Airflow through the Eustachian Tube

Ei, Cantekin; Ca, Saez; Cd, Bluestone; Sa, Bern

doi:10.1177/000348947908800504

Cited by 78 publications

(71 citation statements)

References 10 publications

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“…18 The inflationdeflation test consisted of altering ME pressure to a set value ( ±250 mm H20) of positive or negative pressure. Pressure reduction and air flow associated with swallowing and tubai dilations were recorded.…”

Section: Methodsmentioning

confidence: 99%

Eustachian Tube Function in the Chinchilla

Doyle¹

1985

Archives of Otolaryngology - Head and Neck Surgery

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\s=b\Eustachian tube function (ETF) was evaluated in 22 ears of 18 chinchillas using the inflation-deflation and forcedresponse protocols. The results of the ETF tests showed an unusual function in the chinchilla. Of the 22 tests, one indicated a patulous eustachian tube (ET) and 20 suggested a semipatulous ET. This was evidenced by a passive, pressure\x=req-\ dependent, complete reduction of applied positive or negative ME pressures in these ears. This phenomenon has no counterpart in the ETF of rhesus monkeys or humans. Discrete changes in the continual leakage of applied pressures, indicative of active tubal dilation, were only observed during tests in four ears. Passive tubal resistance was similar to that of humans, though all values were characterized by large variances. Active tubal resistance could only be defined for four of the test ears. The ET of eight ears constricted with swallowing. In nine test ears, neither constriction nor dilation was observed during the forced-response test, and four tests showed dilation of the ET with swallowing. These results show that the ETF of the chinchilla is radically different from that of humans or monkeys. (Arch Otolaryngol 1985;111:305-308)

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Section: Methodsmentioning

confidence: 99%

Eustachian Tube Function in the Chinchilla

Doyle¹

1985

Archives of Otolaryngology - Head and Neck Surgery

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“…Testing that hypothesis using similar procedures in a large, mixed population of adults with healthy MEs is not feasible because the Forced-Response test, which provides quantitative, scaled measures for both the passive and active properties of the ET, needs direct access to the ME via a tympanic membrane perforation or a functional tympanostomy tube, conditions that are uncommon in disease-free ears 9 . In contrast, sonotubometry is a non-invasive test of ET opening that only needs an effusion-free ME and patent nasal passages 16,17 .…”

Section: Introductionmentioning

confidence: 99%

Eustachian tube opening measured by sonotubometry is poorer in adults with a history of past middle ear disease

Teixeira

Banks

Swarts

et al. 2014

International Journal of Pediatric Otorhinolaryngology

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Objective Test the hypothesis that active Eustachian tube opening efficiency as measured by sonotubometry is higher in adults with no extant middle-ear disease and no history of previous otitis media (Group-1) when compared to adults with no middle-ear disease but a positive history for otitis media (Group-2). Methods Eustachian tube function for 1 ear of 33 otherwise healthy adult subjects, 16 assigned to Group-1 and 17 to Group-2, was tested by sonotubometry using a standard protocol. For each test, the sound envelopes for 3 swallows were abstracted independently by 2 observers from the data stream and 7 descriptive parameters related to sound envelope “shape” were calculated. Interrelatedness among the values for the parameters was explored using correlation analysis. The contributions of swallow, observer and group to the variance in each parameter were evaluated for significance using a General Linear Model. Results The shape parameters reflecting envelope height, area and rise and fall rates were highly inter-correlated, but those reflecting envelope widths were not. There was no effect of “swallow” on any of the parameters; but there was a significant “observer” effect on all measures of envelope width, greater for observer-2, and a significant “group” effect for 5 of the 7 shape parameters, all greater in Group-1. Conclusions Quantifiable measures of the sound signal “shape” recorded by sonotubometry during swallowing were significantly different between the 2 groups of subjects. This is interpretable as evidencing a more efficient Eustachian tube opening-function in adults with healthy middle ears who do not have a previous history of otitis media when compared to similar adults with a history of prior otitis media. Inefficient Eustachian tube function as children may not be completely resolved by adulthood increasing adult otitis media risk when Eustachian tube function is down-graded by extant upper respiratory diseases that provoke nasopharyngeal inflammation.

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“…1 Determining that parameter requires that an ambient ME pressure gradient be established and then measured before and after a swallow (or other maneuver). Such gradients can be easily created and directly measured in MEs with a direct environmental communication (eg, a nonintact tympanic membrane), 3 and for MEs with intact tympanic membranes, targeted pressure gradients can be created within the environment of a pressure chamber and then measured using tympanometry or related methods. 4 However, these tests require specialized instruments not available in most clinical settings.…”

mentioning

confidence: 99%

Quantitative Description of Eustachian Tube Movements During Swallowing as Visualized by Transnasal Videoendoscopy

Alper

Teixeira

Swarts

et al. 2015

JAMA Otolaryngol Head Neck Surg

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This methodology has application in developing quantitative descriptions of ET mechanics in groups of persons without and with history or suspected ET dysfunction. A lesser degree of soft palate elevation during swallow that derives the ET medial lamina rotation and widening of the ET orifice may be associated with poor ET function and higher risk for otitis media. Videoendoscopic evaluation of the ET orifice may assist in diagnosing presence and mechanism of ET dysfunction.

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Airflow through the Eustachian Tube

Cited by 78 publications

References 10 publications

Eustachian Tube Function in the Chinchilla

Eustachian Tube Function in the Chinchilla

Eustachian tube opening measured by sonotubometry is poorer in adults with a history of past middle ear disease

Quantitative Description of Eustachian Tube Movements During Swallowing as Visualized by Transnasal Videoendoscopy

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