PO2 in Middle Ear Effusion and Eustachian Tube Function

Previous research on eustachian tube function has been devoted mainly to the study of the tubal opening ability and pressure equalization. This article summarizes a series of experimental studies focusing on the closing ability of the tube. Results support the belief that the purpose of the tube should be seen primarily as protecting the middle ear from the extensive pressure variations that physiologically take place in the nasopharynx. A number of studies of diseased ears have shown that tubal malfunction was characterized mainly by a reduced ability to withstand negative pressure in the nasopharynx. Sniffing can evacuate the middle ear, causing high negative intratympanic pressure. It seems likely that this mechanism is involved in the development of middle ear effusion and manifest retraction-type middle ear disease.

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Eustachian tube function as a predictor of the recurrence of middle ear effusion in children

The Laryngoscope ◽

10.1002/lary.24021 ◽

2013 ◽

Vol 123 (9) ◽

pp. 2285-2290 ◽

Cited By ~ 22

Author(s):

Ellen M. Mandel ◽

J. Douglas Swarts ◽

Margaretha L. Casselbrant ◽

Kathleen K. Tekely ◽

Beverly C. Richert ◽

...

Keyword(s):

Eustachian Tube ◽

Middle Ear ◽

Eustachian Tube Function ◽

Middle Ear Effusion ◽

Tube Function ◽

Ear Effusion

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Effect of nasal packing on Eustachian tube function

The Journal of Laryngology & Otology ◽

10.1017/s0022215100116548 ◽

1991 ◽

Vol 105 (7) ◽

pp. 539-540 ◽

Cited By ~ 13

Author(s):

A. C. Thompson ◽

J. A. Crowther

Keyword(s):

Eustachian Tube ◽

Middle Ear ◽

Nasal Packing ◽

Eustachian Tube Function ◽

Middle Ear Effusion ◽

Middle Ear Pressure ◽

Septal Surgery ◽

Tube Dysfunction ◽

Tube Function ◽

Ear Effusion

AbstractSixty-three patients undergoing surgery to the nasal septum followed by bilateral packing had pre- and post-operative tympanometry in order to determine the effect on eustachian tube function. Fifty-five of the 126 ears tested (46 per cent) developed a reduction in middle ear pressure of at least 50 daPa; 76 per cent became normal within 24 hours of removing the nasal packs. All ears were asymptomatic and no patient had evidence of middle ear effusion. Nasal packing following septal surgery is a frequent cause of shortlasting eustachian tube dysfunction but rarely severe enough to cause symptoms or middle ear effusion. Tubal dysfunction is most likely due to a combination of surgical oedema and a direct effect of the nasal packing.

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The Role of Eustachian Tube Dysfunction in Immune-Mediated Middle Ear Effusion and Inflammation

Auris Nasus Larynx ◽

10.1016/s0385-8146(85)80149-8 ◽

1985 ◽

Vol 12 ◽

pp. S203-S205 ◽

Cited By ~ 1

Author(s):

Allen F. Ryan ◽

Jeffrey P. Harris ◽

Antonino Catanzaro ◽

Stephen I. Wasserman

Keyword(s):

Eustachian Tube ◽

Middle Ear ◽

Eustachian Tube Dysfunction ◽

Middle Ear Effusion ◽

Immune Mediated ◽

Tube Dysfunction ◽

Ear Effusion

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Does Septoplasty Affect Middle Ear Pressure and Eustachian Tube Function?

Erciyes Medical Journal ◽

10.5152/etd.2014.8745 ◽

2014 ◽

Vol 36 (3) ◽

pp. 115-118 ◽

Cited By ~ 1

Author(s):

Mehmet Ilhan Sahin ◽

Safak Gulec ◽

Umit Perisan ◽

Ismail Kulahli

Keyword(s):

Eustachian Tube ◽

Middle Ear ◽

Eustachian Tube Function ◽

Middle Ear Pressure ◽

Tube Function

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

The Journal of Laryngology & Otology ◽

10.1017/s0022215119001270 ◽

2019 ◽

Vol 133 (7) ◽

pp. 580-587 ◽

Cited By ~ 1

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.

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