Universität zu Köln

Mikolajczak, Stefanie, Meyer, Moritz Friedo, Felsch, Moritz, Jumah, Masen Dirk, Huettenbrink, Karl-Bernd, Grosheva, Maria ORCID: 0000-0002-5985-468X, Luers, Jan-Christoffer and Beutner, Dirk (2015). Is there a difference between active opening of the Eustachian tube in a hypobaric surrounding compared to a hyperbaric surrounding? Undersea Hyperb. Med., 42 (6). S. 593 - 600. DURHAM: UNDERSEA & HYPERBARIC MEDICAL SOC INC. ISSN 1066-2936

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Abstract

Introduction: The Eustachian tube (ET) is the key to pressure equalization between the middle ear and ambient pressure. To date, little is known about differences of the opening mechanisms under hyper- or hypobaric conditions. Aim of this study was to compare standard ET opening parameters during standardized hypo- and hyperbaric exposures. Methods: Thirty healthy participants were exposed to a standardized profile of decompression and compression (SPDC) in a hypo-/hyperbaric pressure chamber. Impedance, expressed as tympanic membrane compliance, was recorded at intervals during the excursions from 1 atmosphere absolute (atm abs) to 0.8 and 1.2 atm abs respectively. Parameters for tubal opening were obtained during SPDC: ET opening pressure (ETOP), ET opening duration (ETOD) and ET opening frequency (ETOF), hypobaric (Phase 1) and hyperbaric (Phase 2) data were compared. Results: Mean value for Valsalva maneuver ETOP was 40.10 +/- 19.02 mbar in Phase 2 vs. 42.82 +/- 21.75 mbar in Phase 1. For ETOD it was 2.80 +/- 2.09 seconds in Phase 2 vs. 2.51 +/- 1.90 seconds in Phase 1. For swallowing, mean value for ETOP was 33.47 +/- 14.50 mbar in Phase 2 vs. 28.44 +/- 14.04 in Phase 1. ETOD was 0.82 +/- 0.60 seconds in Phase 2 vs. 0.76 +/- 0.55 seconds in Phase 1. There was no statistical significance for ETOP, ETOD and ETOF between the two phases. Conclusion: No statistical significant difference was evident for active pressure equalization (Valsalva and swallowing) between a hyperbaric setting (dive) and a hypobaric setting (flight) in healthy subjects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mikolajczak, Stefanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Meyer, Moritz Friedo UNSPECIFIED UNSPECIFIED UNSPECIFIED Felsch, Moritz UNSPECIFIED UNSPECIFIED UNSPECIFIED Jumah, Masen Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Huettenbrink, Karl-Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Grosheva, Maria UNSPECIFIED orcid.org/0000-0002-5985-468X UNSPECIFIED Luers, Jan-Christoffer UNSPECIFIED UNSPECIFIED UNSPECIFIED Beutner, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-387438
Journal or Publication Title:	Undersea Hyperb. Med.
Volume:	42
Number:	6
Page Range:	S. 593 - 600
Date:	2015
Publisher:	UNDERSEA & HYPERBARIC MEDICAL SOC INC
Place of Publication:	DURHAM
ISSN:	1066-2936
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MIDDLE-EAR MECHANICS; TESTS Multiple languages Marine & Freshwater Biology; Medicine, Research & Experimental Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38743