open access

Vol 71, No 3 (2020)
Original article
Published online: 2020-09-28
Submitted: 2020-07-27
Accepted: 2020-09-11
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Eustachian tube function test as a predictor of middle ear barotrauma

Konstantin Petrov Georgiev, Nikola Georgiev Shopov
DOI: 10.5603/IMH.2020.0035
·
Pubmed: 33001432
·
International Maritime Health 2020;71(3):195-200.

open access

Vol 71, No 3 (2020)
HYPERBARIC MEDICINE Original article
Published online: 2020-09-28
Submitted: 2020-07-27
Accepted: 2020-09-11

Abstract

Background: Most of the cases of middle ear barotrauma in divers are due to the impassability of the Eustachian tube. The aim of our study is to compare the results of tympanometry and Valsalva part of Eustachian Tube Function test (ЕТF-test) with the ability of divers to compensate for the change in ambient pressure in a hyperbaric chamber.
Material and methods: The study included 35 professional divers undergoing annual medical examination. For all subjects is measured first intratympanal pressure at rest, then after the maneuver of Valsalva with impedancemeter. Then a barofunction test (BFT) was performed to assess the diving fitness and the passability of the Eustachian tubes. It consists of divers compressing and decompressing in a hyperbaric chamber to a pressure of 2.2 ATA for 1 minute. Based on results from previous studies we are using a 20 DaPa cutoff point on the ETF test to predict Eustachian tube passability and a successful barofunction test.
Results: In the current study 24 divers have ETF test results higher than 20 DaPa. 3 divers have ETF test values lower than 20 DaPa in both ears, but none of them displayed difficulties in the BFT. 8 divers have ETF values lower than 20 DaPa in one ear and higher than 20 DaPa in the other. 7 of the last group displayed difficulties with the BFT in the ear with poor ETF result.
Conclusions: We consider that the ETF test can be used to assess diving fitness as a screening method before performing a BFT, as values above 20 DaPa guarantee Eustachian tube function sufficient for diving activities. Values of 20 DaPa and less are not a definite predictor of the BFT results. The results of the ETF test can also be used in the usual work of an otorhinolaryngologist to evaluate Eustachian function in cases of unilateral disease of middle ear.

Abstract

Background: Most of the cases of middle ear barotrauma in divers are due to the impassability of the Eustachian tube. The aim of our study is to compare the results of tympanometry and Valsalva part of Eustachian Tube Function test (ЕТF-test) with the ability of divers to compensate for the change in ambient pressure in a hyperbaric chamber.
Material and methods: The study included 35 professional divers undergoing annual medical examination. For all subjects is measured first intratympanal pressure at rest, then after the maneuver of Valsalva with impedancemeter. Then a barofunction test (BFT) was performed to assess the diving fitness and the passability of the Eustachian tubes. It consists of divers compressing and decompressing in a hyperbaric chamber to a pressure of 2.2 ATA for 1 minute. Based on results from previous studies we are using a 20 DaPa cutoff point on the ETF test to predict Eustachian tube passability and a successful barofunction test.
Results: In the current study 24 divers have ETF test results higher than 20 DaPa. 3 divers have ETF test values lower than 20 DaPa in both ears, but none of them displayed difficulties in the BFT. 8 divers have ETF values lower than 20 DaPa in one ear and higher than 20 DaPa in the other. 7 of the last group displayed difficulties with the BFT in the ear with poor ETF result.
Conclusions: We consider that the ETF test can be used to assess diving fitness as a screening method before performing a BFT, as values above 20 DaPa guarantee Eustachian tube function sufficient for diving activities. Values of 20 DaPa and less are not a definite predictor of the BFT results. The results of the ETF test can also be used in the usual work of an otorhinolaryngologist to evaluate Eustachian function in cases of unilateral disease of middle ear.

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Keywords

Eustachian tube function test, Eustachian tube passability, barofunction test, middle ear barotrauma

About this article
Title

Eustachian tube function test as a predictor of middle ear barotrauma

Journal

International Maritime Health

Issue

Vol 71, No 3 (2020)

Article type

Original article

Pages

195-200

Published online

2020-09-28

DOI

10.5603/IMH.2020.0035

Pubmed

33001432

Bibliographic record

International Maritime Health 2020;71(3):195-200.

Keywords

Eustachian tube function test
Eustachian tube passability
barofunction test
middle ear barotrauma

Authors

Konstantin Petrov Georgiev
Nikola Georgiev Shopov

References (11)
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