Sweep-Frequency Tympanometry: Its Development and Diagnostic Value

Funasaka, Sotaro; Funai, Hiroaki; Kumakawa, Kozo

doi:10.3109/00206098409081530

Cited by 46 publications

(21 citation statements)

References 8 publications

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“…More information can be obtained by using multiple frequencies (e.g. Alberti and Jerger 1974;Colletti 1975;Funasaka et al 1984;Keefe and Levi 1996;Shahnaz et al 2008). A number of groups have evaluated wideband measurements of immittance in newborns and infants, whether unpressurized (e.g.…”

Section: Introductionmentioning

confidence: 99%

Finite-Element Modelling of the Acoustic Input Admittance of the Newborn Ear Canal and Middle Ear

Motallebzadeh

Maftoon

Pitaro

et al. 2016

JARO

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Admittance measurement is a promising tool for evaluating the status of the middle ear in newborns. However, the newborn ear is anatomically very different from the adult one, and the acoustic input admittance is different than in adults. To aid in understanding the differences, a finite-element model of the newborn ear canal and middle ear was developed and its behaviour was studied for frequencies up to 2000 Hz. Material properties were taken from previous measurements and estimates. The simulation results were within the range of clinical admittance measurements made in newborns. Sensitivity analyses of the material properties show that in the canal model, the maximum admittance and the frequency at which that maximum admittance occurs are affected mainly by the stiffness parameter; in the middle-ear model, the damping is as important as the stiffness in influencing the maximum admittance magnitude but its effect on the corresponding frequency is negligible. Scaling up the geometries increases the admittance magnitude and shifts the resonances to lower frequencies. The results suggest that admittance measurements can provide more information about the condition of the middle ear when made at multiple frequencies around its resonance.

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Section: Introductionmentioning

confidence: 99%

Finite-Element Modelling of the Acoustic Input Admittance of the Newborn Ear Canal and Middle Ear

Motallebzadeh

Maftoon

Pitaro

et al. 2016

JARO

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“…The components of multi-frequency tympanometry are efficient for detecting mass-and stiffness-dominated pathologies [7,8] . They are also more sensitive for detecting small changes in the transmission of sound in the middle ear than single-frequency tympanometry [3] .…”

Section: Discussionmentioning

confidence: 99%

“…Acoustic reflexes were measured using 500, 1000, 2000, and 4000 Hz pure tones, which were presented to the ipsilateral and contralateral ears. Multi-frequency tympanometry was performed using the sweep frequency method described by Funasaka and Funai [8] using a GSI-TS middle ear analyzer. The RF, F45, and ΔG at the RF were recorded in the participants.…”

Section: Methodsmentioning

confidence: 99%

“…The procedure for recording different components of multi-frequency tympanometry is well described [8] . According to the procedure, frequencies are swept from 200Hz to 2000 Hz twice at +200 daPa and at peak pressure.…”

Section: Introductionmentioning

confidence: 99%

“…The different components of multi-frequency tympanometry such as RF, F45, and ΔG at the RF are extensively used in the differential diagnosis of different middle ear disorders [7,8] . The procedure for recording different components of multi-frequency tympanometry is well described [8] .…”

Section: Introductionmentioning

confidence: 99%

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Test-Retest Reliability of the Components of Multi-Frequency Tympanometry

Prabhu¹,

Manandhar²,

Ahmed³

2017

Int Adv Otol

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OBJECTIVE:Multi-frequency tympanometry and its components are extensively used to identify middle ear disorders. However, there are a limited number of studies that have attempted to determine its test-retest reliability. Thus, the present study attempted to determine the test-retest reliability of the different components of multi-frequency tympanometry. MATERIALS and METHODS:The resonant frequency (RF), F45, and ΔG were determined three times in 40adults with normal hearing. The results obtained across the three trials were compared to determine the test-retest reliability.RESULTS: F45 and ΔG had excellent intra-and inter-session reliabilities. The reliability of the RF was also good, but it was relatively less compared to that of the other two measures. The study also showed that there was no effect of gender on the reliability measures. CONCLUSION:Thus, F45 and ΔG can be clinically used considering theirhigh reliability, and the RF should be interpreted with caution. However, further studies on a larger group of patientsincluding a clinical group are essential for determining the further applicability of these results.

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