Eustachian Tube Lumen: Comparison between Normal and Inflamed Specimens

1989 ◽  
Vol 98 (8) ◽  
pp. 630-634 ◽  
Author(s):  
Jacob Sadé ◽  
Michal Luntz

This study presents measurements of the cross-sectional luminal area of the eustachian tube. Comparisons are made between the lumens of eustachian tubes obtained from temporal bones presenting acute or secretory otitis media and those from noninflamed temporal bones. The material consisted of 71 temporal bones obtained postmortem from individuals up to 2 years of age. Forty-six of these showed no middle ear inflammation, while 25 presented either acute or secretory otitis media. In both groups the lumens of all the eustachian tubes were patent, presenting no obstruction. The mean cross-sectional area of the lumens of inflamed temporal bones was smaller than that of the noninflamed ones. This difference was not found to be statistically significant in the cartilaginous regions and was found to be statistically significant or borderline significant in the bony parts of the eustachian tube.

1997 ◽  
Vol 106 (7) ◽  
pp. 583-588 ◽  
Author(s):  
Masaharu Sudo ◽  
Isamu Sando ◽  
Akihiro Ikui ◽  
Chiaki Suzuki

Nine normal human temporal bones from persons 16 to 88 years old were studied by computer aided three-dimensional reconstruction and measurement. The length of the eustachian tube (ET) lumen in three portions (from pharyngeal orifice to tympanic orifice: cartilaginous, junctional, and bony) averaged 23.6 ±4.3 mm, 3.0 ± 1.9 mm, and 6.4 ± 2.6 mm. The narrowest portion of the ET lumen was in the cartilaginous portion in all cases: 20.5 ± 4.2 mm from the pharyngeal orifice and 3.1 ± 1.6 mm from the pharyngeal margin of the junctional portion. The cross-sectional area of the narrowest portion was 0.65 ± 0.2 mm2. The tendon of the tensor veli palatini muscle (TVPM) inserted into the lateral lamina in the narrowest portion of the ET lumen in five of nine cases. These results suggest that contraction of the TVPM opens the narrowest portion of the ET lumen to ventilate the middle ear and that this portion also plays a role in protecting the middle ear.


1988 ◽  
Vol 97 (3) ◽  
pp. 219-221 ◽  
Author(s):  
Richard A. Buckingham

Secretory otitis media, middle ear atelectasis, and retraction type cholesteatomas are the most frequently occurring chronic middle ear diseases; and eustachian tube obstruction and the generation of negative or less than atmospheric middle ear pressure is said to be an essential factor in the pathogenesis of these diseases. It has been found that habitual sniffing causes high degrees of negative middle ear pressure in diseased ears; this finding demonstrates eustachian tube patency rather than obstruction. Ears intubated for chronic secretory otitis media, middle ear atelectasis, and cholesteatoma were examined to identify patent eustachian tubes. More than one third of the patients aspirated a solution into the middle ear with one or more sniffs by aspirating air from their middle ears, demonstrating eustachian tube patency rather than obstruction.


1989 ◽  
Vol 98 (1_suppl2) ◽  
pp. 2-32 ◽  
Author(s):  
George A. Gates ◽  
J. C. Cooper ◽  
Christine A. Avery ◽  
Thomas J. Prihoda

To study the effectiveness of adenoidectomy and tympanostomy tubes in the treatment of chronic otitis media with effusion, we randomly assigned 578 4- to 8-year-old children to receive one of the following: Bilateral myringotomy and no additional treatment (group 1), tympanostomy tubes (group 2), adenoidectomy and myringotomy (group 3), or adenoidectomy and tympanostomy tubes (group 4). The 491 who accepted surgical treatment were evaluated at 6-week intervals for up to 2 years. Treatment effect was assessed by four main outcomes: Time with effusion, time with hearing loss, time to first recurrence of effusion, and number of surgical re-treatments. For the groups (in order), the mean percent of time with any effusion in either ear was 49, 35, 30, 26 (p < .0001); the mean percent of time with hearing thresholds 20 dB or greater was 19, 10, 8, and 7 (p < .0001) in the better ear; and 38, 30, 22 and 22 in the worse ear (p < .0001); the median number of days to first recurrence was 54, 222, 92, and 240 (p < .0001); and the number of surgical re-treatments was 66, 36, 17, and 17 (p < .0001). The most notable adverse sequela, purulent otorrhea, occurred in 22%, 29%, 11%, and 24% of the patients assigned to groups 1 through 4, respectively (p < .001). In severely affected children who have chronic otitis media with effusion resistant to medical therapy, adenoidectomy is an effective treatment. Adenoidectomy plus bilateral myringotomy lowered posttreatment morbidity more than tympanostomy tubes alone and to the same degree as did adenoidectomy and tympanostomy tubes. Adenoidectomy appears to modify the underlying pathophysiology of chronic otitis media with effusion. This effect is independent of the preoperative size of the adenoid. Tympanostomy tube drainage and ventilation of the middle ear provide adequate palliation so long as the tubes remain in place and functioning. We recommend that adenoidectomy be considered in the initial surgical management of 4- to 8-year-old children with hearing loss due to chronic secretory otitis media that is refractory to medical management and, further, that the size of the adenoid not be used as a criterion for adenoidectomy. Concomitant bilateral myringotomy with suction aspiration of the middle ear contents also should be done, with or without placement of tympanostomy tubes at the discretion of the surgeon.


2015 ◽  
Vol 4 (1) ◽  
pp. 10-15
Author(s):  
Chao Wen ◽  
Xiaoyu Wang ◽  
Taisheng Chen ◽  
Hongying Ruan ◽  
Peng Lin

Abstract Secretory otitis media (SOM) is a common and frequently occurring disease featured by middle ear cavity exudant, ear nausea, and hearing loss. Morbidity of children is higher than that of adults. The pathogenesis and etiology of SOM are clear so far. Previous reports concluded that the mechanical obstruction and dysfunction of the eustachian tube are among the important causes of infection. The mechanism of infection and immune response in the pathogenesis of SOM is currently becoming a research hot spot, providing a reference for further study.


1977 ◽  
Vol 86 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Mirko Tos ◽  
K. Bak-Pedersen

On 64 temporal bones from slightly abnormal and pathological prematures and newborn infants, children, and adults, 35,000–40,000 counts of goblet cells were done in different parts of the Eustachian tube and middle ear. The goblet cells were present in all Eustachian tubes and middle ear areas. In ears previously exposed to infection the density was slightly increased in the tubal orifice and in most parts of the middle ear. In subacute and acute pathological actions, especially tubal occlusion, and in chronic diseases, such as active chronic otitis and in secretory otitis media, the goblet-cell density is appreciably increased.


1976 ◽  
Vol 85 (2_suppl) ◽  
pp. 178-181 ◽  
Author(s):  
Jörgen Holmquist ◽  
Ulf Renvall

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.


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