Measurement of Wideband Absorbance as a Test for Otosclerosis

Śliwa, Lech; Kochanek, Krzysztof; Jędrzejczak, Wiesław Wiktor; Mrugała, Kacper; Skarżyńśki, Henryk

doi:10.3390/jcm9061908

Cited by 6 publications

(6 citation statements)

References 38 publications

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“…These findings are very similar to what has been found previously and have an identical absorbance pattern. However, the reported frequencies of maximum absorbance are not exactly consistent across studies and are reported to be anywhere between 2000 and 4000 Hz [16][17][18]. A few studies have shown other maxima in the region of 1000 Hz to 1500 Hz [16,19], whereas the present study found maximum absorbance at 2000 Hz.…”

Section: Discussioncontrasting

confidence: 87%

Evaluation of Wideband Absorbance Tympanometry in Adults With Abnormal Positive and Negative Middle Ear Pressure

Karuppannan¹,

Barman²

2020

J Hear Sci

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BackgroundMiddle ear pressure plays a vital role in the transmission of sound to the inner ear. However, limited research data exists to understand the effect of abnormal middle ear pressure on wideband absorbance (WBA) tympanometry. The purpose of the study was to evaluate WBA at peak pressure and ambient pressure in adults with abnormal positive and negative middle ear pressure and compare them with normal adult ears having normal middle ear pressure.Material and methodsThree groups of adults – normal middle ear pressure group (56 ears), negative middle ear pressure group (30 ears), and positive middle ear pressure group (15 ears) – in the age range 22 to 50 years were considered. WBA was measured at peak and ambient pressures across the frequencies from 250 to 8000 Hz.ResultsWBA at peak pressure was observed to be higher than at ambient pressure in all the groups, with the difference seen mostly at low and mid-frequencies up to 2000 Hz. The negative middle ear pressure group showed the most considerable difference in mean WBA, seen between 600 Hz and 1000 Hz, followed by the positive middle ear pressure group, with a negligible difference for the normal middle ear pressure group.ConclusionsThe study highlighted the importance of measuring WBA at peak pressure and ambient pressure. The results suggest that the comparison of WBA at peak and ambient pressures, especially from lower to mid-frequencies up to 2000 Hz, would help in differentiating abnormal negative/positive pressure from normal middle ear pressure and also between ears having negative and positive pressure.

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Section: Discussioncontrasting

confidence: 87%

Evaluation of Wideband Absorbance Tympanometry in Adults With Abnormal Positive and Negative Middle Ear Pressure

Karuppannan¹,

Barman²

2020

J Hear Sci

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“…The test is highly effective, with a sensitivity and specificity of more than 85%. 20 In the present study, pressurized acoustic absorbance at 630 Hz can differentiate the control group from the presurgery group and the pre from the postsurgery group (►Table 2).…”

Section: Discussionmentioning

confidence: 53%

“…The cited studies, however, were conducted only at ambient pressure, that is, without pressurization; only more recent studies analyzed pressurized WBT in otosclerosis. 20,21 Analyzing acoustic absorbance at peak pressure can enhance its diagnostic value in disorders of the middle ear. The present study aims to map the amount of energy transferred to the system using wideband frequencies under ambient pressure and pressurized conditions.…”

Section: Introductionmentioning

confidence: 99%

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Wideband Acoustic Absorbance in Otosclerosis: Does Stapedotomy Restore Normal Tympanic Cavity Function?*

Durante

Nascimento

Almeida

et al. 2022

Int Arch Otorhinolaryngol

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Introduction Otosclerosis is characterized by the fixation of the stapes to the oval window, thereby impairing acoustic signal absorbance. A commonly used surgical technique for improving hearing in cases of otosclerosis is stapedotomy. However, it is unclear whether this surgery restores all the physical characteristics of the tympano-ossicular system. Objective To evaluate the tympano-ossicular system in individuals with fenestral otosclerosis pre and poststapedotomy using wideband tympanometry. Method A total of 47 individuals and 71 ears were assessed. The subjects were divided into three groups: presurgery otosclerosis; postsurgery; and a control group of normal-hearing adults. A handheld tympanometer with a wideband module (226–8,000 Hz) was used to take measurements at ambient pressure and under pressurized conditions. The level of statistical significance adopted was p ≤ 0.05. Results Acoustic absorbance at 226 Hz was low for all groups. At frequencies in the range 630 to 5,040 Hz, each group had a characteristic absorbance curve, allowing them to be distinguished from one another. In the presurgery group, absorbance values were below normal levels, with energy absorbance below 10%. Low energy absorbance was most evident at 1,000 Hz in the presurgery group, but this was not observed in the postsurgery group. Although there was an improvement in hearing, the surgery failed to restore the tympano-ossicular system to normal. Conclusion Wideband acoustic absorbance proved able to differentiate normal ears and otosclerotic ears pre and postsurgery, under both ambient pressure and pressurized conditions.

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“…The wide frequency range of the measurement renders it more independent from the external interference, making the test more accurate in assessing the middle ear pathology in adults compared with the classical tympanometry [20,27,28]. This method also allows for the measurement of absorbance without changes in pressure exerted on the tympanic membrane, making it extremely useful in examining tympanic membrane perforation, postoperative evaluation, after insertion of a transtympanic drain, and in the diagnosis of otosclerosis [29]. were compared.…”

Section: Resultsmentioning

confidence: 99%

The impact of regular diving on the condition of the middle ear

Stieler¹,

Loba²,

Gawęcki³

et al. 2021

Int J Occup Med Environ Health

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It is generally held that exposure to both high-pressure and long-lasting contact with water makes diving a potentially hazardous sports activity as far as the ears are concerned. There is a number of research investigating the condition of the middle ear in a short period following diving; however, the knowledge regarding the long-term effects of regularly repeated diving remains limited. Material and Methods: The aim of this study is to evaluate the function of the middle ear after a diving season in a group of 31 adults diving regularly (1-17 years) by means of the following methods: 1) interview, 2) otoscopy, 3) pure tone audiometry, 4) classic tympanometry, and 5) wideband tympanometry. Results: Periodic problems with pressure equalization in the middle ear were observed in 12 individuals (38.7%). In all the analyzed cases, the authors found a normal condition of the external auditory canal and the tympanic membrane in otoscopy, normal hearing in pure tone audiometry, curve type A, and normal gradient in both classic and wideband tympanometry. Conclusions: Safe diving (according to safety precautions) does not have any long-term negative effects on the condition of the middle ear. However, these observations should be verified in a larger group of divers. Int J Occup Med Environ Health. 2021;34(6)

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Measurement of Wideband Absorbance as a Test for Otosclerosis

Cited by 6 publications

References 38 publications

Evaluation of Wideband Absorbance Tympanometry in Adults With Abnormal Positive and Negative Middle Ear Pressure

Evaluation of Wideband Absorbance Tympanometry in Adults With Abnormal Positive and Negative Middle Ear Pressure

Wideband Acoustic Absorbance in Otosclerosis: Does Stapedotomy Restore Normal Tympanic Cavity Function?*

The impact of regular diving on the condition of the middle ear

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