Journal articles: 'Impedance audiometry'

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Levine, A. Paul, Moises A. Arriaga, and William M. Luxford. "Impedance Audiometry and Iatrogenic Hearing Loss." Otolaryngology–Head and Neck Surgery 108, no. 1 (1993): 70–72. http://dx.doi.org/10.1177/019459989310800109.

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Peterson, M. Kathleen. "IMPEDANCE AUDIOMETRY AND THE BRAIN-DAMAGED CHILD." Developmental Medicine & Child Neurology 20, no. 6 (2008): 800–802. http://dx.doi.org/10.1111/j.1469-8749.1978.tb15314.x.

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Kitsera, Ol Ol. "Karhart’s notch in ear diseases." OTORHINOLARYNGOLOGY №5-6(3) 2020, no. 5-6(3) 2020 (November 4, 2020): 58–63. http://dx.doi.org/10.37219/2528-8253-2020-6-58.

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According to the literature and our research, Karhart’s notch, as a local increase in bone conduction thresholds at frequencies of 500-3000 Hz, is observed not only in otosclerosis, but also in other diseases of the middle ear, especially – with adhesive and secretory otitis. Therefore, it is not appropriate to use the presence of a Karhart’s notch as a pathognomonic sign of otosclerosis. Audiometric diagnostics of non-purulent ear diseases should definitely be supplemented with impedance audiometry.

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Sanu, Sanoop, Shilpa Divakaran, Sabarinath Vijayakumar, Sunil Saxena, Arun Alexander, and Suryanarayanan Gopalakrishnan. "Dynamic Slow Motion Video Endoscopy as an Adjunct to Impedance Audiometry in the Assessment of Eustachian Tube Function." International Archives of Otorhinolaryngology 22, no. 02 (2017): 141–45. http://dx.doi.org/10.1055/s-0037-1603920.

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Introduction Eustachian tube (ET) dysfunction plays an important role not only in the pathophysiology of various middle ear disorders, but also in predicting the outcome of the treatment. As there is no single test that assesses both the anatomic and physiological functions of the ET, a combination of tympanometry and dynamic slow motion video endoscopy may improve the sensitivity of ET function assessment. Objective To find out if there is any correlation between dynamic slow motion nasal video endoscopy and impedance audiometry in assessing ET function in patients with middle ear diseases. Methods Ours was a descriptive study performed with 106 patients attending the Ear, Nose and Throat (ENT) Outpatient Department of a tertiary care center in South India with features suggestive of middle ear disease. All patients underwent impedance audiometry and dynamic slow motion nasal video endoscopy, and were graded based on the severity of the ET pathology. Results A total of 47 out of 97 patients with abnormal endoscopy findings also had abnormal impedance audiometry. The correlation was greater among the patients with higher grades of ET dysfunction. The endoscopy findings of 106 cases, when correlated with middle ear manometry, revealed that 56 cases showed complete agreement, and 50 cases showed disagreement. The nasal endoscopy results, when correlated with middle ear manometry studies by using McNemar's chi-squared (χ2) test, showed a significant association between the 2 tests (p = 0.017). Conclusion There is a significant alteration in middle ear pressure as the severity of the ET tube dysfunction increases. Impedance audiometry and nasal endoscopy provide a better measure of ET function.

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Diacova, Svetlana. "Post-surgical noninvasive monitoring of middle ear in otitis media prolonged forms." Moldovan Medical Journal 63(3) (September 1, 2020): 11–15. https://doi.org/10.5281/zenodo.3958429.

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Background: Prolonged forms of otitis media (OM) lead to chronic hearing loss and disability from childhood. Wide spectrum of therapeutic approaches is used in management of OM in children. Objective evaluation of the middle ear after different curative modalities will help in analysis of treatment feasibility. The objective of this article was to compare the results of middle ear noninvasive monitoring after different surgical procedures in order to select the most effective one in prolonged otitis media forms.  Material and methods: Patients represent 150 children with prolonged OM. Analyzed treatment modalities: I – myringotomy, II – classical tympanostomy, III – modified tympanostomy. Middle ear monitoring included otoscopy and audiometry what was repeated 4 times during 2 years, otomicroscopy in 1 and 2 years and impedance audiometry in 2 years after surgery. The quality of life and general health scores were analyzed before surgery and in 1 and 2 years after surgery. Results: Otoscopic and audiometric data showed stable improvement in 32% of children after myringotomy, 90% of children after classical tympanostomy and 97% of children after modified tympanostomy. Impedance audiometry in 2 years after surgery demonstrated complete restoration of middle ear function in 32% of children after myringotomy, in 78% of children after classical tympanostomy, and in 94% of children after modified tympanostomy.  Conclusions: Post-surgical noninvasive monitoring demonstrated advantages of tympanostomy and especially in modified version: improvement and stability of middle ear function and low rate of otitis media persistence or recurrence.

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Rahman, Mushfiqur, Kazi Atikuzzaman, Kabir Ahmed, Md Sazzadul Hoque, and Syed Nafi Mahdee. "Changes of Impedance Audiometry before and after Adenoidectomy in a Clinically Normal Ear." Bangladesh Journal of Otorhinolaryngology 28, no. 1 (2022): 62–67. http://dx.doi.org/10.3329/bjo.v28i1.60826.

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Background: The nasopharyngeal tonsil, universally known as adenoids is to be found at the crossroads of roof along with posterior wall of nasopharynx. Adenoid is gift next to birth. Adenoid mass may block the eustachian tube, retracted tympanic membrane leads to conductive hearing loss. Impedance audiometry helps to assess the condition. Objective: To observe the changes of impedance audiometry before and after adenoidectomy in a clinically normal ear. Methods: This longitudinal study was done in Cumilla Medical College & Hospital, Cumilla during a period of one year. 50 Cases of enlarged adenoids of 3-12 years admitted in ENT ward were included in this study. All cases underwent adenotonsillectomy. Impedance Audiometry was done before and one month after adenotonsillectomy. Collected data were classified, edited, coded and statistical analysis was done. Results: Total 50 cases, mean age was 6.95(±1.77) years. Majority 33(66%) were male and 17(34%) were female. Middle ear pressure of both ears was increased after adenotonsillectomy. After operation 40(80%) was type A curve and 09(18%) was type B in right ear and 42(84%) was type A curve and 08(16%) was B curve in left ear. Conclusion: Majority tympanometry was type B in both ears before adenotonsillectomy and after operation majority tympanometry curvature was type A in both ears Bangladesh J Otorhinolaryngol 2022; 28(1): 62-67

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Rama Sridhar, M. "A clinical study to determine the effects of adenoidectomy in cases of secretory otitis media in school going children." International Journal of Otorhinolaryngology and Head and Neck Surgery 4, no. 6 (2018): 1427. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20184180.

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Background: Secretory otitis media (SOM) is common otological symptom in children. If left untreated it leads to hearing and speech impairment. Surgical management is effective in serious cases. The present study was done with the objective to assess the effect of adenoidectomy by pure tone and impedance audiometry in cases of SOM with hypertrophied adenoids.Methods: This study comprised 50 cases, who were aged 5-12 years and diagnosed as SOM with adenoid hypertrophy. It was carried out for a period one and half years from December 2015 to July 2017 at Mamata Medical College and Research Hospital, Khammam, Telangana. After detailed history and clinical examination, investigations such as pure tone audiogram, impedance audiometry, X-ray nasopharynx and diagnostic nasal endoscopy were carried out to confirm the diagnosis. All patients were posted for adenoidectomy and when indication was present tonsillectomy was also done. They were followed up at 1st, 3rd and 6th month for pure tone audiometry and impedance was done at 6th month of surgery.Results: In this study, maximum number (60%) of cases belonged to 5-7 years age group, with slight male preponderance (56%). On pure tone audiometry 68% had 16-25 dB and 32% had 26-40 dB hearing loss and average being 24.95 dB. On impedance only 14% had peak preoperatively. Postoperatively, no peak/peak conversion was seen in 33% of cases and mean A-B gap improvement at 1st, 3rd and 6th month was 13 dB, 13.2 dB and 12.7 dB respectively (p value is 0.0001,&lt;5%) when compared to preoperative findings.Conclusion: Adenoidectomy is effective in the management of middle ear infection in children having hypertrophied adenoids.

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Sharma, Shilpam, Abhinav Srivastava, and Chander Mohan Sharma. "Middle Ear Dysfunction: Connection to Allergic Rhinitis." An International Journal Clinical Rhinology 9, no. 2 (2016): 65–67. http://dx.doi.org/10.5005/jp-journals-10013-1270.

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ABSTRACT Introduction The correlation between middle ear pathology due to Eustachian tube dysfunction and nasal allergy has been a topic of debate since long. Studies of the pathogenesis of otitis media have identified interactions among infection, allergic reactions and Eustachian tube dysfunction. AIMS- The aim of this study was to evaluate the relationship between Eustachian tube dysfunction and nasal allergy and to evaluate the efficacy of oral steroids and intranasal steroidal spray on Eustachian tube dysfunction. Materials and methods The patients were diagnosed according to the diagnostic criteria of allergic rhinitis. A total of 50 patients having moderate/severe symptoms who had not taken any treatment for allergic rhinitis in the past 6 weeks with deranged middle ear function were included in the study. Group I patients were given Prednisolone, 30 mg once daily for 10 days in tapering dose along with intranasal steroid spray for 6 weeks. Group II patients were given only intranasal steroid spray for 6 weeks. Impedance audiometry was repeated at the end of 6 weeks and results were statistically analyzed. Result This study demonstrated the outcome of systemic steroids and intranasal steroidal spray in the treatment of middle ear dysfunction. In our study impedance audiometry was done at the start of study and showed type B tympanogram in 36% ears in group I and 21% in group II and type C tympanogram in 60% in group I and 50% in group II. Impedance audiometry was repeated at 10 days of treatment and showed reversal to type A curve in 26% of ears in group I and 14% of ears in group II. Impedance audiometry at the end of treatment demonstrated reversal to type A tympanogram in 64% of ears in group I and 48 % of ears in group II. How to cite this article Sharma S, Srivastava A, Sharma CM. Middle Ear Dysfunction: Connection to Allergic Rhinitis. Clin Rhinol An Int J 2016;9(2):65-67.

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Ohno, Fumio, Haruhiro Suzuki, and Kenshi Katsuda. "Preoperative determination of attic block. Examined by impedance audiometry." Practica Oto-Rhino-Laryngologica 83, no. 10 (1990): 1503–9. http://dx.doi.org/10.5631/jibirin.83.1503.

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Pelmear, P. L., D. Leong, L. Wong, J. Roos, and M. Pike. "Hand-Arm Vibration Syndrome and Hearing Loss in Hard Rock Miners." Journal of Low Frequency Noise, Vibration and Active Control 6, no. 2 (1987): 49–66. http://dx.doi.org/10.1177/026309238700600201.

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The audiometric data of hard-rock miners exposed to hand-arm vibration from jack-leg hammers obtained in surveys two years apart has been analyzed. Both air condition and impedance audiometry was used. The workers were also examined to determine the presence and severity of vibration white finger. (VWF). The hearing levels for both ears were combined, and by multiple regression analysis it is shown that there is a significant association between hearing level (at 4kHz) and stage of VWF; hearing loss and age; and hearing loss and vibration exposure years. The hearing loss was significantly greater in miners with VWF who had less than 11 years vibration exposure.

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Van Deelen, G. W., J. Hulk, and E. H. Huizing. "The use of the underpressure chamber in the treatment of patients with Menière's disease." Journal of Laryngology & Otology 101, no. 3 (1987): 229–35. http://dx.doi.org/10.1017/s0022215100101586.

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AbstractThirty-four Menière patients (43 ears) were treated in an underpressure chamber. Békésy audiometry and impedance audiometry were performed immediately before and after the exposure to underpressure. A hearing gain of more than 10 dB. was found in 19 per cent of the ears (8/43). In five ears this improvement lasted for a few days. Only one patient (2 per cent) reported a relief of tinnitus. In 9 out of the 30 patients (30 per cent) with recent vertiginous attacks a positive subjective effect on the vertigo was obtained.

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Santosh, Dr B. Krishna, Dr K. Krishna Sumanth, Dr Panda Veeranjaneyulu, Dr B. Deepthi, and Dr K. Mamatha. "A clinical study to determine the effects of adenoidectomy in cases of secretory otitis media in school going children." Tropical Journal of Ophthalmology and Otolaryngology 5, no. 8 (2020): 200–206. http://dx.doi.org/10.17511/jooo.2020.i08.01.

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Introduction: Secretory Otitis media (SOM) is the leading cause of hearing loss in children. Despitenumerous studies on the prevention and treatment of SOM during the past decades, itsmanagement remains challenging and controversial. A study was conducted to find the effect ofadenoidectomy in cases of SOM with hypertrophied adenoids and to determine the effect ofadenoidectomy on hearing as assessed by the pure tone and impedance audiometry. Material andMethods: Children aged 5 – 12 years, diagnosed as SOM with adenoid hypertrophy were included.The study was conducted from April 2019 to May 2020, in the department of ENT, GSL MedicalCollege. A detailed history and clinical examination were done. Investigations such as pure toneaudiogram, impedance audiometry, X-ray nasopharynx, and diagnostic nasal endoscopy were carriedout to confirm the diagnosis. Results: Out of the 50 participants, a maximum (60%) belonged tothe 5 – 7 years age group, the male-female ratio was 1.2. Hard of hearing was a common symptomin 66%, tonsillitis, and sinusitis in 36% and 18% respectively. On pure tone audiometry, the averagehearing loss was 24.95dB. Conclusion: Adenoidectomy in children having hypertrophied adenoidswith SOM, not only relieves Eustachian tube obstruction but also removes the source of infection.This leads to clearance of middle ear effusion and improvement in hearing postoperatively.

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Olthoff, Arno, Rainer Laskawi, and Eberhard Kruse. "Successful Treatment of Autophonia with Botulinum Toxin: Case Report." Annals of Otology, Rhinology & Laryngology 116, no. 8 (2007): 594–98. http://dx.doi.org/10.1177/000348940711600807.

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Objectives: We sought to treat autophonia due to a patulous eustachian tube using botulinum toxin. Methods: Because we assumed that the patulous eustachian tube was caused by abnormal activity of paratubal muscles (tensor and levator veli palatini muscles and salpingopharyngeus muscle), paralysis was performed via injection of botulinum toxin type A in a 45-year-old female professional musician who had had chronic unilateral autophonia for 20 years. In addition to a patient interview, an endoscopic examination of the nasopharynx (posterior rhinoscopy), ear microscopy, and impedance audiometry were performed to verify the diagnosis and the outcome after treatment. Results: The autophonia disappeared 1 week after treatment. Normalized tympanic ventilation was verified by impedance audiometry after 8 weeks. The period of symptom relief was 9 months. Conclusions: The administration of botulinum toxin type A provides a new option in the treatment of patulous eustachian tube. The reliability of this method and the effect of repeated injections remains to be proved in future studies.

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Nowak, Małgorzata, Beata Wolnowska, and Alicja Sekula. "Monitoring of conductive hearing loss due to because of eustachian tube dysfunction preservative treated with the Otovent pneumotherapy method." Journal of Medical Science 87, no. 3 (2018): 133–37. http://dx.doi.org/10.20883/jms.2018.302.

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INTRODUCTION. A conductive hearing loss is a very common problem in childhood. It is possible to indicate many reasons for the problem, but most of the times it is caused by the infectious process, as well as the typical adenoid hypertrophy in children. Very often this disease is associated with obstruction of the eustachian tube.OBJECTIVE. In this study, the authors present the results of the hearing tests of patients who underwent the treatment of the eustachian tube obstruction by pneumotherapy with otovent. The aim of the work was to monitor the effectiveness of this method of OME treatment.RESEARCH GROUP AND METHODOLOGY. The research group consisted of 54 children aged 4 to 15 years, including 23 girls and 31 boys. The control group consisted of 16 children. Pure tone audiometry and impedance audiometry were performed before and after the therapy, for all of the participants.RESULTS. Obtained results of the study showed improvement in hearing in children correctly using the Otovent set. Hearing improvement was recorded both in the results of pure tone audiometry and impedance audiometry.CONCLUSIONS. The obtained results showed the effectiveness of the pneumotherapy method. In the case of the research group, 81.4% of children achieved the auditory norm (44 people). In the case of the control group, after a fixed period of application of the Otovent set, this value was 0%. The intergroup comparative analysis clearly shows that the research group obtained significantly better results within all of the parameters assessed, than the control group.

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Niyatharuni, R., Ashwin Ashok Jaiswal, Prachi Mene, Neeta Sharma, and Girish Umredkar. "Otoscopic, radiological and audiological status of the contralateral ear in patients with unilateral chronic suppurative otitis Media." IP Journal of Otorhinolaryngology and Allied Science 6, no. 3 (2023): 67–72. http://dx.doi.org/10.18231/j.ijoas.2023.016.

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As the disease process does not affect both the ears simultaneously in all the cases, it is possible to identify in early stages of the disease process and arrest further progression by timely intervention. Hence, we aim to study the anatomical and functional changes in contralateral ear (CLE) in pts with unilateral CSOM. prospective observational study, of 75 patients attending the OPD of JLN hospital and research center, Bhilai, with unilateral CSOM, with intact TM in CLE were evaluated by otoscope, PTA, Impedance audiometry and CT temporal bone. Above observations were recorded and analyzed. 44% in our study showed abnormal TM, most common was TM retraction, seen in 22.66%. PTA showed mixed hearing loss in 5.33% and normal hearing in 66.66%. Impedance audiometry had A type graph in 82.66%, As type in 10.66%. Compliance was normal in 82.66% and decreased in 10.66%. Pressure was normal in 97.33% and was decreased in 2.66%. Normal, well pneumatized air cells in HRCT temporal bone seen in 90.66% and opacified in 12%.A detailed otoscopic evaluation of the contralateral ear plays a vital role in early diagnosis of the pathology affecting the contralateral ear. Audiological evaluation of the contralateral ear by audiometry and tympanometry provides a pathway for detecting the functional abnormalities in the contralateral ear at an early stage. Knowing the radiological status of the contralateral ear can guide us to monitor the disease progression and plan accordingly.

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Holtby, I., and D. P. Forster. "Evaluation of pure tone audiometry and impedance screening in infant schoolchildren." Journal of Epidemiology & Community Health 46, no. 1 (1992): 21–25. http://dx.doi.org/10.1136/jech.46.1.21.

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Qiu, William W., Shengguang S. Yin, Fred J. Stucker, and Mardjohan Hardjasudarma. "Audiological findings in glomus tumours." Journal of Laryngology & Otology 111, no. 3 (1997): 218–22. http://dx.doi.org/10.1017/s0022215100136953.

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AbstractGlomus tumours involving the middle ear and the cerebellopontine angle are reported with emphasis on audiological findings. Magnetic resonance imaging (MRI), angiographic and pathological results are presented. Audiological tests, including impedance audiometry, evoked otoacoustic emissions and auditory brainstem responses, are valuable in evaluation of the effect of glomus tumours on the auditory system as well as their pathological extent.

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Mehta, Pritam, Imran Ansari, Preeti Sahu, and Debadatta Mahallik. "An audiological profiling in metachromatic leukodystrophy: a case study." International Journal of Otorhinolaryngology and Head and Neck Surgery 8, no. 10 (2022): 861. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20222451.

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Metachromatic leukodystrophy (MLD) is a lysosomal storage disease, which is characterized by damage of the myelin sheath that covers most of nerve fibers of the central and peripheral nervous systems. The disease occurs due to a deficiency of the lysosomal enzyme arylsulfatase A (ARSA) or its sphingolipid activator protein saposin B (SapB). Audiological test batteries were carried out, i.e.; behavioural observation audiometry (BOA), impedance audiometry, otoacoustic emission (OAE) and brainstem evoked response audiometry (BERA). Result showed there was no changes in behaviour towards the stimulus, has been noticed in BOA, bilateral A type tympanogram with absence of acoustic reflexes in all frequencies on Ipsi and contra-lateral stimulations and no wave Vth was found at 90 dBnHL in both ears even at repeated trials in BERA. Early identification of hearing loss offers children the opportunity to develop significantly improved language skills. Otologist and audiologist need to be taken care and to provide medical treatment as well as amplification device to the patients.

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Shidlovskaya, Tetiana A., Tamara V. Shidlovskaya, Kateryna Yu Kureneva, Nikolay S. Kozak, and Tetiana V. Shevtsova. "Peculiarities of the acoustic reflex registration thresholds in relation to the parameters of the thresholds tone audiometry in patients with acute combat trauma." OTORHINOLARYNGOLOGY, No6(5) 2022 (January 30, 2023): 39–43. http://dx.doi.org/10.37219/2528-8253-2022-6-39.

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Aim: study of threshold ratios between indicators of acoustic impedance and threshold tonal audiometry in military personnel – participants in hostilities. Materials and methods: the results of audiometric and impedancemetric examinations of 43 servicemen aged 18 to 42 years who received combat acute trauma in the period March-August 2022 and 20 patients with severe sensorineural deafness (2, 3, 4 stages according international classification) of non-acutraumatic genesis as a comparison group. Results and their discussion: During the examination of 43 soldiers, it was found that with significant sensorineural hearing loss on both sides (3 and 4 stages according international classification), the patients registered a full-fledged acoustic reflex during ipsilateral and contralateral stimulation. When conducting an impedanceometric examination of patients in the comparison group, it was found that in most patients the acoustic reflex was not registered at all. Conclusions: 1. In combat acute acoustic trauma, it is possible to register acoustic middle-ear-muscle reflex with severe hearing loss, which may be caused by damage to the receptor part of the auditory analyzer and the accompanying symptom of the phenomenon of accelerated loudness, by a central mechanism, or by a combination of central and peripheral mechanisms. 2. Dissociation of acoustic middle-ear-muscle reflex threshold values and threshold tonal audiometry is a characteristic feature of acutraumatic damage to the auditory analyzer. 3. Identified features, such as registration of acoustic middle-ear-muscle reflex in severe hearing loss, dissociation of acoustic reflex thresholds and tonal audiometry may be useful for further study of the pathogenesis of combat acute trauma, which, in turn, will contribute to improving the quality of diagnosis and finding ways to correct disorders of the auditory system in individuals, who suffered as a result of hostilities.

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Cardoso, Mariana de Medeiros, Rudimar dos Santos Riesgo, and Pricila Sleifer. "Auditory Brainstem Response Findings in Children with Level 1 Autism Spectrum Disorder: A Comparative Study." International Archives of Otorhinolaryngology 29, no. 02 (2025): 001–7. https://doi.org/10.1055/s-0044-1792084.

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Abstract Introduction Autism spectrum disorder is a pervasive developmental disorder characterized by deficits in communication and social interactions, as well as repetitive behavioral patterns. Understanding the relationship between auditory brainstem response and hearing is crucial, considering the importance of sensory function. Auditory brainstem response testing is a tool that evaluates the auditory system from periphery to brainstem in response to an acoustic stimulus, providing important information about the auditory pathways. Objective To compare auditory brainstem response findings in children with autism spectrum disorder versus those of a control group. Methods Cross-sectional, comparative study of 23 children (age 7–10 years) diagnosed with autism spectrum disorder and an age- and sex-matched control group of normal-hearing children with typical development. All participants underwent otoscopy, impedance audiometry, pure-tone audiometry, speech audiometry, and brainstem evoked response audiometry. Results Statistically significant between-group differences were seen on comparison of the absolute latencies of waves III (p = 0.047) and V (p = 0.034), as well as interpeak intervals III to V (p = 0.048) and I to V (p = 0.036), with increased values in the study group. The sample was composed of 8.7% females and 91.3% males. Conclusion In this sample, children with autism spectrum disorder showed increased auditory brainstem response latencies compared to the control group, suggesting auditory pathway impairment.

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Painton, Stephen W., and Michael B. Shaw. "Aural Pain Resulting from Acoustic Reflex." Annals of Otology, Rhinology & Laryngology 97, no. 2 (1988): 131–32. http://dx.doi.org/10.1177/000348948809700207.

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We present an unusual case of physical discomfort, as opposed to objective or subjective tinnitus, caused by a unilateral acoustic reflex. The cause of the discomfort was identified audiologically by the use of acoustic impedance audiometry. The dull pain that was elicited upon contraction and relaxation of the stapedius muscle was eliminated with sectioning of the stapedial tendon. No explanation of the mechanism for the pain is suggested at present.

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Tonini, Ross, Charles Ballay, and Spiros Manolidis. "Auditory Steady-State Response Audiometry in Profound SNHL: The Impact of Abnormal Middle Ear Function." Ear, Nose & Throat Journal 84, no. 5 (2005): 282–88. http://dx.doi.org/10.1177/014556130508400511.

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Auditory steady-state response (ASSR) audiometry is a commercially available tool that is used to predict behavioral auditory threshold levels. Its particular value stems from the technology's ability to measure frequency-specific responses in the background electroencephalogram to auditory stimuli presented across a broad range of frequencies and sound pressure levels. It is clearly of benefit when used to assess threshold levels in infants and children with severe-to-profound hearing impairment (i. e., cochlear implant candidates). Although numerous authors have provided evidence of the usefulness of ASSR testing, their reports have concerned patients whose middle ear impedance measures were normal. We report the cases of 2 patients who, following improvement of abnormal middle ear impedance values, experienced a marked improvement in measurable thresholds by ASSR testing.

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Tsunoda, Koichi, Shizue Takahashi, Minako Takanosawa, and Yoshitaka Shimoji. "The influence of pregnancy on sensation of ear problems – ear problems associated with healthy pregnancy." Journal of Laryngology & Otology 113, no. 4 (1999): 318–20. http://dx.doi.org/10.1017/s0022215100143877.

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AbstractWe wondered how many women had experienced a sensation of fullness in the ear during pregnancy. To address this question, data were obtained from a group of healthy women who attended the gynaecology clinic in our hospital as pregnancy cases between February 1995 and January 1998 and who volunteered to participate in our study. A control group was drawn from healthy female co-medical staff members of our hospital who had never been pregnant. The data used for comparing the two groups were taken from a questionnaire about ear problems that was presented to all subjects. The results suggest that ear problems may be increased in pregnancy, particularly for hypotensive pregnant women. However, even for pregnant women complaining of ear problems, pure-tone audiometry and impedance audiometry showed normal hearing in all cases. Furthermore, these women's complaints resolved completely on delivery of their babies.

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Subramaniam, Vijayalakshmi, Manuprasad S, Hebin H. Kallikkadan, and Vijay Kumar K. "Otological and audiological manifestations in cleft lip and cleft palate children: a clinical study." International Journal of Otorhinolaryngology and Head and Neck Surgery 1, no. 1 (2015): 7. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20150579.

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Background: Cleft lip and cleft palate are the commonest congenital anomalies of the orofacial region. The incidence of middle ear problems and hearing loss is reported to be higher in children with cleft palate &amp;/or cleft lip.Methods: A prospective, observational case-control study comprising 80 subjects (40 cases and 40 controls) was undertaken at Yenepoya Medical College Hospital, Mangalore, Karnataka, India. All subjects enrolled were subjected to detailed ENT examination including otoscopy, pure tone audiometry and impedance audiometry. Results: Retracted tympanic membrane suggestive of Otitis Media with Effusion (OME) and conductive hearing loss was observed in more than 50% of patients with cleft palate &amp;/or cleft lip. Tympanogram of B type suggesting OME was observed in 27% of cases. Chronic otitis media was observed in 32.5% of cases.Conclusions: The prevalence of OME, Chronic otitis media and hearing loss was observed to be higher among children with cleft palate &amp;/or cleft lip. Otological and audiometric assessment should be performed for all patients having cleft palate &amp;/or cleft lip atleast before surgery in order to facilitate early identification and intervention for middle ear problems particularly middle ear effusion.

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Istrate, Marina, Mihai Hasbei-Popa, Daniela Adriana Iliescu, Ana Cristina Ghiță, Brigitha Vlaicu, and Mihai Aurelian Ghiță. "Dual Sensory Impairment: The Correlation between Age Related Macular Degeneration and Sensorineural Hearing Loss." Medicina 58, no. 2 (2022): 291. http://dx.doi.org/10.3390/medicina58020291.

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The pathogeneses of age-related macular degeneration (AMD) and age-related hearing impairment are not yet fully understood. If AMD and age-related hearing impairment are correlated, the cause of both may be a result of a common vulnerability. The aim of this study was to assess the interrelation between age-related macular degeneration and age-related hearing loss. Material and methods: In our case-control analysis, the hearing conditions of 40 subjects with AMD were compared with 40 age-matched healthy controls. In all patients, retinal changes were certified by clinical examinations, optical coherence tomography (OCT), and fluorescein angiography (FA). All subjects were inspected with pure tone audiometry (PTA), impedance audiometry, and speech audiometry. Results: A significant correlation (p < 0.001) was identified between age-related macular degeneration and age-related hearing impairment. The predominant hearing impairment in this case was sensorineural (SNHL). Of the patients diagnosed with AMD, SNHL was found in 88.89% of those with exudative macular degeneration and in 67.74% of those with atrophic macular degeneration. In contrast, we found that a significant proportion of the control group had normal hearing. Conclusion: One possible explanation for the association between retinal and cochlear impairment may be due to a melanin disorder.

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Rahman, Tawfiqur, Masroor Rahman, Mohammad Anwar Hossain, and Arif Mahmud Jewel. "Comparison of Eustachian tube function by impedance audiometry and correlation results with tympanoplasty." International Journal of Otolaryngology Research 6, no. 2 (2024): 10–13. http://dx.doi.org/10.33545/26646455.2024.v6.i2a.41.

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Miśkiewicz-Orczyk, Katarzyna, Wojciech Pluskiewicz, Beata Kos-Kudła, and Maciej Misiołek. "Assessment of Osteoporosis and Vitamin D3 Deficiency in Patients with Idiopathic Benign Paroxysmal Positional Vertigo (BPPV)." Medicina 59, no. 5 (2023): 862. http://dx.doi.org/10.3390/medicina59050862.

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Background and objectives: Osteoporosis and vitamin D3 deficiency may be risk factors of benign paroxysmal positional vertigo (BPPV). The aim of this study was to assess the prevalence of osteoporosis and 25(OH) vitamin D3 deficiency in a group of patients with idiopathic benign paroxysmal positional vertigo. Materials and Methods: Thirty-five patients (twenty-eight women and seven men) with posterior semicircular canal BPPV were enrolled in the study. The subjects underwent hearing assessment (tonal audiometry and impedance audiometry) and the Dix-Hallpike maneuver. Serum 25(OH) vitamin D3 levels were determined and lumbar spine bone densitometry was performed. The relationships between sex, age, height, Body Mass Index (BMI), vitamin D3 levels and bone densitometry results were assessed. Results: The diagnosis of osteoporosis was confirmed in 1 patient (3%), 3 subjects were osteopenic (8.6%), and normal bone densitometry was found in 31 (88.6%) patients. Conclusions: We found no statistically significant relationships between age, BMI or vitamin D3 levels and bone densitometry results in patients with idiopathic BPPV.

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Mujahid, Mohammed Naseeruddin, and Syeda Ayesha. "Analysis of Tympanometric Attributes in Middle Ear Diseases and in Postoperative Middle Ear Surgeries - A Prospective Study at a Tertiary Hospital in Hyderabad, Telangana." Journal of Evolution of Medical and Dental Sciences 10, no. 45 (2021): 3827–31. http://dx.doi.org/10.14260/jemds/2021/774.

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BACKGROUND Tympanometry as a definitive test protocol in the diagnosis of middle-ear disease and function remains still a tentative one. Primarily this is the result of cost effectiveness and concerns over referral to an audiology unit. It was also found to be due to the concerns over variability in test protocols and its influence on demographic and environmental factors. The present study was done to simplify the understanding of the different test variables of tympanometry. METHODS The clinical study was conducted in the Department of ENT, Deccan College of Medical Sciences and Princess Esra Hospital, Hyderabad. Out of 134 patients registered with loss of hearing, 68 patients were grouped as preoperative group (136 ears) and 66 patients as postoperative group (132 ears). The patients in both groups were registered at different times and they were not the same. Audiology equipment used was impedance audiometers (Siemens SD 30, interacoustics AT 235 H); portable tympanometer (Welch-Allyn). Preliminary pure tone audiometry was also done to supplement the diagnosis. The test results were reported as: conductive, sensorineural, and mixed hearing loss. The results were reported based on the variables/criteria: admittance, tympanometric peak pressure (TPP), peak amplitude (Ya peak) and the volume of the ear canal. RESULTS There were 39 males (57.35 %) and 29 females (42.64 %) in the preoperative group. There were 41 males (62.12 %) and 25 females (37.87 %) in the postoperative group. Middle ear diseases showing conductive deafness were grouped as four types: a) middle ear effusion (35 patients); b) Eustachian tube dysfunction (31 patients); c) Ossicular chain adhesions (38 patients) d) tympanic membrane perforations and tympanosclerosis (28 patients) and e) otosclerosis (02 patients). CONCLUSIONS Using tympanometric attributes such as admittance, tympanometric peak pressure, peak amplitude (Ya peak) and the volume of the ear canal, it was possible to make accurate diagnosis of middle ear diseases and their exact pathology or make a differential diagnosis. The attributes used gave much accurate measure of the mechano-acoustics than the preset values used regularly by many centres. KEY WORDS Impedance Audiometry (Tympanometry), Middle Ear Diseases, Compliance, Peak Pressure and Tympanometric Peak Pressure (TPP)

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Tozzi, Andrea, Andrea Castellucci, Giuseppe Ferrulli, et al. "Low-Frequency Air–Bone Gap and Pulsatile Tinnitus Due to a Dural Arteriovenous Fistula: Considerations upon Possible Pathomechanisms and Literature Review." Audiology Research 13, no. 6 (2023): 833–44. http://dx.doi.org/10.3390/audiolres13060073.

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Low-frequency air–bone gap (ABG) associated with pulsatile tinnitus (PT) and normal impedance audiometry represents a common finding in patients with third window syndromes. Other inner disorders, including Meniere’s disease (MD), perilymphatic fistula and intralabyrinthine schwannoma, might sometimes result in a similar scenario. On the other hand, PT is frequently associated with dural arteriovenous fistula (DAVF), while conductive hearing loss (CHL) is extremely rare in this clinical setting. A 47-year-old patient was referred to our center with progressive left-sided PT alongside ipsilateral fullness and hearing loss. She also experienced headache and dizziness. Otoscopy and video-oculographic examination were unremarkable. Conversely, a detailed instrumental audio-vestibular assessment revealed low-frequency CHL with normal impedance audiometry, slight left-sided caloric weakness, slightly impaired vestibular-evoked myogenic potentials on the left and normal results on the video-head impulse test, consistent with an MD-like instrumental profile. Gadolinium-enhanced brain MRI revealed an early enhancement of the left transverse sinus, consistent with a left DAVF between the left occipital artery and the transverse sinus, which was then confirmed by angiography. A trans-arterial embolization with Onyx glue was performed, resulting in a complete recession of the symptoms. Post-operatively, the low-frequency ABG disappeared, supporting the possible role of venous intracranial hypertension and abnormal pressure of inner ear fluids in the onset of symptoms and offering new insights into the pathomechanism of inner ear CHL.

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Pooja, Pradeep, Karuthedeth Sridevi, Anie Melootil Thomas, Ariyamparampil Rajagopalan Vinayakumar, and Pulakkil Arun. "Changes in the hearing threshold using high frequency audiometry in medical personnel exposed to ionizing radiation." International Journal of Otorhinolaryngology and Head and Neck Surgery 4, no. 6 (2018): 1411. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20184352.

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Background: Effect on sensorineural hearing loss by low dose ionizing radiation exposure in radiation workers has been rarely evaluated. A case control study was done among the radiation associated workers and normal subjects.Methods: The study was designed in low dose of radiation exposing healthy medical personnel. Age and sex matched healthy control group of subjects were selected. Groups were evaluated by normal otoscopic evaluation; normal tuning fork test and normal standard pure tone audiogram at frequencies from 250 to 8000 Hz. They underwent impedance audiometry, transient evoked otoacoustic emissions, and high frequency audiometry (from frequencies 10000 to 20000 Hz) was done. Results: No statistically significant difference was found in the results of impedance audiometry, transient evoked otoacoustic emissions and standard pure tone audiogram from 250 to 8000 Hz between cases and controls. In the high frequency range, statistically significant difference was observed (p=0.0001). Mean thresholds were higher at all frequencies in cases compared to controls, except at 4000 Hz. A statistically significant correlation was found between duration of exposure and thresholds at 500 Hz (p=0.014) and 10000 Hz (p=0.048). Tinnitus, vertigo, ear block, hard of hearing and loss of appetite were seen more in cases, but was not significant.Conclusions: Taking account of the very low incidence of nerve and parathyroid injury in this series, the authors suggest that meticulous capsular dissection is superior to dissection of the entire nerve in avoiding transcient nerve damage as well as temporary hypocalcemia. However it is stated that a deliberate search for the nerve is definitely indicated in cases where there is likely to be distorted anatomy, as in infiltrating malignancies and recurrent thyroidectomies.

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Agaman, G., and Jayita D. Poduval. "Impact of adenoidectomy on middle ear function in children between 5-12 years of age with chronic adenoiditis." International Journal of Otorhinolaryngology and Head and Neck Surgery 7, no. 10 (2021): 1611. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20213894.

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Background: Otitis media with effusion (OME) is an inflammatory disorder of the middle ear that is characterised by the presence of endotympanic fluid without any sign or symptom of acute ear infection, which may lead to hearing loss or long-term sequelae and have a negative impact on speech development and behaviour. Aim of the study was to determine the influence of adenoidectomy on middle ear function in children with chronic adenoiditis and to correlate degree of adenoid hypertrophy with middle ear function.Methods: This cross-sectional study comprised 50 cases, who were 5-12 years of either sex presenting to ear, nose and throat outpatient department (ENT OPD) with grade 3, 4 adenoid hypertrophy. After detailed history and clinical examination, investigations such as pure tone audiogram, impedance audiometry, X-ray nasopharynx and diagnostic nasal endoscopy were carried out to confirm the diagnosis. All patients were posted for adenoidectomy by curettage. They were followed up at 1st, 3rd and 6th month for pure tone audiometry and impedance was done at 6th month of surgery. Results: In this study, maximum number (82%) of cases belonged to more than 7 years age group. On otoscopy, dull, amber coloured tympanic membranes ™ was the most common finding in 78% of cases. 66% had adenoid hypertrophy grade three and 34% had adenoid hypertrophy grade four. Mean audiometry findings at preoperative, and one month and 3 months post-op intervals are 24.2, 13.28 and 12.2, and the p value is less than 0.0001, which is statistically significant.Conclusions: It may be concluded, that adenoidectomy completely eliminates the effusion in the middle ear cavity and exhibits significant postoperative hearing improvement.

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K., Vinod M., Amanjot Kaur, Jagdeepak Singh, et al. "A study of clinical and audiometric profile in patients presenting with sudden sensorineural hearing loss." International Journal of Otorhinolaryngology and Head and Neck Surgery 3, no. 2 (2017): 336. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20171189.

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Background: To assess the clinical and audiometric profile in patients presenting with sudden sensorineural hearing loss (SSNHL).The study also aimed to find out any possible etiology of SSNHL, prognostic factors and effectiveness of treatment. Prospective, open label, randomized study conducted in department of ENT at the Ram Lal eye and ENT hospital attached to Government medical college, Amritsar, Punjab, India.Methods: 50 patients of either sex aged between 18 to 50 years suffering from unilateral or bilateral onset SSNHL included in the study on the basis of predetermined clinical criteria. The hearing assessments of patients were done before and after the treatment with tuning fork tests, pure-tone and impedance audiometry. Results: Most of the patients of SSNHL presented with unknown etiology. Steroid treatment gave a statistically significant improvement in pure tone averages. Maximum improvement is observed in patients who started treatment within one month of developing SSNHL. Post-treatment outcomes were not influenced by age of the patient and type of the pure tone audiometry graph. The presence of vertigo and diabetes are bad prognostic factors for hearing outcome in SSNHL.Conclusions: Most of the cases of sudden sensorineural hearing loss have unknown etiology. Patients with associated DM and vertigo are having poor recovery of hearing. Early starting of treatment gives maximum improvement of hearing.

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Zipfel, Terrence E., Srinivas R. Kaza, and J. Scott Greene. "Middle-ear myoclonus." Journal of Laryngology & Otology 114, no. 3 (2000): 207–9. http://dx.doi.org/10.1258/0022215001905120.

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Tinnitus produced by repetitive contraction of the middle-ear muscles is a rare condition. We present an interesting case of bilateral middle-ear myoclonus causing incapacitating tinnitus in a patient with multiple sclerosis. Otological examination demonstrated rhythmic involuntary movement of the tympanic membrane. These movements correlated with a rhythmic ‘rushing wind’ noise perceived by the patient. Oropharyngeal examination showed no evidence of palatal myoclonus. Impedance audiometry confirmed rhythmic change in the middle-ear volume. Medical management was unsuccessful. The patient’s tinnitus was subsequently cured with bilateral sectioning of the tensor tympani and stapedial tendons.

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Hullar, Timothy E. "Vascular Pulsations on Impedance Audiometry as a Sign of a Third-Mobile Window Lesion." Otology & Neurotology 31, no. 4 (2010): 565–66. http://dx.doi.org/10.1097/mao.0b013e3181db7324.

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Raj-Koziak, Danuta, Elżbieta Gos, Justyna Kutyba, Henryk Skarzynski, and Piotr H. Skarzynski. "Decreased Sound Tolerance in Tinnitus Patients." Life 11, no. 2 (2021): 87. http://dx.doi.org/10.3390/life11020087.

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(1) Background: Decreased sound tolerance is a significant problem in tinnitus sufferers. The aim of the study was to evaluate the relationship between tinnitus and decreased sound tolerance (hyperacusis and misophonia). (2) Methods: The study sample consisted of 74 patients with tinnitus and decreased sound tolerance. The procedure comprised patient interviews, pure tone audiometry, impedance audiometry, measurement of uncomfortable loudness levels, and administration of the Hyperacusis Questionnaire, Tinnitus Handicap Inventory, and Visual Analogue Scales. (3) Results: The majority (69%) of the patients reported that noise aggravated their tinnitus. The correlation between tinnitus and hyperacusis was found to be statistically significant and positive: r = 0.44; p < 0.01. The higher the tinnitus severity, the greater the hyperacusis. There was no correlation between misophonia and hyperacusis (r = 0.18; p > 0.05), or between misophonia and tinnitus (r = 0.06; p > 0.05). (4) Conclusions: For tinnitus patients the more significant problem was hyperacusis rather than misophonia. The diagnosis and treatment of decreased sound tolerance should take into account not only audiological, but also psychological problems of the patients.

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Harkare, Vivek, Komal Kakad, Sonali Khadakkar, et al. "Evaluation of Hearing Status and Eustachian Tube Function in Oral Submucous Fibrosis: A Cross Sectional Study." Bengal Journal of Otolaryngology and Head Neck Surgery 29, no. 3 (2022): 265–72. http://dx.doi.org/10.47210/bjohns.2021.v29i3.561.

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Introduction Oral Submucous Fibrosis (OSMF) in severe cases involves palatal and paratubal muscles of Eustachian tube leading to Eustachian tube dysfunction and hearing disabilities. This study aims to evaluate to evaluate hearing status and Eustachian tube function in patients of Oral Submucous Fibrosis and to correlate them with various groups of the disease. Materials and Methods A Cross Sectional study was carried out in a Tertiary Care Hospital on diagnosed patients of OSMF. Patients with hearing loss due to other middle ear pathologies or previous ear surgeries were excluded. Patients were classified into various Groups depending on the severityof the disease. They were subjected to Pure Tone Audiometry and Impedance Audiometry. Results obtained were statistically analysed. Results A total of 121 patients (242 ears) were included in the study. On Pure Tone Audiometry, minimal hearing loss was found in 20(8.26%) ears while mild and moderate hearing loss was seen in 26(10.74%) and 28(11.58%) ears respectively. On tympanometry, Type B and Type C tympanograms(abnormal) were seen in 36(14.88) and 26(10.74%) ears, respectively. On Eustachian Tube Function Test, out of 242 ears, 67 ears (27.68%) showed Eustachian tube dysfunction. On using Pearson’s chi square test, significant association was found between degree of hearing loss, type of tympanograms and eustachian tube function with various groups of OSMF (p value < 0.05). Conclusion OSMF may affect hearing efficiency and Eustachian tube function as the disease progresses.

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C, Sathyaki D. "A clinico-epidemiological study of hearing loss in adult patients presenting to a tertiary healthcare center in India." MedPulse - International Journal of ENT 19, no. 3 (2021): 18–20. http://dx.doi.org/10.26611/10161932.

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Background: The objectives of the study are: 1. To determine the profile of patients presenting with hearing loss. 2. To determine the causes of hearing loss in adult patients of various age groups. The cases for the study comprised of adult patients aged >/=20years, presenting to the ENT Out-patient Department with complaint of hearing loss. Detailed history thorough ENT examination including Examination of the ear, nose and throat with Bull’s eye lamp, Otoscopic/Otomicroscopic/Otoendoscopic examination with photo-documentation of the ear status when required, tuning fork tests, and a battery of audiological tests including pure-tone audiometry, impedance audiometry and Brain-stem Evoked Response audiometry (when required) were conducted and the reports of the same were enclosed with the Pro forma of the patients. Results and Discussion: Hearing loss is more common in old age and more male patients presented with hearing loss. The most common symptom seen with hearing loss was tinnitus which was commonly ringing type and this was commonly seen in older patients associated with sensori-neural hearing loss. The most common type of hearing loss was sensori-neural hearing loss seen more commonly in older patients and associated with tinnitus. The definitive diagnosis for patients with sensori-neural hearing loss was difficult to specify with the most common diagnosis being presbyacusis, followed by noise induced hearing loss. The second common diagnosis was Chronic Otitis Media(COM).

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Lachowska, Magdalena, Monika Prus-Ostaszewska, and Kazimierz Niemczyk. "Distortion-product otoacoustic emission phase shift test (Shift-DPOAE) – methodology of measurements and interpretation of results in example cases." Polski Przegląd Otorynolaryngologiczny 8, no. 4 (2020): 1–5. http://dx.doi.org/10.5604/01.3001.0013.7953.

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Aim: The aim was to present methodology and interpretation of results of phase shift distortion-product otoacoustic emissions (Shift-DPOAE) in healthy subjects and patients with Meniere’s disease in remission stage and at the time of attack. Material and methods: Shift-DPOAE was performed in two healthy subjects without any otologic or neurologic problems and in six patients diagnosed with Meniere’s disease. Results obtained in eight subjects are oresented. The following tests were performed in all subjects: detailed otoscopy, impedance audiometry, pure tone audiometry, DPOAE, and Shift-DPOAE. Results: The normal Shift-DPOAE results obtained in two healthy subjects as well as the normal (two subjects) and abnormal (four subjects) Shift-DPOAE results obtained in patients with Meniere's disease are presented in order to thoroughly discuss the methodology and interpretation of the Shift-DPOAE study. Conclusions: The Shift-OAE is a promising diagnostic tool with great clinical potential in the diagnosis and monitoring of Meniere's disease in patients whose hearing has not yet been damaged. This examination is completely non-invasive, it can be carried out immediately after an attack of the disease with symptoms present at the time of the test, and it takes just a few minutes.

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Kundal, Pankaj, Anupam Goswami, Kapil Mehar, Nancy Aggarwal, and Manjusha Rajagopala. "Management of subjective tinnitus with conductive hearing loss through Ayurveda: An experience." Journal of Ayurveda Case Reports 7, no. 3 (2024): 148–52. http://dx.doi.org/10.4103/jacr.jacr_93_23.

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Tinnitus (~Karnanada) is a type of perception of sound that people occasionally experience in the absence of an accompanying external sound. The noise can be intermittent or continuous and can vary in loudness. Tinnitus is frequently linked to hearing loss and impaired speech understanding in noisy settings. A 31-year-old female patient came to the outpatient department with complaints of annoying sounds in both ears, hearing impairment in the right ear, headache, and disturbed sleep for the past 3 years. The patient was examined using tuning fork test, pure-tone audiometry, and impedance audiometry, which led to a diagnosis of subjective tinnitus with conductive hearing loss in both ears. The difficulties faced by the patient in daily life due to tinnitus were assessed using the Tinnitus Handicap Inventory (THI) questionnaire and the THI score. The patient was treated with Nirgundyadi taila karnapurana (~instillation of medicated oil in the ear) along with Ashwagandhadi ghrita orally for 21 days. The patient showed relief in tinnitus along with an improvement in hearing loss. There was no recurrence during a follow-up period of 30 days. The treatment reveals that Ayurvedic interventions are effective in the management of tinnitus quite efficiently.

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Gabr, Takwa, Hossam Debis, and Ahmed Hafez. "Electric Auditory Brainstem Response Audiometry in Cochlear Implants: New Recording Paradigm." Audiology Research 14, no. 4 (2024): 581–92. http://dx.doi.org/10.3390/audiolres14040049.

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(1) Background: Cochlear implants (CIs) are widely applied to recover audition for patients with severe degrees of or total hearing loss. Electrical stimulation using the electrically evoked ABR (E-ABR) can be recorded in CI recipients through the device. This work was designed to study E-ABR recorded individually from different channels located at the apical, middle, and basal cochlear regions in comparison to their simultaneous separated or adjacent combined recordings. (2) Methods: This study included 17 children fitted with unilateral cochlear implants. All children were subjected to impedance measurement, electrical compound action potentials (ECAP), and E-ABR recording of three channels located at the apical, middle, and basal cochlear regions. This was followed by simultaneous E-ABR recording of the three “separated” channels in comparison to E-ABR recording from three adjacent channels located at the middle cochlear region. (3) Results: Similar E-ABR latencies and amplitudes were found using either individual or simultaneously separated or adjacent combined recording. However, the mean amplitude measures of E-ABR for combined adjacent channels showed a positive correlation with the applied current level. (4) Conclusions: Combined E-ABR recording from adjacent channels is a faster and more reliable technique that can be used effectively without compromising the results of the recorded E-ABR.

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de Melo, Ana, Cibele Santos, and Andréa Lopes. "A study of the high-frequency hearing thresholds of dentistry professionals." International Archives of Otorhinolaryngology 16, no. 02 (2012): 226–31. http://dx.doi.org/10.7162/s1809-97772012000200012.

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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.

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Manhas, Monica. "ASSESSMENT OF HEARING IN ADULTS WITH HYPOTHYROIDISMA TERTIARY CARE CENTRE STUDY." UP STATE JOURNAL OF OTOLARYNGOLOGY AND HEAD AND NECK SURGERY VOLUME 11, ISSUE 2 (2023): 8–14. http://dx.doi.org/10.36611//upjohns/volume11/issue2/2.

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OBJECTIVE The study was done to evaluate the hearing loss in adults (> 18 years of age) with hypothyroidism and compared it with the euthyroid patients who presented in OPD with complaints other than hearing loss. Furthermore, the type and severity of hearing loss was also assessed. We also compared the degree of hearing loss with the extent of thyroid hormone deficiency in patients with hypothyroidism. MATERIALS AND METHODS A case-control study was conducted in adults more than 18 years of age in which 65 hypothyroid patients and 65 healthy individuals were evaluated by audiological testing which included p u r e t o n e a u d i o m e t r y a n d i m p e d a n c e audiometry. RESULTS Approximately 70.7% of the hypothyroid patients had sensorineural hearing loss affecting bilateral ear and about 58.4% of these patients had mild hearing loss. The degree of hearing loss was affected by the serum thyroid stimulating hormone levels. CONCLUSION The study revealed that hypothyroidism has significant corelation with sensorineural hearing loss. Hearing evaluations should be done in patients with thyroid disease thus starting the treatment as soon as possible to halt the progression of hearing loss. Keywords Hypothyroidism, Hearing loss, Audiometry, Impedance

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Ustinovich, K. N., and E. P. Merkulova. "Features of impedance audiometry in children of the first months of life after acute otitis media." Vestnik otorinolaringologii 86, no. 3 (2021): 41. http://dx.doi.org/10.17116/otorino20218603141.

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Vainutienė, Vija, Justinas Ivaška, Jolanta Dadonienė, Vilma Beleškienė, Tatjana Ivaškienė, and Eugenijus Lesinskas. "Audiological Manifestations in Patients with Granulomatosis with Polyangiitis." Medicina 60, no. 2 (2024): 267. http://dx.doi.org/10.3390/medicina60020267.

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Background and Objectives: Granulomatosis with Polyangiitis (GPA) is a rare, autoimmune, multisystemic disease characterized by vasculitis and necrotizing granuloma that commonly affects the upper and lower respiratory tract and kidneys. Audiovestibular dysfunction in GPA diseases may have different clinical presentations. The aim of the present study was to evaluate hearing function in patients with GPA and to compare the results with a healthy control group. Materials and Methods: A total of 34 individuals participated in the study. The GPA group consisted of 14 participants, and the control group was composed of 20 healthy participants with no signs or symptoms of ear disease. The ages ranged from 18 to 65 years old, with a mean age of 43.8 years. The participants underwent a complete audiological evaluation using otoscopy, impedance audiometry, pure tone audiometry, speech audiometry—evaluation of speech thresholds, and speech recognition in quiet. Both ears were tested. All of the participants of the study were native Lithuanian speakers. Data were statistically analyzed using the Statistical Analysis System software SAS® Studio 3.8. A p value < 0.05 was regarded as statistically significant. Results: 92.85% of patients from the GPA group reported hearing-related symptoms: hearing loss, tinnitus, and fullness in the ears. The arithmetic means of all hearing thresholds at frequencies from 125 Hz to 8000 Hz were significantly higher in the GPA group. The results revealed statistically significant differences between the two groups in the Speech Detection Threshold, Speech Recognition Threshold, Speech Discomfort level, and Word Recognition Scores. Conclusions: The frequency of hearing loss, the average hearing thresholds, and speech thresholds were higher in GPA patients than in healthy individuals. The most common type of hearing loss was sensorineural. Audiological assessments should be considered during the routine evaluation of patients with GPA disease to prevent hearing-related disabilities.

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Journal articles on the topic 'Impedance audiometry'

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