Autophony in Patients with Patulous Eustachian Tube

Kawase, Tetsuaki; Kano, Shigeyuki; Otsuka, Toshihiko; Hamanishi, Shinji; Koike, Takuji; Kobayashi, Toshimitsu; Wada, Hiroshi

doi:10.1097/01.mao.0000226294.26918.1d

Cited by 16 publications

(5 citation statements)

References 15 publications

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“…Kawase et al . [ 36 ] found that the SPL in healthy subjects was around 20 dB higher in the nasal cavity than in the ear canal. Measurements in patients with open Eustachian tube have shown an increase in the auditory threshold of 40 dB after treatment of the tube (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…In healthy people with a closed Eustachian tube, we can estimate the SPL reaching the medial tympanic membrane surface relative to the lateral membrane surface due to self-generated sounds. Kawase et al [36] found that the SPL in healthy subjects was around 20 dB higher in the nasal cavity than in the ear canal. Measurements in patients with open Eustachian tube have shown an increase in the auditory threshold of 40 dB after treatment of the tube (i.e.…”

Section: Middle Ear Vibration Experiments 411 Experimental Approachmentioning

confidence: 98%

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Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening

et al. 2017

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Because the quadrate and the eardrum are connected, the hypothesis was tested that birds attenuate the transmission of sound through their ears by opening the bill, which potentially serves as an additional protective mechanism for self-generated vocalizations. In domestic chickens, it was examined if a difference exists between hens and roosters, given the difference in vocalization capacity between the sexes. To test the hypothesis, vibrations of the columellar footplate were measured ex vivo with laser Doppler vibrometry (LDV) for closed and maximally opened beak conditions, with sounds introduced at the ear canal. The average attenuation was 3.5 dB in roosters and only 0.5 dB in hens. To demonstrate the importance of a putative protective mechanism, audio recordings were performed of a crowing rooster. Sound pressures levels of 133.5 dB were recorded near the ears. The frequency content of the vocalizations was in accordance with the range of highest hearing sensitivity in chickens. The results indicate a small but significant difference in sound attenuation between hens and roosters. However, the amount of attenuation as measured in the experiments on both hens and roosters is small and will provide little effective protection in addition to other mechanisms such as stapedius muscle activity.

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Section: Discussionmentioning

confidence: 99%

Section: Middle Ear Vibration Experiments 411 Experimental Approachmentioning

confidence: 98%

Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening

et al. 2017

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“…The middle ear air cushion effect, including the influence of pars flaccida, has been documented quite extensively (30,32,(69)(70)(71)(72). The effect of mastoid volume, in an artificial ear (73) and in cadaveric ears (74) is, as expected, most pronounced for the lower frequencies ("combination of multiple resonators").…”

Section: Technical Arguments Related To Slow and Medium Actuatorsmentioning

confidence: 73%

Tympanic Resonance Hypothesis

Boedts

2020

Front. Neurol.

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Seemingly unrelated symptoms in the head and neck region are eliminated when a patch is applied on specific locations on the Tympanic Membrane. Clinically, two distinct patient populations can be distinguished; cervical and masticatory muscle tensions are involved, and mental moods of anxiety or need. Clinical observations lead to the hypothesis of a "Tympanic Resonance Regulating System." Its controller, the Trigeminocervical complex, integrates external auditory, somatosensory, and central impulses. It modulates auditory attention, and directs it toward unpredictable external or expected domestic and internal sounds: peripherally by shifting the resonance frequencies of the Tympanic Membrane; centrally by influencing the throughput of auditory information to the neural attention networks that toggle between scanning and focusing; and thus altering the perception of auditory information. The hypothesis leads to the assumption that the Trigeminocervical complex is composed of a dorsal component, and a ventral one which may overlap with the concept of "Trigeminovagal complex." "Tympanic Dissonance" results in a host of local and distant symptoms, most of which can be attributed to activation of the Trigeminocervical complex. Diagnostic and therapeutic measures for this "Tympanic Dissonance Syndrome" are suggested.

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“…Sonotubometry has been used since 1978 5 for PET diagnosis. However, Kawase et al 19 reported that tubal sound transmission results may vary according to anatomic and physiological variations of cavities. Slow‐motion nasal endoscopy studies could assess the motricity of the tubal ostium and therefore detect anatomical abnormalities but have high interindividual variations and rely heavily on patient compliance 20 .…”

Section: Discussionmentioning

confidence: 99%

Place of Tubomanometry in Patulous Eustachian Tube Diagnosis

Ros¹,

Gargula²,

Montava

et al. 2022

Otolaryngol.--head neck surg.

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Objective The aim of our study was to describe the diagnostic performances of tubomanometry (TMM) and to determine tubomanometric parameter thresholds for the diagnosis of patulous eustachian tube (PET). Study Design We performed a retrospective, monocentric study, including patients treated for PET vs control group. Setting This study was performed at the Otolaryngology Department of a tertiary-care hospital in the south of France. Methods We collected epidemiologic and clinical data, as well as adjusted opening latency index (“R”-index), rhinopharyngeal pressure threshold of tubal opening (Po), and velar contraction index (IVC) on TMM. Receiver operating characteristic (ROC) curves were used for determination of R index and Po thresholds. Results Twenty-one patients (26 patulous ears) and 14 controls (24 normal ears) were included. The R index values and Po values were significantly lower in the PET group vs controls (0.46 vs 0.80, respectively; P < .05 for R index and 13.89 vs 26.42 mbar, respectively; P < .05 for Po). No significant difference was reported between the 2 groups on IVC measurement ( P = .784). After ROC curve analysis, R index was the most discriminating factor to classify PET patients with 89% specificity and 76% sensitivity with a threshold ≤0.6. Po value ≤10 mbar could support this diagnosis with more than 83% specificity. Conclusion TMM is a reliable noninvasive method for positive diagnosis of PET. TMM could provide an accurate positive PET diagnosis and an objective evaluation for PET management.

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Autophony in Patients with Patulous Eustachian Tube

Abstract: Patulous symptoms may be more distressful in patients with poorly developed mastoid cavity than in those with well-aerated mastoid under similar conditions of patulous ET.

Cited by 16 publications

References 15 publications

Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening

Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening

Tympanic Resonance Hypothesis

Place of Tubomanometry in Patulous Eustachian Tube Diagnosis

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