scholarly journals Middle ear ventilation status postoperatively after translabyrinthine resection of vestibular schwannoma with mastoid obliteration and Eustachian tube occlusion: is the Eustachian tube enough to ventilate the middle ear without the mastoid air cell system?

2016 ◽  
Vol 45 (1) ◽  
Author(s):  
James Belyea ◽  
Brandon Wickens ◽  
Manohar Bance
Keyword(s):  
Eustachian Tube ◽  
Middle Ear ◽  
Vestibular Schwannoma ◽  
Cell System ◽  
Mastoid Obliteration ◽  
Middle Ear Ventilation

Middle Ear Ventilation in Secretory Otitis Media

1976 ◽  
Vol 85 (2_suppl) ◽  
pp. 178-181 ◽  
Author(s):  
Jörgen Holmquist ◽  
Ulf Renvall
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Cell System ◽  
Eustachian Tube Function ◽  
Secretory Otitis Media ◽  
Pressure Equalization ◽  
Middle Ear Ventilation ◽  
Tube Function ◽  
Equalization Technique

The Eustachian tube function was determined repeatedly in 42 patients during as well as after the course of secretory otitis media. Air pressure equalization technique and impedance audiometry were used. Also the size of the mastoid air cell system was determined. It was found that poor tubal function and a small mastoid air cell system are significant findings in these ears.

Nasal surgery and eustachian tube function: effects on middle ear ventilation

2005 ◽  
Vol 30 (5) ◽  
pp. 409-413 ◽  
Author(s):  
F. Salvinelli ◽  
M. Casale ◽  
F. Greco ◽  
L. D'Ascanio ◽  
T. Petitti ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Middle Ear ◽  
Eustachian Tube Function ◽  
Nasal Surgery ◽  
Middle Ear Ventilation ◽  
Tube Function

Pneumatization of the Tympanic Bulla after Blockage of the Ventilation Route through the Eustachian Tube in the Pig

1996 ◽  
Vol 105 (10) ◽  
pp. 784-790 ◽  
Author(s):  
Fumio Ikarashi ◽  
Yuichi Nakano ◽  
Takahiro Okura
Keyword(s):  
Gas Exchange ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Cell System ◽  
Capillary Network ◽  
The Other ◽  
Other Hand ◽  
Air Cells ◽  
Middle Ear Cleft ◽  
Mastoid Air Cells

To examine whether gas exchange occurs in the middle ear air cell system independent of the eustachian tube (ET), we occluded the middle ear clefts of piglets, whose tympanic bullae closely resemble the human mastoid air cell system, and investigated subsequent changes in the air cell system. We anticipated that pneumatization and development of the air cell system would continue if gas were exchanged through the mucosa lining the air cell system. If, on the other hand, mastoid air cells depend on the ET, mastoid development would be impaired or arrested. In noninflamed ears, pneumatization was maintained, and development of the air cell system continued after the middle ear cleft had been occluded with an acrylate adhesive and the bullar air cell system was thus excluded from any communication with the ET. These results indicate that the normal middle ear air cell system has the capacity to perform gas exchange independently of the ET, with gas exchange appearing to occur through the submucosal capillary network.

scholarly journals Effect of nasal obstruction surgery on eustachian tube function and middle ear ventilation

2020 ◽  
Vol 6 (6) ◽  
pp. 1054
Author(s):  
Shiv Kumar Rathaur ◽  
Jagram Verma
Keyword(s):  
Nasal Obstruction ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Favourable Effect ◽  
Middle Ear Surgery ◽  
Eustachian Tube Function ◽  
Middle Ear Pressure ◽  
Middle Ear Ventilation ◽  
Tube Function ◽  
Eustachian Tube Function Test

<p class="abstract"><strong>Background:</strong> The purpose of this study was to assess the effect of surgery for nasal obstruction in improving Eustachian tube function and middle ear ventilation.</p><p class="abstract"><strong>Methods:</strong> This prospective study involved 60 patients with different nasal pathologies causing nasal obstruction along with complaints of ear fullness. In required cases the nasal pathologies were surgically managed. Pre and postoperative impedance audiometric evaluation and nasal endoscopy were done to assess the eustachian tube function, changes the value of middle ear pressure and ear fullness sensation at 1 month and at 3 months after surgery.  </p><p class="abstract"><strong>Results:</strong> Preoperatively, 56 (93.3%) patients had sensation of ear fullness, postoperatively at 1 month and at 3 months after nasal surgery only 20 (33.3%) patient and 18 (30%) respectively, has sensation of ear fullness, with significant improvement (p&lt;0.05). Preoperatively, 74 (61.6%) ears were type A tympanogram, 50 ears of them had poor eustachian tube function and 24 ears had good Eustachian tube function. 42 (35%) ears were type C, 4 (3.3%) ear were type B tympanogram, all of them had poor eustachian tube function. The postoperative results of eustachian tube function test and tympanometric value were significantly better than preoperative results (p&lt;0.05).</p><p class="abstract"><strong>Conclusions:</strong> We find out that nasal obstruction has a definite relationship with eustachian tube function. Surgery for nasal obstruction has a favourable effect on the middle ear pressure and eustachian tube function. Corrective surgery for nasal obstruction should be considered at least 1 month before undertaking the middle ear surgery to improve middle ear ventilation.</p>

Transtympanic Eustachian Tuboplasty and Tolerance of Stenting Materials

1983 ◽  
Vol 91 (4) ◽  
pp. 407-411 ◽  
Author(s):  
James L. Parkin ◽  
Leland P. Johnson ◽  
James C. Stringham
Keyword(s):  
Eustachian Tube ◽  
Middle Ear ◽  
Eustachian Tube Function ◽  
Type B ◽  
Stent Removal ◽  
Tympanic Membrane Perforations ◽  
Middle Ear Ventilation ◽  
Tube Function ◽  
Type C ◽  
Polyurethane Stents

The purpose of this study was to evaluate various eustachian tube stenting materials in an attempt to develop a successful transtympanic eustachian tuboplasty technique. Eustachian tube mucosa was removed transtympanically in 40 feline ears. Ten ears were used as controls. Polyethylene, Silastic, and polyurethane stents were placed in 30 ears, 10 ears with each material. The ears were evaluated after a minimum of 8 weeks and the stents were removed. Eight weeks after stent removal the ears were assessed visually, tympanometrically, and by biopsies of the osseous eustachian tube mucosa. Inadequate middle ear ventilation as evidenced by persistent otitis media, persistent tympanic membrane perforations, or type B or type C tympanograms was found in 60% of control, 30% of Silastic-stented, 60% of polyurethane-stented, and 0% of polyethylene-stented ears. Small polyethylene stents were most successful in reestablishing eustachian tube function in this experiment.

Multiple Osteomas of Eustachian Tube Causing Ipsilateral Otitis Media

2020 ◽  
Vol 16 (8) ◽  
pp. 1052-1054
Author(s):  
Suzan Saylisoy
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Chronic Otitis Media ◽  
Suture Line ◽  
Limited Data ◽  
Radiological Features ◽  
Middle Ear Ventilation ◽  
Basic Functions ◽  
Anatomical Area

Background: Middle ear ventilation and the drainage of secretions are the basic functions of the eustachian tube. Eustachian tube (ET) dysfunction can lead to otitis media. Multiple causes of ET dysfunction exist; ET obstruction is one of them. Osseous obliteration of ET is quite rare. In the literature, there are two cases of solitary osteoma and a case of hamartoma with an osseous content in the ET. Herein, this report describes the case of a patient with multiple osseous lesions consistent with osteomas in the ET, causing ipsilateral otitis media with CT findings. Case Report: A 53-year-old woman presented with left-sided intermittent otalgia and otorrhea. Temporal bone computed tomography showed opacification of middle ear consistent with otitis media and nearly complete blockage of the left ET lumen with multiple osseous lesions wall probably consistent with osteomas on the left side. Conclusion: There are limited data about the radiological features of ET osteoma due to its rare occurrence. Radiographically, external ear osteoma generally appears as a single pedunculated hyperdense mass on CT scan originating from the tympanosquamous or tympanomastoid suture line and extending into the auditory canal with otherwise preserved canal dimensions. Considering this information, osseous lesions arising from ET bone wall and extending into the lumen in the present case were considered as osteomas. Especially in the case of unilateral chronic otitis media, ET should not remain a neglected anatomical area.

Normal and Abnormal Middle Ear Ventilation

1977 ◽  
Vol 86 (4_suppl2) ◽  
pp. 1-15 ◽  
Author(s):  
Erdem I. Cantekin ◽  
Charles D. Bluestone ◽  
William J. Doyle ◽  
Carlos A. Saez ◽  
David C. Phillips
Keyword(s):  
Animal Model ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Ventilatory Function ◽  
Predisposing Factor ◽  
Tube Obstruction ◽  
Middle Ear Pressure ◽  
Middle Ear Ventilation ◽  
Tube Function ◽  
One Year

Studies in infants and children have suggested a functional rather than mechanical obstruction of the Eustachian tube as a predisposing factor in middle ear effusions (MEE). To simulate this condition in the laboratory, an animal model was prepared using juvenile Rhesus monkeys. The tensor veli palatini muscle was transected or expunged posterior to the hamulus of the medial pterygoid lamina. Transection of the muscle resulted in negative middle ear pressure without effusion, whereas when the muscle was expunged, the animals developed a brief episode of negative middle ear pressure followed by a persistent MEE that was sterile for bacteria. An acute bacterial MEE developed following instillation of Streptococcus pneumoniae into the nasopharynx of animals that had had a previous unilateral transection of the muscle. The condition of the middle ear was documented by impedance measurements and presence of the effusion was verified by myringotomy. Animals were periodically examined and tested for Eustachian tube ventilatory function over a period of one year. Before surgical alteration of the tensor muscle. Eustachian tube function tests demonstrated normal ventilatory function, whereas, functional Eustachian tube obstruction patterns similar to studies in children who had MEE were found during the postoperative period. Only after the development of a reliable animal model can current and future methods of management of MEE be tested under controlled laboratory conditions. These data suggest that the Rhesus monkey appears to be an excellent model for the study of normal as well as abnormal tubal function.

scholarly journals Treatment of Middle Ear Ventilation Disorders: Sheep as Animal Model for Stenting the Human Eustachian Tube – A Cadaver Study

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113906 ◽  
Author(s):  
Felicitas Miller ◽  
Alice Burghard ◽  
Rolf Salcher ◽  
Verena Scheper ◽  
Wolfgang Leibold ◽  
...  
Keyword(s):  
Animal Model ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Cadaver Study ◽  
Middle Ear Ventilation

Correlation of Tubal Function and Volume of Mastoid and Middle Ear Space as Related to Otitis Media

1976 ◽  
Vol 85 (2) ◽  
pp. 198-203 ◽  
Author(s):  
Lars Andréasson
Keyword(s):  
Otitis Media ◽  
Eustachian Tube ◽  
Middle Ear ◽  
Chronic Otitis Media ◽  
Mucosal Damage ◽  
Cell System ◽  
Tubal Function ◽  
Functional Volume ◽  
Air Cells ◽  
Mastoid Air Cells

In 69 ears with chronic otitis media and nine ears with traumatic perforations tubal function, the size of the mastoid air cell system measured planimetrically on roentgenograms and the functional volume of the air filled ear spaces were studied for any correlations. The roentgenographic area and the functional volume were also studied for any variation in the duration of the disease. A correlation was found between abnormally small volumes and impaired tubal function, probably due to mucosal damage of the whole system, i.e. Eustachian tube, middle ear and mastoid air cells. No such association was found between area and tubal function. The volume, but not the area, decrease with the duration of the disease.

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