Eustachian Tube Function and Middle Ear Barotrauma Associated with Extremes in Atmospheric Pressure

Miyazawa, Takashi; Yanagita, Noriyuki

doi:10.1177/000348949610501109

Cited by 22 publications

(11 citation statements)

References 21 publications

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“…The balance of air pressure through the TM is maintained by the ET, which opens and allows the passage of gas. 13 It acts as a one-way valve between the nasopharynx and the ME, allowing air outlet from the ME faster than the air intake of the nasopharynx. 13 14 …”

Section: Discussionmentioning

confidence: 99%

Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology

Lima

Farage

Cury

et al. 2014

Int. Arch. Otorhinolaryngol.

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Introduction Middle ear barotrauma is the most common side effect of hyperbaric oxygen therapy. Knowledge and understanding of its pathophysiology are crucial for an accurate diagnosis and proper decision making about treatment and prevention. Objective Describe up-to-date information on pathophysiology of middle ear barotrauma after hyperbaric oxygen therapy considering the physiology of pressure variation of the middle ear. Data Synthesis Middle ear barotrauma occurs especially during the compression phase of hyperbaric oxygen therapy. The hyperoxic environment in hyperbaric oxygen therapy leads to ventilatory dysfunction of the eustachian tube, especially in monoplace chambers, where the patients are pressurized with 100% O2, favoring middle ear barotrauma. Conclusion The eustachian tube, the tympanic cavity, and mastoid work together in a neural controlled feedback system in which various mechanisms concur for middle ear pressure regulation.

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Section: Discussionmentioning

confidence: 99%

Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology

Lima

Farage

Cury

et al. 2014

Int. Arch. Otorhinolaryngol.

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“…Fernau et al [4] pointed out that patients who exhibited Eustachian tube dysfunction after the first HBO treatment were at significantly higher risk for BT, and that a history of Eustachian tube dysfunction accurately predicted the development of BT. In addition, Miyazawa et al [9], of our department, studied Eustachian tube function by using sonotubometry and tympano-aerodynamography before and after treatment with HBO. They found that patients who developed BT exhibited a poorer than normal Eustachian tube function prior to hyperbaric exposure, and suggested that abnormal ET function can be used to predict barotrauma of the middle ear prior to exposure to hyperbaric oxygen.…”

Section: Discussionmentioning

confidence: 99%

Otological Complications of Hyperbaric Oxygen Therapy

Shien¹,

Miyazawa²,

Yanagita³

1998

Hyperbaric Oxygen Therapy in Otorhinolaryngology

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Hyperbaric oxygen (HBO) therapy has been used in our department since 1972, mainly to treat patients with sudden deafness [1], sensorineural loss of hearing, and Bell's palsy. Barotrauma, especially to the middle ear, is one of the most common complications of HBO treatment. The effect can be transient or long-lasting. Data from noncontrolled studies indicate that the incidence of middle ear barotrauma ranges from 5 to 82% [2][3][4][5].In the present retrospective study, we evaluated the incidence of middle ear complications in patients who had received HBO therapy in our institution. We also evaluated the relationship between the volume of the mastoid area of pneumatization and the incidence of middle ear barotrauma. Materials and MethodsBetween 1972 and 1992, 898 patients received HBO therapy at the hospital of Nagoya University for conditions such as sudden deafness (SD), idiopathic bilateral sensorineural hearing loss (IBSHL), Bell's palsy, following the microtia procedure, or other diseases (table 1). Their ages ranged from 9 to 72 years (mean: 37). Of these patients, ears with perforated tympanic membrane (TM) or which lacked an external ear canal were excluded from study, leaving 1,737 ears for data analysis.To eliminate the risk of explosion and ensure safe treatment, HBO therapy was administered in a large air-filled chamber that can accommodate 10 people simultaneously. Every patient in the chamber inhaled pure oxygen from each face mask through treatment. HBO therapy was administered at a pressure of 2 atmosphere absolute (ATA) for 60 min. Compression to 2 ATA occurred in 7 min, whereas decompression required 13 min ( fig. 1). The TM was evaluated prior to each treatment. The Eustachian tube was inflated via a catheter

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“…There are conflicting opinions regarding the role of the Eustachian tube (ET) in the occurrence of MEB 7 . Some authors advocate tube dysfunction as the primary risk factor for this condition 1,[8][9][10] . Others minimize its influence 2,11,12 .…”

Section: Introductionmentioning

confidence: 99%

Middle ear barotrauma after hyperbaric oxygen therapy - the role of insuflation maneuvers

Lima¹,

Farage²,

Cury³

et al. 2012

The International Tinnitus Journal

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Eustachian Tube Function and Middle Ear Barotrauma Associated with Extremes in Atmospheric Pressure

Cited by 22 publications

References 21 publications

Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology

Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology

Otological Complications of Hyperbaric Oxygen Therapy

Middle ear barotrauma after hyperbaric oxygen therapy - the role of insuflation maneuvers

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