies are mostly effected in early stages. We evaluated extended high frequency hearing loss in PCOS patients.Material Methods. Forty women diagnosed as PCOS and 25 healthy controls were included in this study. Age and BMI of PCOS and control groups were comparable. Each subject was tested with low (250–2000 Hz), high (4000–8000 Hz), and extended high frequency audiometry (8000–20000). Hormonal and biochemical values including LH, LH/FSH, testosterone, fasting glucose, fasting insulin, HOMA-I, and CRP were calculated.Results. PCOS patients showed high levels of LH, LH/FSH, testosterone, fasting insulin, glucose, HOMA-I, and CRP levels. The hearing thresholds of the groups were similar at frequencies of 250, 500, 1000, 2000, and 4000 Hz; statistically significant difference was observed in 8000–14000 Hz in PCOS group compared to control group.Conclusion. PCOS patients have hearing impairment especially in extended high frequencies. Further studies are needed to help elucidate the mechanism behind hearing impairment in association with PCOS.

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