Alteration of distortion product otoacoustic emission input/output functions in subjects with a previous history of middle ear dysfunction

Campos, Ualace de Paula; Sanches, Seisse Gabriela Gandolfi; Hatzopoulos, Stavros; Carvallo, Renata Mota Mamede; Kochanek, Krzysztof; Skarżyńśki, Henryk

doi:10.12659/msm.882605

Cited by 11 publications

(8 citation statements)

References 18 publications

(29 reference statements)

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“…However, although postoperative mean hearing thresholds were within range where OAEs were likely detectable, both TEOAEs and DPOAEs were not steadily detected. The results of the current study are consistent to the literature data indicating that OAEs are not always detected in cases of middle ear dysfunction history, despite the presence of normal audiometry measurements [ 13 ]. Thus, OAEs probably represent a more sensitive testing, reflecting the alterations of conduction in the middle ear compared to traditional audiometry.…”

Section: Discussionsupporting

confidence: 92%

The Profile of Otoacoustic Emissions and Multifrequency Tympanometry in Otosclerotic Patients Undergoing Two Types of Stapes Surgery: Small Fenestra and Microtraumatic Stapedotomy

Mantzari¹,

Maragoudakis

Kandiloros

et al. 2014

Med Sci Monit

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BackgroundOtoacoustic emissions (OAEs) are influenced in otosclerosis. The aim of the current study was to investigate the profile of transient evoked (TEOAEs) and distortion product otoacoustic emissions (DPOAEs) in association with multifrequency tympanometry measures in otosclerotic patients undergoing 2 types of stapes surgery: small fenestra and microtraumatic stapedotomy.Material/MethodsA retrospective analysis of prospectively collected data was conducted evaluating 51 otosclerotic patients and 50 normal hearing subjects. Small fenestra and microtraumatic stapedotomy were performed in 27 and 24 patients, respectively. Pure tone audiometry (PTA) was always measured. Detection of TEOAEs and DPOAEs at 5 frequency steps (1, 1.4, 2, 2.8, and 4 kHz) preoperatively and at 2 and 5 months postoperatively, stratified by the type of surgery, represented the main goal of the study. Resonant frequency derived by multifrequency tympanometry was also evaluated.ResultsAll patients demonstrated improvement in hearing level postoperatively, with significant closure of air-bone gap on PTA. Resonant frequency values returned to normal after microtraumatic stapedotomy but were exceedingly decreased following the small fenestra technique. The detection of both TEOAEs and DPOAEs was improved, but when the detection was stratified by the tested frequencies, significant increase in the number of patients with detectable OAEs was observed, mainly during testing at 1 and 1.4 kHz.ConclusionsOtosclerotic patients exhibited improvement in the detection of OAEs, particularly at low frequencies, after both procedures. Resonant frequency was normalized following the microtraumatic stapedotomy, whereas it is over-decreased after the small fenestra technique.

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Section: Discussionsupporting

confidence: 92%

The Profile of Otoacoustic Emissions and Multifrequency Tympanometry in Otosclerotic Patients Undergoing Two Types of Stapes Surgery: Small Fenestra and Microtraumatic Stapedotomy

Mantzari¹,

Maragoudakis

Kandiloros

et al. 2014

Med Sci Monit

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“…Our findings corroborate the literature and point to a history of OME interfering with OAE generation. Another study [ 16 ] has also reported that a history of OME can disrupt cochlear amplification, for which outer hair cells are essential, suggesting that OME may lead to impairment of these structures.…”

Section: Discussionmentioning

confidence: 99%

“…Duplessis and Fothergill [ 48 ] attributed reduced DPOAE amplitudes to the middle ear, so that there was a reduction in amplification by the middle ear. One study of DPOAE growth curves in individuals with middle ear alterations [ 16 ] found that DPOAEs could effectively identify changes in individuals with OME. In the present study, we observed a statistically significant difference in SNR values at all frequencies (except at 2542 Hz), whereas a similar study [ 16 ] found reduced DPOAE amplitudes at 2002, 3174, and 4004 Hz.…”

Section: Discussionmentioning

confidence: 99%

“…The presence of otoacoustic emissions indicates that the pre-neural reception mechanism in the cochlea is able to respond to sound; it also indicates that the middle ear mechanism is intact and can allow sound to be transmitted through the tympano-ossicle system to the external acoustic meatus [ 12 , 13 ]. Thus, impairments of the middle ear and cochlea have a considerable effect on the response level of OAEs [ 14 ], making OAEs a highly sensitive test for cochlear changes or minor middle ear dysfunction [ 15 , 16 ]. In addition, OAEs are considered an effective method for detecting auditory alterations at an early stage, since they can pick up changes before pure tone audiometry is able to [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Otoacoustic Emissions in Children with Long-Term Middle Ear Disease

Sanfins

Bertazolli

Skarżyński

et al. 2020

Life

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Introduction: Otoacoustic emissions (OAEs) evaluate the functional status of the cochlea. Repeated otitis media (OM) can cause changes in the peripheral structures of the auditory system, and, in this way, middle ear infection may irreversibly damage the middle ear, or even the cochlea. Objectives: To analyze the results of transiently evoked otoacoustic emissions (TEOAEs) and distortion product otoacoustic emissions (DPOAEs) in individuals with a history of OM. Method: Participants with 8 to 16 years of schooling were split into two groups: a control group (CG) of 50 subjects who had no history of otological disease and an experimental group (EG) of 50 subjects who had a history of recurrent otitis in childhood and had consequently undergone myringotomy to insert bilateral ventilation tubes. All children underwent basic audiological assessment (tonal audiometry, speech audiometry, and immittance testing) and otoacoustic emission testing (TEOAEs and DPOAEs). Results: There were no significant differences between the groups when audiometrically tested via air and bone conduction. OAEs were found in all CG subjects. For the EG, there were no TEOAE responses in 17 ears and no DPOAEs in nine ears; response amplitudes were lower at all frequencies. The emission level and the signal-to-noise ratio were statistically different between the two groups, and OAEs in the EG were statistically smaller compared to the GC. Conclusion: In the EG, responses were more likely to be absent and were of statistically smaller amplitude compared to the CG. A history of repeated OM apparently interferes with the generation and transmission of TEOAEs and DPOAEs.

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“…Alterations in terms of reduced DPOAE responses have also been reported in individuals with a previous history of OME. 10 A long-standing middle-ear condition might cause minor, but irreversible damage to the middle ear or cochlea. Otoacoustic emissions can be used as a tool to measure this subclinical damage.…”

Section: Introductionmentioning

confidence: 99%

Effect of chronic suppurative otitis media on distortion product otoacoustic emission input–output functions in conventional and ultra-high frequencies

et al. 2019

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BackgroundDetection and valid measurements of distortion product otoacoustic emissions are not influenced by cochlear status alone, but also by middle-ear status. There is a need to understand the use of ultra-high frequency distortion product otoacoustic emissions in cases of abnormal distortion product otoacoustic emission findings for conventional frequencies related to the middle-ear condition.MethodThe present study investigated distortion product otoacoustic emission input–output functions in conventional and ultra-high frequencies in: 37 adults with chronic suppurative otitis media (clinical group) and 37 adults with normal hearing sensitivity (control group).ResultsThere were significant reductions in distortion product otoacoustic emission amplitude and mean signal-to-noise ratio in the clinical group compared to the control group, especially for conventional frequencies.ConclusionThere was a significant reduction in the rate of ears with measurable distortion product otoacoustic emissions in the clinical group, especially for conventional frequencies. The effect of chronic suppurative otitis media was more pronounced in the conventional frequency range compared to the smaller effect seen in the ultra-high frequency range.

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Alteration of distortion product otoacoustic emission input/output functions in subjects with a previous history of middle ear dysfunction

Cited by 11 publications

References 18 publications

The Profile of Otoacoustic Emissions and Multifrequency Tympanometry in Otosclerotic Patients Undergoing Two Types of Stapes Surgery: Small Fenestra and Microtraumatic Stapedotomy

The Profile of Otoacoustic Emissions and Multifrequency Tympanometry in Otosclerotic Patients Undergoing Two Types of Stapes Surgery: Small Fenestra and Microtraumatic Stapedotomy

Otoacoustic Emissions in Children with Long-Term Middle Ear Disease

Effect of chronic suppurative otitis media on distortion product otoacoustic emission input–output functions in conventional and ultra-high frequencies

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