Assessment of the Importance of Tympanic Membrane Mechanoreceptors on Eustachian Tube Function Based on Pressure Chamber Measurements

2018 ◽  
Vol 39 (3) ◽  
pp. e203-e208
Author(s):  
Moritz F. Meyer ◽  
Anja Schoch ◽  
Stefanie Jansen ◽  
Karl-Bernd Hüttenbrink ◽  
Dirk Beutner
Keyword(s):  
Tympanic Membrane ◽  
Eustachian Tube ◽  
Pressure Chamber ◽  
Eustachian Tube Function ◽  
Tube Function ◽  
Chamber Measurements

A New Impedance Method for Measuring Middle Ear Mechanics and Eustachian Tube Function

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 207-210 ◽  
Author(s):  
Alf Ivarsson
Keyword(s):  
Tympanic Membrane ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Pressure Chamber ◽  
Impedance Method ◽  
Neutral Position ◽  
Eustachian Tube Function ◽  
Small Pressure ◽  
Middle Ear Mechanics ◽  
Tube Function

The main principle of this new impedance method is a continuous recording of changes in tympanic membrane compliance in relation to its neutral position during changes in pressure, using a small pressure chamber. The subject sitting in the chamber can be placed in the recumbent position by rotation of the chamber. The working principles of the impedance method are: a servosystem regulates displacement of the loudspeaker membrane in order to keep the sound pressure in the external ear canal constant, independent of tympanic membrane compliance. From this recording it is possible to isolate tympanic membrane compliance during changes in intratympanic pressure as well as during ambient pressure changes. The results indicate that the new regulated impedance method combined with the small pressure chamber should be useful in routine clinical examination of middle ear mechanics and eustachian tube function.

Measuring dynamic Eustachian tube function using tympanometry in a pressure chamber: the effect of nasal betahistine application

2019 ◽  
Vol 133 (7) ◽  
pp. 580-587 ◽  
Author(s):  
B K-H G Franz ◽  
R Patuzzi ◽  
C J Wraight ◽  
G Kay ◽  
A Ng ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Middle Ear ◽  
Animal Studies ◽  
Pressure Chamber ◽  
Chamber Pressure ◽  
Eustachian Tube Function ◽  
Hyperbaric Chamber ◽  
Middle Ear Pressure ◽  
Tube Dysfunction ◽  
Tube Function

AbstractObjectiveTo assess the effect of topical betahistine on Eustachian tube function in subjectively abnormal subjects in a hyperbaric chamber.MethodActive and passive Eustachian tube function was examined using tympanometry in a pressure chamber.ResultsActive Eustachian tube function was tested against the negative middle ear pressure induced by increasing the chamber pressure to +3 kPa. One voluntary swallow decreased middle-ear pressure by a mean of 1.36 kPa. Passive Eustachian tube function was tested by measuring spontaneous Eustachian tube openings as the chamber pressure dropped from +10 kPa to ambient. Four distinct patterns of Eustachian tube behaviour were seen, three of which indicated Eustachian tube dysfunction. Betahistine had no positive effect on Eustachian tube opening, although previous animal studies had suggested a beneficial effect.ConclusionTopical betahistine had no effect on Eustachian tube function. Combining a hyperbaric chamber with tympanometry proved ideal for evaluating Eustachian tube function.

Eustachian Tube Function and Retraction of the Tympanic Membrane

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 65-66 ◽  
Author(s):  
Jörgen Holmquist ◽  
Ulf Renvall ◽  
Pål Svendsen
Keyword(s):  
Tympanic Membrane ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Air Pressure ◽  
Eustachian Tube Function ◽  
Present Material ◽  
Pressure Equalization ◽  
Air Volume ◽  
Middle Ear Cholesteatoma ◽  
Tube Function

The medial displacement of the tympanic membrane or the retracted tympanic membrane is a common clinical finding. Also, retractions are looked upon as the precursor of middle ear cholesteatoma. In current otologic literature there seems to be some dispute whether the retractions of the tympanic membrane are caused by negative intratympanic air pressure or by shrinkage of middle ear adhesions pulling the tympanic membrane or part of it medially. In this study only ears with posterior/superior retractions of the tympanic membrane were investigated. Tympanometry revealed that only 33% of the ears did have middle ear pressure within ± 100 mm H2O. After insertion of a polyethylene tube through the tympanic membrane, the eustachian tube function was tested using the air pressure equalization technique. None of the ears could change the negative air pressure upon swallowing. Planometric measurements on the x-ray of the mastoid air cell system of the present material deviate from those of a normal material, indicating a significantly smaller air volume in the present material. It may be concluded that dysfunction of the eustachian tube and a small air volume of the mastoid are characteristic features of an ear with posterior/superior retraction of the tympanic membrane.

scholarly journals Prospective study on the Eustachian tube function during Frenzel maneuver in a hypobaric/hyperbaric pressure chamber

2021 ◽  
Author(s):  
Philipp Wolber ◽  
Moritz Friedo Meyer ◽  
Kristijana Knesic ◽  
Svenja Rink ◽  
Stefanie Jansen ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Valsalva Maneuver ◽  
Pressure Chamber ◽  
Eustachian Tube Function ◽  
Opening Pressure ◽  
Pressure Equalization ◽  
Hyperbaric Pressure ◽  
Tube Function ◽  
Pressure Dynamics ◽  
Standard Values

Abstract Introduction The Frenzel maneuver describes a technique for middle ear equalizing which is frequently used by apnea divers. It offers advantages compared to the most commonly used techniques such as the Valsalva or Toynbee maneuver. Until now, there is insufficient literature about the pressure dynamics and Eustachian tube (ET) function during the Frenzel maneuver. The aim of the present study was to characterize the ET function during the Frenzel maneuver. Materials and methods By means of an established standardized profile of compression and decompression in a hypo/hyperbaric pressure chamber, we examined different parameters such as the ET opening pressure (ETOP), ET opening duration (ETOD), and ET opening frequency (ETOF) in 11 experienced apnea divers and compared them to the parameters during the Valsalva and Toynbee maneuver. Results Standard values for ETOP, ETOD, and ETOF could be established for the Frenzel maneuver under standardized conditions in a hypo/hyperbaric pressure chamber. Compared to the Frenzel maneuver, ETOP was higher and ETOD longer (both p < 0.001) during the Valsalva maneuver whereas ETOP was lower and ETOD shorter (both p < 0.001) during the Toynbee maneuver. No difference regarding ETOF was observed between the Frenzel, Valsalva, and Toynbee maneuver. Discussion The Frenzel maneuver was shown to be at least as effective as the Valsalva maneuver concerning ET opening. We believe that knowledge of the Frenzel technique might facilitate the pressure equalization during diving and recommend implementation of an appropriate equalization training in apnea and scuba diving education.

Eustachian Tube Function in Children with Normal Middle Ear and with Tympanic Membrane Retraction

2013 ◽  
Vol 149 (2_suppl) ◽  
pp. P224-P225
Author(s):  
Inesangela Canali ◽  
Leticia S. Rosito ◽  
Sady S. Da Costa ◽  
Bruno Siliprandi ◽  
Claudia Giugno
Keyword(s):  
Tympanic Membrane ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Eustachian Tube Function ◽  
Tube Function ◽  
Tympanic Membrane Retraction

Pressure chamber tests of eustachian tube function document lower efficiency in adults with colds when compared to without colds

2014 ◽  
Vol 134 (7) ◽  
pp. 691-697 ◽  
Author(s):  
William J. Doyle ◽  
Alok Singla ◽  
Juliane Banks ◽  
Jenna El-Wagaa ◽  
J. Douglas Swarts
Keyword(s):  
Eustachian Tube ◽  
Pressure Chamber ◽  
Eustachian Tube Function ◽  
Lower Efficiency ◽  
Tube Function
Sign in / Sign up

Export Citation Format

Share Document