Choice of probe tone and classification of trace patterns in tympanometry undertaken in early infancy

Baldwin, Margaret

doi:10.1080/14992020600690951

Cited by 91 publications

(118 citation statements)

References 41 publications

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“…Estas diferenças ocorrem porque nos lactentes o sistema sofre maior influência do fator massa, enquanto que nos adultos é predominante o fator rigidez (13,22,23) e esta diferença pode ser captada pelo analisador de orelha média como oclusão.…”

Section: Discussionunclassified

“…Estudos (13,44) que avaliaram a sensibilidade e a especificidade da timpanometria indicaram que a sensibilidade da timpanometria convencional é maior que da timpanometria com alta frequência, sendo a especificidade da alta frequência maior que da timpanometria convencional.…”

Section: Discussionunclassified

“…Porém a literatura mostra que o uso de uma única frequência não é sensível o suficiente na detecção de todos os casos, o que dificulta o diagnóstico preciso (11)(12)(13)(14).…”

Section: Introductionunclassified

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Timpanometria em lactentes utilizando sonda multifrequencial

Moraes¹,

Macedo²,

Feniman³

2012

Arq Int Otorrinolaringol

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SUMMARYIntroduction: The use of conventional tympanometry is not sufficiently sensitive to detect all cases of middle ear changes, and this hinders accurate diagnosis. Objective: To characterize acoustic immittance measures of infants from 0 to 3 months of age using multifrequency tympanometry in a prospective study. Method: 54 infants from 0 to 3 months of age were evaluated. The inclusion criteria included absence of respiratory infections during the evaluation, presence of transient evoked otoacoustic emissions, and absence of risk indicators for hearing loss. The subjects were evaluated by an audiologic interview, a visual inspection of the ear canal, and measures of acoustic immittance at the frequencies of 226 Hz, 678 Hz, and 1,000 Hz. Tympanometric records of the occlusion effect, tympanometric curve type, tympanometric peak pressure, equivalent ear canal volume, and peak compensated static acoustic admittance were collected. Results: The results indicated the presence of an occlusion effect (2.88% at 226 Hz, 4.81% at 678 Hz and 3.85% at 1,000 Hz), predominance of a tympanometric curve with a single peak (65.35% at 226 Hz, 81.82% at 678 Hz, and 77.00% at 1,000 Hz), and tympanometric peak pressure ranging from -155 to 180 daPa. Further, the equivalent ear canal volume increased with the frequency of the probe (0.64 mL at 226 Hz, 1.63 mho at 678 Hz, and 2.59 mmho at 1,000 Hz) and the peak compensated static acoustic admittance values increased with an increase in frequency (0.51 mL at 226 Hz, 0.55 mmho at 678 Hz and 1.20 mmho at 1,000 Hz). 93.06% of the tympanograms were classified as normal at 226 Hz, 81.82% at 678 Hz, and 77.00 % at 1,000 Hz, respectively. Conclusion: Taken together, these results demonstrated that utilizing these evaluations made it possible to characterize the acoustic immittance measures of infants.

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Section: Discussionunclassified

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Timpanometria em lactentes utilizando sonda multifrequencial

Moraes¹,

Macedo²,

Feniman³

2012

Arq Int Otorrinolaringol

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“…and a tympanometric evaluation using a 1000 Hz probe compatible with absence of middle ear abnormality according to the classification proposed by Baldwin (2006) (7) adapted from Marchant et al (1986) (6) . We excluded infants with risk indicators for hearing loss (16) .…”

Section: Methodsmentioning

confidence: 99%

“…studies have analyzed the sensitivity of tympanometry using a 1000 Hz probe tone, showing lower false-negative rates (4,5) . Nevertheless, abnormalities may not be identified in some cases that fall into an "undetermined" tympanometric curve (6)(7)(8) , a circumstance in which the test fails to assist the audiologist in defining the presence or absence of conductive abnormalities.…”

Section: Introductionmentioning

confidence: 99%

Medidas de imitância acústica de banda larga com estímulo chirp e tom puro em lactentes com normalidade de orelha média

Santos

Araújo

Filho

et al. 2015

Audiol., Commun. Res.

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The reflectance values were shown to be greater for low frequencies, reducing to medium ones and increasing once again to high frequencies, while the absorbance values displayed an opposite behavior. No significant difference was verified between chirp and pure tone stimuli. Conclusion:A typical behavior of the measures, characterized by a higher reflectance at low frequencies and higher absorbance at medium frequencies was observed in the population studied. Observou-se um comportamento típico das medidas estudadas, caracterizado por maior reflectância nas frequências graves e maior absorvância para as frequências médias.Descritores: Orelha média; Testes de impedância acústica; Perda auditiva condutiva; Otite média; Audiologia This study was held at

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Hearing characteristics and otoradiological abnormalities in three patients with novel pathogenic variants of KMT2D‐related Kabuki syndrome

Zheng,

Ding,

Wang

et al. 2023

Molec Gen & Gen Med

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BackgroundKabuki syndrome 1 (KS1; OMIM:147920), which is characterized by distinctive dysmorphic facial features (such as arched eyebrows, long palpebral fissures with eversion of the lower lid, and large protuberant ears), intellectual disability, short stature, and dermatoglyphic and skeletal abnormalities, is brought on by pathogenic variants in KMT2D (OMIM:602113). In this work, three individuals with novel pathogenic KMT2D gene variants had their longitudinal audiological manifestations and ear structural characteristics outlined.MethodsThe longitudinal audiological data from neonatal hearing screening and a battery of several hearing tests were evaluated. The battery of hearing tests included tympanometry, distortion product otoacoustic emission (DPOAE), click‐evoked air‐conduction auditory brain‐stem response (AC‐ABR), click‐evoked bone‐conduction auditory brain‐stem response (BC‐ABR), narrow band CE‐chirp auditory steady‐state response (NB CE‐chirp ASSR), and pure‐tone audiometry (PTA). Phenotype identification and whole exome sequencing (WES) were performed on recruited individuals.ResultsAll three patients (two females and on male; last evaluations at 14 months, 11 months, and 5.7 years, respectively) failed the newborn hearing screening, and the audiological follow‐up data revealed mild to profound fluctuating hearing loss, which was directly influenced by the incidence and severity of otitis media with effusion (OME). When OME occurred, the AC‐ABR thresholds increased from 30–75 dBnHL to 45–90 dBnHL. The threshold for the BC‐ABR and BC‐PTA was between 25 and 50 dBnHL, indicating mild to moderate sensorineural hearing loss (SNHL). The high‐resolution computed tomography (HRCT) pictures indicated that all three patients had middle and inner ear abnormalities. Middle ear anomalies showed as diminished mastoid gasification and ossicle dysplasia. Cochlear dysplasia, a dilated vestibule, fusion of the vestibule with the horizontal semicircular canals, and a short and thick horizontal semicircular canal were visible on images of the inner ear. This study recruited three individuals with three novel pathogenic variants (c.5104C>T, c.10205delA, and c.12840delC) of KMT2D who were identified at ages 27 days, 2 months, and 5.5 years.ConclusionsHearing characteristics of three individuals with three novel pathogenic variants of KMT2D range from mild to profound fluctuating hearing loss with mild to moderate SNHL. HRCT scans showed that all three individuals had anatomical middle and inner ear abnormalities. KS 1 patients must get clinical therapy for OME, frequent auditory monitoring, and prompt intervention.

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Choice of probe tone and classification of trace patterns in tympanometry undertaken in early infancy

Cited by 91 publications

References 41 publications

Timpanometria em lactentes utilizando sonda multifrequencial

Timpanometria em lactentes utilizando sonda multifrequencial

Medidas de imitância acústica de banda larga com estímulo chirp e tom puro em lactentes com normalidade de orelha média

Hearing characteristics and otoradiological abnormalities in three patients with novel pathogenic variants of KMT2D‐related Kabuki syndrome

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